# The 2009 Europhysics Conference on High Energy Physics

Europe/Warsaw
Auditorium Maximum (Kraków, Poland)

### Auditorium Maximum

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
Description
The 2009 Europhysics Conference on High Energy Physics, a biennual conference of the High Energy and Particle Physics Division of the European Physical Society. The conference is organized by the local scientific institutions: Henryk Niewodniczanski Institute of Nuclear Physics Polish Academy of Sciences (IFJ PAN Kraków), Jagiellonian University (UJ Kraków), AGH University of Science and Technology (AGH UST Kraków), Polish Physical Society (PTF Warsaw).
Participants
• Agnieszka Luszczak
• Agnieszka Majczyna
• Agnieszka Pollo
• Agnieszka Zalewska
• Alain Blondel
• Alberto Lusiani
• alberto vecchio
• Aleksander Filip Zarnecki
• Aleksander Kusina
• Alessandro Grelli
• Alessandro Strumia Strumia
• Alexander Borissov
• Alexander Kappes
• Alexander Mueck
• Alexander Schmidt
• Alexey Drutskoy
• Alexey Zhemchugov
• Alfredo Davide Ferella
• Alison Lister
• Amarjit Soni
• Amir Rezaeian
• Anastasia Bolshakova
• Andras Agocs
• Andre Mischke
• Andrea Ferroglia
• Andrea Giammanco
• Andrea Giuliani
• Andrea Lavagno
• Andreas Hoecker
• Andreas Reinsch
• Andreas Richter
• Andreas van Hameren
• Andrei Gritsan
• Andrey Golutvin
• Andrzej Bozek
• Andrzej Budzanowski
• Andrzej J. Buras
• Andrzej Krolak
• Andrzej Olszewski
• Andrzej Rybicki
• Andrzej Siódmok
• Andrzej Szelc
• Andrzej Zemla
• Angel Uranga
• Aniello Nappi
• Anna Kaczmarska
• Anna Kaminska
• Anna Kulesza
• Anna Lipniacka
• antoine Marzin
• Anton Poluektov
• Antoni Szczurek
• Antonino Pullia
• Antonio Baroncelli
• Antonio Davide Polosa
• Antonio Ferrando
• Antonio Policicchio Policicchio
• Apostolos Skouroupathis
• Arafat Gabareen Mokhtar
• Aristotelis Kyriakis
• ASAMU OKANLAWON S
• ASSANE MBOUP
• Barbara Wosiek
• Bari Osmanov
• Beata Brzozowska
• Beauty Obaseki
• Ben Constance
• Benoit Blossier
• Bernardo Resende
• Bernd Surrow
• Biagio Di Micco
• Bjoern Penning
• Bob van Eijk
• Boleslaw Wyslouch
• Bostjan Golob
• Bruno Casal Laraña
• Burkard Reisert
• Carlo Baccigalupi
• Carlo Civinini
• Carlos Alberto Peixoto Lobo
• Carlos Chavez
• carlos yaguna
• Carmen Palomares
• Caterina Biscari
• Caterina Bloise
• Cecilia Tarantino
• Celine Boehm
• Chao Liu
• Charalampos Anastasiou
• Cheng-Chin Chiang
• Chiara MERONI
• CHIEN-YI MA
• Chih-Ching Chen
• Christian Autermann
• Christian Fabjan
• Christian Schwanenberger
• Christian Schwinn
• Christian Spiering
• Christine Clarke
• Christoph Pahl
• Christophe Grojean
• Christophe Royon Royon
• Christopher Bassey
• Christopher Hays
• Clara Jordá
• Claude Amsler
• Claudia Glasman
• Claudio Conta
• Claudio Ferretti
• Claudio Gatti
• Claudio Giganti
• Corinne Goy
• Cristina Botta
• Cristina Carloganu
• Dan-Olof Riska
• Daniel Hernández
• Daniel Maitre
• Daniel Pitzl
• Daniel Traynor
• daniel wyler
• Daniele Fargion
• Daniele Martello
• Danuta Kiełczewska
• Dario Barberis
• David Khatidze
• David Miller
• David Miller
• David South
• David Straub
• Davor Palle
• Dawn Leslie
• Dean Andrew Hidas
• Dennis D. Dietrich
• Di Ciaccio Anna
• Di Ciaccio Lucia
• Dimitris Fassouliotis
• DIOP MANSOR
• Dipanwita Dutta
• Domenico ELIA
• Dominik Horn
• Donatella Cavalli
• Dorota Szuba
• DURMUS DEMIR
• Edmond Berger
• Eilam Gross
• Ekaterina Lipka
• Elena Aprile
• Elena Guardincerri
• Eli Ben-Haim
• Elina Berglund
• Elisa Guido
• Elzbieta Richter-Was
• Emiliano Molinaro
• Emily Thompson
• Enrique Palencia
• Eram Rizvi
• Eric Kajfasz
• Eric Prebys
• Erik Johansson
• Erika De Lucia
• Eun-Kyung Park
• Eunil Won
• Evelina Marinova
• Ewa Rondio
• Eyal Brodet
• Ezequiel Alvarez
• fabio anulli
• fabio happacher
• Fabio Zwirner
• Fabiola Gianotti
• Fatemeh Taghavi Shahri
• Fazal Fazal-e-Aleem
• Federico Nguyen
• Fei-Fan Lee
• Felicitas Pauss
• Felix Wick
• Ferruccio Feruglio
• Florent FAYETTE
• Florian Fraenkle
• Florian Haas
• Floriana Giannuzzi
• FLUBERT BOLOMIGUI
• Folkert Koetsveld
• Francesco Riggi
• FRANCISCO BOTELLA
• Francisco Fernandez
• Frank Wilczek
• Frank Zimmermann
• Freddy Cachazo
• fulvio piccinini
• Gabriella CATALDI
• GBAH ANNE
• George W.S. Hou
• Gergely Gabor Barnafoldi
• Gergo Hamar
• Gerhard Brandt
• Gholam Reza Boroun
• Giacomo Cacciapaglia
• Giancarlo Ferrera
• Gianluca Introzzi
• Gianluca Lamanna
• Gianmaria Collazuol
• Gideon Bella
• Giovanni Onorato
• Giovanni Punzi
• Giovanni Sabatino
• Giulio Pellegrini
• Goran Jarlskog
• Grazyna Nowak
• Grzegorz Brona
• Grzegorz Polok
• Grzegorz Wilk
• Guey-Lin Lin
• Guido Volpi
• Gustavo Branco
• Götz Gaycken
• Günther Geschonke
• Hans Bienlein
• Hans Peter Beck
• Hans-Peter Morsch
• Helmut Burkhardt
• Henri PESSARD
• Henryk Palka
• Henryk Wilczyński
• HERBERT ROHRINGER
• Herbst Michael
• Iacopo Vivarelli Vivarelli
• Ignacio Sevilla
• Ilya Kravchenko
• Imai Jen-La Plante
• Irina Nasteva
• isabelle ripp-baudot
• Isamu Nakamura
• Ivan Amos Cali
• Ivana Hristova
• Jacek Turnau
• Jacek Wosiek
• Jackson Wu
• James Brau
• James Catmore
• James Gray
• James Olsen
• Jan Balewski
• Jan Erik Sundermann
• Jan Figiel
• Jan Kalinowski
• Jan Kapitan
• Jan Kisiel
• Jan Kretzschmar
• Jan Morlock
• Jan Nassalski
• Jan Sobczyk
• Janet Dietrich
• Janusz Chwastowski
• Jared Yamaoka
• Jaroslav Cvach
• Jaroslaw Wiechczynski
• Jason Keller
• Jason Lee
• Jean-Francois Grivaz
• jean-pierre Vialle
• Jernej Kamenik
• Jesus Orduna
• Jim Virdee
• Jiri Chyla
• Joachim Mnich
• Joanna Stepaniak
• Joe Sato
• Joel Jones Perez
• Joerg Behr
• Johan Messchendorp
• Johann Collot
• John Conway
• John N Ng Ng
• Jolanta Brodzicka
• Jonatan Piedra
• Jonathan Burns
• Jonathan Butterworth
• Jonathan Debove
• Jorma Tuominiemi
• Jose Bernabeu
• Jose Ocariz
• jose penarrocha
• Jose Ramon Espinosa
• Josef Juran
• Joseph Conlon
• Joseph Haley
• Juan Pablo Fernández
• JUAN TERRON
• Julia Elizabeth Ruiz Tabasco
• Julia Velkovska
• Julia Vogel
• Julien Labbé
• Julius Omoniyi Ogunsola
• Junichi Tanaka
• Justin Albert
• Justin Evans
• K.K. Gan
• Kacper Zalewski
• Kamal Hussain Khan
• Karel Kolar
• Karim Trabelsi
• Karin Daum
• Karl-Heinz Kampert Kampert
• Karlheinz Meier
• Karol Kolodziej
• Karol Lang
• Karolis Tamosiunas
• Karsten Danzmann
• Katarzyna Grebieszkow
• Katarzyna Malek
• Katarzyna Wichmann
• Kathrin Egberts
• Katja Krueger
• Ken Sakashita
• Kim Vervink
• Kiyoshi Hayasaka
• Klaus Dehmelt
• Klaus Desch
• Klaus Honscheid
• Klaus Rith
• Krisztian Krajczar
• Krzysztof Fialkowski
• Krzysztof Graczyk
• Krzysztof Kurek
• Krzysztof Kutak
• Krzysztof Nowak
• Krzysztof Piotrzkowski
• Krzysztof Sliwa
• Krzysztof Turzynski
• Krzysztof Wozniak
• KWANG-CHANG LAI
• Lars Hofer
• Lars Sonnenschein
• Laura Patrizii
• Laurent Favart
• laurent schoeffel
• Lech Piotrowski
• Leonard Apanasevich
• Leonard Lesniak
• Leonardo Merola
• Lidia Goerlich
• Linacre Jacob
• Lorenzo Basso
• Lorenzo Bellagamba
• Luca Fiorini
• Lucia Masetti
• Ludwik Dobrzynski
• Luigi Tibaldo
• Lukman O Raheem
• Lydia Shcheglova
• Lyndon Evans
• Maciej Skrzypek
• Maciej Trzetrzelewski
• Magdalena Slawinska
• MAHILHET NIMY
• Mais Suleymanov
• Malamin Joof
• Malgorzata Kazana
• Manfred Krammer
• Marcello Rotondo
• Marcin Konecki
• Marcin Kucharczyk
• Marcin Wolter
• Marco Bochicchio
• Marco CARDACI
• Marco Dreucci
• Marco Gersabeck
• Marco van Leeuwen
• Marco Zagermann
• Marcus Ebert
• Marek Jezabek
• Marek Kowalski
• Marek Zralek
• Margarida Nesbitt Rebelo
• Maria Krawczyk
• Maria Rozanska
• Mariam Tórtola
• Marie-Helene Genest
• Marie-Helene Schune
• Mariusz Przybycien
• Mariusz Witek
• Mark Williams
• Marta Calvi
• Marta Luszczak
• Martin Vojik
• Masato Yamanaka
• Massimo Passera
• Matteo Cavalli-Sforza
• Matthias Mozer
• Maurizio Bonesini
• Maurizio Pierini
• MAURO DELL'ORSO
• Max Baak
• Maximiliano Sioli
• Michael Gustafsson
• Michael Mulhearn
• Michael Prouza
• Michael Sullivan Sullivan
• Michail Bachtis
• Michal Malinsky
• Michal Praszalowicz
• Michal Turala
• Michel Jaffré
• Michele Giunta
• Michele Weber
• Miguel Vidal
• Mikolaj Cwiok
• Mikolaj Misiak
• Min-Zu Wang
• Mirko Berretti
• Miroslav Myska
• Mitsuru Kakizaki
• Mohammed Sanduk
• Monica D'Onofrio
• Monica Turcato
• Monika Blanke
• Monika Szarska
• muge karagoz
• Muhammed Deniz
• Muhammed Deniz
• Murilo Rangel
• Mustapha MEKHFI
• Mykola Kolomiyets
• Myron Bander
• Natascha Hoermann
• Nathalie Besson
• Nele Boelaert
• Nello Paver
• Neus Lopez March
• Nicolas Kerschen
• NIKI SAOULIDOU
• Nikola Makovec
• Nikolay Skachkov
• Nils-Erik Bomark
• Nirmalya Parua
• Norbert Wermes
• Olaf Reimer
• Oleg Brandt
• Oleksandr Krasheninnikov
• Omar Miranda
• Otman CHARAF
• Pablo G. Camara
• Pablo Garcia Ortega
• Panos Christakoglou
• Paolo Azzurri Azzurri
• Paolo Francavilla
• Paolo Gauzzi
• paolo giubellino
• Patricia Conde Muíño
• Patrick Lukens
• Patrizia CENCI
• Patrizia de Simone
• Paul de Jong
• Paul Hoyer
• Paul Hunt
• Paul Kooijman
• Paul Newman
• Paula Eerola
• Pavel Weber
• Pavol Strizenec
• Pawel Bruckman de Renstrom
• Pawel Malecki
• Pawel Staszel
• Paweł Karbowniczek
• Paweł Pachołek
• Pedro Ferreira da Silva
• Per Jonsson
• Per OSLAND
• Peter Buchholz
• Peter Levai
• Peter Marquard
• Peter Renkel
• Peter Schleper
• Petr Travnicek
• Philip Burrows
• Philipp Kant
• Philippe BLOCH
• Philippe Miné
• Phillip Gutierrez
• Pierre Astier
• Pierre Lutz
• Pierre VILAIN
• Pietro Biassoni
• Pietro Cortese
• Pietro Slavich
• Piotr Bozek
• Piotr Chankowski
• Piotr Czerski
• Piotr Kotko
• Piotr Lebiedowicz
• Piotr Malecki
• Piotr Morawski
• QINGJUN XU
• Rafał Gazda
• RAKESH TEJA KONDURU
• Ranko Ostojic
• Raoul De Rooij
• Reinhard Schwienhorst
• Reinhold Rückl
• Remi Louvot
• Renato Guedes
• Ricardo Marco-Hernández
• Riccardo Brugnera
• Richard Kass
• Rita De Masi
• Rob Edgecock
• Robert Ciesielski
• Robert Kaminski
• Robi Peschanski
• Robin Erbacher
• Roger Barlow
• Roland Waldi
• Rolf Heuer
• Roman Pasechnik
• Romuald Janik
• Rupert Leitner
• Sabyasachi Roy
• Salvatore Rappoccio
• Samuel Wallon
• Sandor Katz
• Sandro Palestini
• Sandro Uccirati
• Sara Borroni
• Satoshi Mishima
• Sebastien GREDER
• Sergio Bertolucci
• Shahram Rahatlou
• Shan JIN
• Sheldon Stone
• Shohei Nishida
• Shuangshi Fang
• Silvia Ochesanu
• Simon Eidelman
• simone gennai
• Sookyung Choi
• Sophie Trincaz-Duvoid
• Stanislaw Mikocki
• Stefan Antusch
• Stefan Pokorski
• Stefania Ricciardi
• steve playfer
• Sunghyon Kyeong
• Sébastien Descotes-Genon
• Tae Min Hong
• Takaaki Nomura
• Takashi Shimomura
• Tara Shears
• Teh Lee Cheng
• Teresa Rodrigo
• Themis Bowcock
• THIERNO MBAYE
• Thomas Grimm
• Thomas Latham
• Thomas Lohse
• Thomas Nunnemann
• Thorsten Lux
• Thorsten Renk
• Timothy Nnwaze
• Tobias Hurth
• Tobias Winchen
• TOCHUKWU IJEOMA
• Tom Ferbel
• Tomasz Palczewski
• Tomasz Skwarnicki
• Tord Ekelof
• Torsten Dahms
• Toyoko Orimoto
• Tricomi Alessia
• Tuula Maki
• Ueli Straumann
• Ulrich Husemann
• Urs Achim Wiedemann
• Valentin Kozlov
• Valerio Vercesi
• Valeriy Dvoeglazov
• Vera Beillet-Kovalenko
• Verena Schoenberg
• Veronique Ziegler
• Viatcheslav Valuev
• Vicente Lacuesta
• Viktor Pec
• Vincenzo Canale
• Vincenzo Cavasinni
• Vincenzo CHIOCHiA
• Vincenzo Flaminio
• Vincenzo Lombardo
• Vitaliy Dodonov
• Viviana Cavaliere
• Volker Buescher
• Volodymyr Aushev
• Walter Van Doninck
• Waseem Bari
• Wenbin QIAN
• Wieslaw Placzek
• Wilfried Buchmuller
• Wojciech Slominski
• Wolfgang Altmannshofer
• Wolfgang Dungel
• Wolfgang Schäfer
• Xavier Janssen
• Yoshiyuki Miyazaki
• Yutaka Ushiroda
• Yves Sirois
• Yvonne Peters
• zbigniew.was@cern.ch Was
• Zdenek Dolezal
• Zeeshan Ahmed
• Zhiqing Philippe Zhang
• ZOLTAN KUNSZT
• Zoltan Nagy
• Zygmunt Lalak
Contact
• Thursday, July 16
• 9:00 AM 6:15 PM
I. Astroparticle Physics Middle Lecture Hall B

### Middle Lecture Hall B

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
• 9:00 AM
Probing the eV-mass range for solar axions with the CAST experiment 15m
The CERN Axion Solar Telescope (CAST) is searching for solar axions, which could be produced in the core of the Sun via the so-called Primakoff effect. For this purpose, CAST uses a decommissioned LHC prototype magnet. In its magnetic field of 9 Tesla axions could be reconverted into X-ray photons. The magnet is mounted on a structure built to follow the Sun during sunrise and sunset for a total of about 3 hours per day. The analysis of the data acquired during the first phase of the experiment with vacuum in the magnetic field region yielded the most restrictive experimental upper limit on the axion-to-photon coupling constant for axion masses up to about 0.02 eV. In order to extend the sensitivity of the experiment to a wider mass range, the CAST experiment continued its search for axions with helium in the magnet bores. In this way it is possible to restore coherence for larger masses. Changing the pressure of the helium gas enables the experiment to scan different axion masses. In the first part of this second phase of CAST, helium-4 has been used and the axion mass region was extended up to 0.4 eV. Therefore the experiment enters the regions favored by axion models. In CAST’s ongoing helium-3 phase the studied mass range is now further extended. We will present the final results of CAST’s helium-4 phase. Furthermore the latest upgrades of the experiments will be shown and an outlook on CAST’s status and prospects will be given.
Speaker: Mrs Julia Vogel (Albert-Ludwigs-Universität Freiburg)
• 9:15 AM
Recent Results from WIMP-search analysis of CDMS-II data 15m
The Cryogenic Dark Matter Search experiment (CDMS-II), operated at Soudan Underground Laboratory, employs an array of germanium and silicon low-temperature particle detectors to identify nuclear recoils from elastic scattering of Weakly Interacting Massive Particles (WIMPs). These detectors record the phonon and ionization depositions of each particle impact, data which are used to discriminate WIMP candidates from electromagnetic background. CDMS-II has been operating with its full complement of detectors since October 2006, and has already published a world-leading limit on WIMP interactions from the first portion of this data set. I will present the current results of this search, including the status of our newest blind analysis of data acquired from July 2007 through September 2008.
Speaker: Mr Zeeshan Ahmed (Caltech)
• 9:30 AM
EDELWEISS-2 Dark Matter Search: recent results with new detectors 15m
The existence of dark matter (DM) has strong support today while its nature remains one of the big science quests. EDELWEISS-2 is a direct DM search experiment using cryogenic Germanium bolometers. The most promising DM candidate, a so-called weakly interacting massive particle, WIMP, is expected to scatter off the target nuclei thus depositing a tiny energy in the detectors. A powerful event selection and good background knowledge are of crucial importance in this case. The experiment is situated in the French-Italian Fréjus tunnel, in the Modane underground laboratory LSM with a shielding of 4800m.w.e. against cosmic rays. Since the end of 2007, EDELWEISS is taking data. The status of the experiment and the latest results will be presented. Special emphasis will be given on the performance of recently developed detectors. These detectors show a significantly improved beta/gamma rejection power and provide a promising base for next generation direct DM searches. In addition, the identification of muon-induced background events and special measurements of muon-induced neutrons will be discussed.
Speaker: Dr Valentin Kozlov (Forschungszentrum Karlsruhe)
• 9:45 AM
Limits on Low-Mass WIMP Dark Matter with an Ultra-Low-Energy Germanium Detector at 220 eV Threshold 15m
An energy threshold of (220+-10) eV was achieved at an efficiency of 50% with a four-channel ultra-low-energy germanium detector [1] with a total active mass of 20 g. This provides a unique probe to WIMP dark matter with mass below 10 GeV. With low background data taken at the Kuo-Sheng Laboratory, limits on WIMPs in the galactic halo were derived for both spin-independent and spin-independent couplings down to WIMP mass of 3 GeV [2]. This detector technique makes the unexplored sub-keV energy window accessible for new neutrino and dark matter experiments [1]. Status on data taking and analysis on a 500-g point-contact germanium detector will be reported. References: 1.H.T. Wong, Mod. Phys. Lett. A 23, 1431 (2008). 2.S.T. Lin et al., Phys. Rev. D 76, 061101(R) (2009) .
Speaker: Dr Muhammed Deniz (Instructor)
• 10:00 AM
Status of the XENON100 experiment for WIMP direct detection 15m
The XENON100 experiment aims to directly detect cold dark matter particles via their elastic collisions with Xenon nuclei. On this purpose a ultra-low background double phase (liquid-gas) xenon filled time projection chamber with a total mass of 170 kg (70 in the target region and 100 kg in the active shield) has been installed at the Gran Sasso Underground Laboratory and is currently taking calibration data. In this talk the background predictions based on Monte Carlo simulations with input from screening of detector and shield materials will be presented. Moreover the design and performance of the detector and its associated systems, based on the calibration runs will be also presented.
Speaker: Dr Alfredo Davide Ferella (University of Zurich (UZH))
• 10:15 AM
coffee break 45m
• 11:00 AM
Latest results from the Pamela experiment 25m
The PAMELA apparatus has been launched in space on June 15, 2006 on the Russian Resurs DK1 satellite, and is continuously taking data since July 2006. The experiment is devoted to the precise and extensive measurements of cosmic ray in space, with main focus on the antiprotons and positrons in the 100 MeV/200 GeV energy range. Primary protons, electrons and light nuclei spectra are also precisely measured, and many solar physics and geomagnetic related aspects can be investigated with high statistics and long time exposure. This talk will present the latest analysis of the PAMELA data, with particular emphasis on the antiproton/proton and positron/electron ratio.
Speaker: Prof. Oscar Adriani (University of Florence and INFN Florence)
• 11:25 AM
Observations of High Energy Cosmic Ray Electrons by the ATIC Balloon Experiment 25m
Recently the Advanced Thin Ionization Calorimeter (ATIC) balloon experiment reported observations of high energy cosmic ray electrons over the energy range 300 to 800 GeV, indicating a feature in the otherwise smoothly decreasing energy spectrum. ATIC has had three successful high altitude flights over the continent of Antarctica 2000-2001, 2002-2003 and 2007-2008. During this talk we will discuss the ATIC experiment, the electron observations (including preliminary results from the most recent ATIC flight), examine the merits of the various source models and compare the ATIC observations with other recent measurements.
Speaker: Prof. Jin Chang (Purple Mountain Observatory)
• 11:50 AM
The first year of Fermi LAT: a new light on the high-energy Universe 25m
For almost one year the Large Area Telescope on board the Fermi observatory has been surveying high-energy phenomena in our Universe. We will present an overview of the status of the mission and of some results from the first year of observations: detection of high-energy gamma-ray bursts, the discovery of new populations of gamma-ray sources, measurement of the cosmic-ray electron spectrum up to 1 TeV and non-confirmation of the excess of diffuse GeV gamma-ray emission seen by EGRET.
Speaker: Mr Luigi Tibaldo (INFN Padova)
• 12:15 PM
The cosmic-ray electron spectrum measured with H.E.S.S. 25m
The measurement of very-high-energy cosmic-ray electrons is intrinsically difficult due to their very steep spectrum with low fluxes and an enormous background of hadronic cosmic rays. The large collection areas needed for such a measurement can be provided by ground-based imaging atmospheric Cherenkov telescopes. The High Energy Stereoscopic System (H.E.S.S.) has performed the first ground-based cosmic-ray electron measurement and thereby extended the measured range of the spectrum to several TeV. Here the H.E.S.S. measurement is presented, as well as an extension of the H.E.S.S. spectrum towards lower energies. At these energies, H.E.S.S. can probe recent ATIC measurements, which have been interpreted in terms of dark matter scenarios.
Speaker: Dr Kathrin Egberts (Max-Planck-Institut fuer Kernphysik, Heidelberg)
• 12:40 PM
lunch break 1h 50m
• 2:30 PM
Cosmic Ray Signatures from Decaying Gravitino Dark Matter. 15m
If R-Parity is broken, a Gravitino LSP can still act as Dark Matter due to the Planck scale suppression of the decay width. Within this framework, we study cosmic ray signatures of models with trilinear R- Parity Violating couplings. The signals are compared with cosmic ray measurements from PAMELA and Fermi/LAT. It is shown that leptonic operators (LLE) can successfully reproduce the electron/positron anomalies seen by PAMELA and Fermi. Moreover, the absence of any deviation from expected background in the PAMELA anti-proton data is shown to produce significant constraints on LQD and UDD couplings. Finally, we discuss the importance of upcoming photon data on resolving the source of these anomalies.
Speaker: Mr Nils-Erik Bomark (University of Bergen)
• 2:45 PM
PAMELA and Fermi-LAT data as backgrounds for future dark matter searches 15m
The recent data from PAMELA and Fermi-LAT can be interpreted as evidence of new astrophysical sources of high energy positrons. In that case, such astrophysical positrons constitute an additional background against the positrons from dark matter annihilation. In this paper, we study the effect of that background on the prospects for the detection of a positron dark matter signal in future experiments. In particular, we determine the new regions in the (mass, sigmav) plane that are detectable by the AMS-02 experiment for several dark matter models. In spite of the larger background, we find that these regions are not that different from those obtained for the conventional background model. That is, an astrophysical explanation of the present data by PAMELA and Fermi-LAT implies that the detection of positrons from dark matter annihilation is only slightly more challenging than previously believed.
• 3:00 PM
First measurements with the ANTARES detector 15m
The present status of the ANTARES detector is given. The experience of building and running a deep sea neutrino detector in the Mediterranean sea is reviewed. The first neutrino flux limits from astrophysical sources determined by ANTARES are presented. These limits are the most stringent limits to date for the sources in the southern sky, despite being determined in less than half a year data taking with a detector consisting of only five of the final twelve detector lines. The measured downward going muon flux agrees well with previously published experimental data. Finally a look at the first data from the full detector will be given.
Speaker: Prof. Paul Kooijman (Univ. of Amsterdam/Univ. Utrecht/Nikhef)
• 3:15 PM
Results from IceCube 15m
The cubic kilometer neutrino telescope IceCube at South Pole has begun the 3rd season of data-taking with meanwhile almost 0.75 cubic kilometers of instrumented ice volume. The cubic kilometer neutrino telescope IceCube at South Pole has begun the 3rd season of data-taking with meanwhile almost 0.75 cubic kilometers of instrumented ice volume. The talk sketches the project status and gives examples of recent results: The search for astrophysical neutrinos and for neutrinos from dark matter annihilation, the study of cosmic rays, and particle physics results from a study of neutrinos generated in the Earth atmosphere. talk sketches the project status and gives examples of recent results: The search for astrophysical neutrinos and for neutrinos from dark matter annihilation, the study of cosmic rays, and particle physics results from a study of neutrinos generated in the Earth atmosphere.
Speaker: Dr Christian Spiering (DESY)
• 3:30 PM
The KM3NeT project: Towards a km^3-scale neutrino telescope in the Mediterranean Sea 15m
In recent decades we have gained a tremendous amount of knowledge on our Universe. However, up to now astronomical observations have been restricted to the electromagnetic spectrum. The detection of cosmic high-energy neutrinos (>~ 1 TeV) will complement the information from these observations and at the same time provide completely new insights. The low interaction probability, which renders neutrinos perfect cosmic messengers, also poses a large challenge for their detection. Calculations indicate that neutrino telescopes of km^3-scale are necessary to detect neutrino fluxes from Galactic or extra-Galactic objects such as supernova remnants or gamma-ray bursts which are thought to produce neutrinos up to the PeV scale. KM3NeT, which is currently in the design phase, targets to instrument at least one km^3 of deep-sea water in the Mediterranean Sea, its field of view complementing the IceCube neutrino telescope at the South Pole and exceeding it in sensitivity by a substantial factor. The presentation reports on the current status of the KM3NeT project and on possible solutions for the various technical challenges encountered when building an off-shore detector in water depths of several kilometers. It will also discuss first estimates of the expected sensitivity of the detector for different source classes.
Speaker: Mr Alexander Kappes (ECAP, University Erlangen-Nuremberg)
• 3:45 PM
Determination of the Neutrino Flavor Ratio at the Astrophysical Source 15m
We discuss the reconstruction of neutrino flavor ratios at astrophysical sources from future neutrino-telescope measurements, given the knowledge of neutrino mixing angles obtained from terrestrial experiments. With a statistical analysis, we demonstrate that the pion source and the muon-damped source can be distinguished at the $3\, \sigma$ level provided the accuracies on measuring $R\equiv\phi (\nu_{\mu})/\left(\phi (\nu_{e})+\phi (\nu_{\tau})\right)$ and $S\equiv\phi (\nu_e)/\phi (\nu_{\tau})$ can both reach $10\%$. On the other hand, the above two sources are very difficult to distinguish by merely measuring $R$ alone. We also discuss the effect of leptonic CP phase on such a flavor-ratio reconstruction.
Speaker: Prof. Guey-Lin Lin (National Chiao-Tung University)
• 4:00 PM
coffee break 30m
• 4:30 PM
Vertical Array in Space for Horizontal Air-Showers 15m
The detection of vertical High Energy Cosmic Rays is blurred in ground arrays by Coulomb spread of air-shower secondaries. These showers grows in a well knon conic random tree. High Altitude horizontal airshowers are totally different: the low air density allows the spread of the shower in a thin fan-like shape of huge lenghts. Their arrival angle at horizons select, in a fine- tuning, their slath-depth and energy ; their shower distances inferr their primary compositions. Electron pair fingers opens in a wide forked tails differently on Earth: At geomagnetic equator the spread is vertical while at Poles the fan spread are horizontally tangent to the Earth atmosphere. At equator long array of element from balloons or satellites may reveal the thin twin spread of HECR skimming showering. Below the Earth edge, rarest but significant EeV tau air-shower may finally reveal the UHE GZK (few EeV ) tau neutrino whose skimming tau are escaping and decaying from Earth edge in high quotas air.
Speaker: Prof. Daniele Fargion (Physics Depart. and INFN, Rome1)
• 4:45 PM
GeoSynchrotron Radiation from Earth Skimming Tau Neutrino Shower 15m
The origins of the ultra-high energy cosmic rays remain a fundamental and unsolved problem in astroparticle physics. Promising clues could be provided by the associated high energy neutrinos since they would neither interact with intergalactic or interstellar media nor be deflected by the magnetic fields. Various detectors have been proposed for detecting high energy neutrinos. Some of them rely on measuring the air shower by the so-called earth-skimming $\nu_\tau$, for which horizontal showers are generated by the ensuing $\tau$ decay. Using CORSIKA to simulate the tau decay induced air shower, we extract universal particle energy and lateral distribution. We then calculate the synchrotron radiation from tau decay showers of $10^{16.5}$ eV $\sim 10^{18.5}$ eV energies by adapting the "Coherent Geosynchrotron Radiation" model proposed by Huege and Falcke 2003. Taking into account in detail the conversion from tau neutrinos to tau leptons and the detection efficiency of the designed antennae, we estimate the expected tau neutrino event rate for an integrated tau neutrino flux $\phi_{\nu_\tau}\sim \, 10^{-17}{\rm cm}^{-2}{\rm s}^{-1}{\rm sr}^{-1}$ above $10^{18}\, {\rm eV}$.
Speaker: Dr KWANG-CHANG LAI (Institute of Physics, National Chiao Tung University)
• 5:00 PM
Studies of the ultra-high energy cosmic ray composition at the Pierre Auger Observatory 15m
The hybrid Pierre Auger Observatory, consisting of fluorescence detector with 24 telescopes and of surface detector with more than 1600 water Cherenkov stations, has been collecting quality data since January 2004. In this contribution we present current results of studies of ultra-high energy cosmic ray composition. The depth of maximum of air showers determined using fluorescence telescopes and the magnitude of the fluctuations of this maximum depth are reported as functions of energy. The mass composition is then derived from these data using modern hadronic interaction models, and subsequently the contraints are given on the parameters of the hadronic interactions in the ultra-high energy region. These results are also compared with the observables obtained independently from the surface array of water Cherenkov detectors, which are also sensitive to the mass composition, in particular with a risetime of the signals and with azimuthal assymetries of the time distributions. Finally, we also briefly discuss the new limits on the flux of ultra-high energy photons and of diffuse ultra-high energy neutrinos, and we investigate the impact of these limits on top-down models of cosmic rays origin.
Speaker: Michael Prouza (Institute of Physics, Prague, Czech Republic)
• 5:15 PM
Results from the ARGO-YBJ experiment 15m
The ARGO-YBJ detector at the YangBaJing Cosmic Ray Laboratory (4300 m a.s.l., Tibet, P.R. China) has been put into operation since November of 2008. It is the first EAS detector combining a very high mountain altitude with a full coverage detection surface. The high time-space granularity combined with the full coverage make ARGO-YBJ a unique device to study the EAS characteristics. In this paper we report a few selected results in Gamma-Ray Astronomy and Cosmic Ray Physics.
Speaker: Dr Daniele Martello (Dip. of Physics and INFN - Lecce (Italy))
• 5:30 PM
"Pi of the Sky": modelling of the detector response for more effective search for optical GRB counterparts. 15m
"Pi of the Sky" is a robotic telescope project aiming for continuous observation of a large part of the sky with high temporal and optical resolution using wide field-of-view CCD cameras. Its primary goal is to look for optical afterglows associated with the gamma ray bursts (GRB), but it is also well suited to study any kind of short timescale astrophysical phenomena. The prototype apparatus with two cameras has been installed at Las Campanas Observatory in Chile in 2004. Most significant observations, including extraordinarily bright prompt optical emission of GRB 080319B are biefly discussed. A wide field-of-view CCD cameras suffer from large image distortion effects. Dedicated setup has been designed and built for detailed laboratory studies of the camera's behaviour, including point-spread-function (PSF) and CCD sensitivity measurements. The aim of the study is to prepare realistic model of the detector response, which would help to understand the detector performance in more details and to improve measurement precision.
Speaker: Lech Wiktor Piotrowski (University of Warsaw)
• 5:45 PM
Measurement of the cosmic muon charge asymmetry 15m
In late 2008, CMS collected 300 million events from atmospheric cosmic ray muons in a dedicated long run, with the full detector operational, assembled in the P5 experimental area at LHC. Using these data, CMS has measured the charge asymmetry of cosmic muons, as a function of the muon momentum, from 10 GeV/c up to the Tev/c scale. While the analysis of cosmic muons is not part of the physics program of CMS, it provides high quality measurements that assess the expected performance of the CMS detector, from the data taking to the reconstruction and analysis software. This is the first physics result of the CMS experiment.
Speaker: Dr Jonatan Piedra (University of Florida)
• 6:00 PM
ArDM, a 1t liquid argon detector for dark matter searches 15m
We are assembling a 1t liquid argon detector at CERN using the two-phase technique to detect both charge and luminescence produced by recoil nuclei from WIMP interactions. We have investigated background suppression capabilities and impurity effects in argon using the scintillation light and its decay time. We are studying ways to efficiently collect and detect the VUV-light to reach a detection threshold of 30 keV in a large liquid argon detector, and to efficiently suppress background from neutrons and electrons. First results for the light collection efficiency in the 1t detector will be presented.
Speaker: Prof. Claude Amsler (University of Zurich)
• 9:00 AM 6:00 PM
II. Flavour Physics Large Lecture - Hall A

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
• 9:00 AM
Status of the CKM matrix as of Summer 2009 and sensitivity to New Physics 15m Large Lecture - Hall A

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
We summarise the current status of the Cabbibo-Kobayaski-Maskawa matrix describing mixing and CP violation in the quark sector. We review the main ingredients of the global CKM analysis, with an emphasis on recent results and their impact. We assess the compatibility between various sources of information. We discuss the role of theoretical and experimental uncertainties. We use current data to analyse scenarios of potential deviations from the flavour sector in the Standard Model, by setting constraints on additional effective parameters accounting for possible New Physics effects.
Speaker: Jose Ocariz (Universite Paris Diderot and IN2P3)
• 9:15 AM
Update of the Unitarity Triangle Analysis 15m Large Lecture - Hall A

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
We present the update of the Unitarity Triangle (UT) analysis within the Standard Model (SM) and beyond. Within the SM, combining the direct measurements on sides and angles, the UT turns out to be overconstraint in a consistent way, showing that the CKM matrix is the dominant source of flavour mixing and CP-violation and that New Physics (NP) effects can appear at most as small corrections to the CKM picture. Generalizing the UT analysis to investigate NP effects, constraints on b -> s transitions are also included and both CKM and NP parameters are fitted simultaneously. While no evidence of NP effects is found in K- \bar K and Bd-\bar Bd mixing, in the Bs- \bar Bs mixing an hint of NP is found. The UT analysis beyond the SM also allows us to derive bounds on the coefficients of the most general DeltaF = 2 effective Hamiltonian, that can be translated into bounds on the NP scale.
Speaker: Dr Cecilia Tarantino (University Roma Tre)
• 9:50 AM
Measurements of charmless B decays related to alpha at BABAR 20m Large Lecture - Hall A

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
Speaker: Dr Vincenzo Lombardo (INFN Milano)
• 10:10 AM
CP violation in hadronic penguin modes 20m Large Lecture - Hall A

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
Speaker: Dr Eli Ben-Haim (LPNHE-Paris)
• 10:30 AM
coffee break 30m main holl (Kraków, Poland)

### main holl

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
• 11:00 AM
CPV and CPT in B0 decays at Belle 15m Large Lecture - Hall A

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
Measurement of $\phi_3$ with a Dalitz Plot Analysis of $B^+ \to D^{(*)}K^+$ Decay We present an update of the measurement of the unitarity triangle angle $\phi_3$ using a Dalitz plot analysis of three-body neutral D decays from $B \to D^{(*)}K$ process. The results are based on a large sample of $B\bar{B}$ decays recorded at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB $e^+e^-$ collider. Measurement of CPT Violating Parameter CPT is expected to be a fundamental symmetry with no significant deviations. Nonetheless we can introduce an artificial perturbation parameter to the $B^0-\bar{B}^0$ mixing system that violates CPT symmetry. The CPT violating parameter, which is a complex number but expected to be zero, can be probed through proper time difference distributions in correlated B meson pair decays. We present a measurement of the CPT violating parameter using a large data sample collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB energy-asymmetric $e^+e^-$ collider. Measurement of $CP$-violating Parameters in the $B\to K_S^0 K^+ K^-$ Time-dependent Dalitz Plot Analysis We present a measurement of $CP$-violating parameters in the $B^0$ decays with $K_S^0 K^+ K^-$ final state including $B^0 \to \phi K_S^0$ using a time-dependent Dalitz plot analysis. The results are based on a large data sample of $B \bar{B}$ pairs collected on the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^{+}e^{-}$ collider. Improved measurement of $CP$ asymmetries in $B^0 \to (c\bar{c}) K^0$ decays We present results on time-dependent $CP$ asymmetries in the $B$ decays to neutral charmonium final states using a large dataset collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider.
Speakers: Anton POLUEKTOV (University of Warwick / Budker INP), Dr Anton Poluektov (Warwick / BINP)
• 11:15 AM
Resolution of the B -> pi pi, pi K puzzles 15m Large Lecture - Hall A

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
We show that there exist uncanceled soft divergences in the k_T factorization for nonfactorizable amplitudes of two-body nonleptonic B meson decays, similar to those identified in hadron-hadron collisions. Viewing the special role of the pion as a q-qbar bound state and as a pseudo Nambu-Goldstone boson, we associate a soft factor with it in the perturbative QCD formalism. This soft factor enhances the nonfactorizable color-suppressed tree amplitudes, such that the branching ratios B(B->pi^0 pi^0) and B(B->pi^0 rho^0) are increased under the constraint of the B(B->rho^0 rho^0) data, the difference between the direct CP asymmetries A_{CP}(B->pi^\mp K^\pm) and A_{CP}(B->pi^0 K^\pm) is enlarged, and the mixing-induced CP asymmetry S_{pi^0 K_S} is reduced. That is, the known B->pi pi and B->pi K puzzles can be resolved simultaneously.
Speaker: Dr Satoshi Mishima (DESY)
• 11:30 AM
Measurements of CP violation and CKM matrix at LHCb 15m Large Lecture - Hall A

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
Speaker: Prof. Marta Calvi (University Milano Bicocca)
• 11:45 AM
SU(3) Flavour Symmetries and CP Violation 15m Large Lecture - Hall A

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
In order to satisfy current FCNC and CP violation bounds, SUSY flavour structures cannot be generic. An interesting solution to these SUSY Flavour and CP Problems lies on the use of an SU(3) family symmetry which spontaneously breaks CP symmetry. Typical observables of such a model are electric dipole moments and LFV processes. In addition, these models can give contributions to CP violation in neutral kaon decay. We show how the latter can be used to restrict the allowed SUSY parameter space, and induce correlations between LFV and EDM predictions.
Speaker: Mr Joel Jones Perez (Universitat de Valencia)
• 12:00 PM
Probing the MSSM flavor structure with low energy CP violation 15m Large Lecture - Hall A

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
We present a systematic study of the low energy phenomenology of CP violation in b->s transitions within the MSSM. Allowing for the presence of new sources of CP violation, we discuss the Minimal Flavor Violation framework, scenarios with generic new flavor structures in the soft SUSY breaking sector and also setups where the quark and squark masses are determined by underlying flavor models. In particular, we address the question how large the New Physics contribution to CP violation in Bs mixing can be and we outline strategies to disentangle among the different SUSY scenarios by means of a correlated analysis of both DeltaF=1 and DeltaF=2 low energy observables.
Speaker: Mr Wolfgang Altmannshofer (TU Munich)
• 12:15 PM
B-CP anomalies, “4th generation" and the LHC 15m Large Lecture - Hall A

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
Although the CKM-paradigm works to an accuracy of ~20%, there are by now several indications that suggest the need for beyond the Standard Model CP-odd phase(s). The value of sin 2β measured via the goldplated (tree) mode, B → ψK s is smaller than the value deduced by using improved lattice matrix elements. The value of sin 2β measured via ‘penguin-dominated’ (loop) decays tends to be even smaller still. There is also a rather large difference between the direct CP asymmetries in → K − π + and B − → K − π 0 that is rather difficult to understand. More recently, CDF and D0 are finding about a 2.2σ signal in CP asymmetry in the corresponding gold-plated mode B s → ψϕ. If true, this would be consistent with the indications of new CP-phase in penguin b → s transitions seen at B-factories. A brief discussion of some of the BSM scenarios that could be the underlying cause of these deviations is given. In particular, we emphasize that the data are quite suggestive of a fourth family with m′ t in the range of 400–600 GeV as perhaps the simplest BSM candidate which ‘naturally’ explains the data. This picture leads to significant repercussions for the LHC which will be explored.
Speaker: Amarjit Soni (Brookhaven National Lab)
• 12:30 PM
lunch break 2h Large Lecture - Hall A (Kraków, Poland)

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
• 2:30 PM
Bs decays at Belle 20m Large Lecture - Hall A

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
Observation of $B_s \to J/\psi \eta$ and Search for $B_s \to J/\psi \eta'$ We report the first observation of the $CP$ eigenstate decay $B_s \to J/\psi \eta$ and a search for the decay $B_s \to J/\psi \eta'$. The results are based on 23.6~fb$^{-1}$ of data collected at the $\Upsilon(5S)$ resonance with the Belle detector at the KEKB asymmetric $e^+ e^-$ collider. Search for $B_{s} \to hh$ decays We present a study of $B_{s} \to h h$ decays, where $h$ stands for charged or neutral $K$ or $\pi$. These results are obtained from a data sample collected on the $\Upsilon(5S)$ resonance with the Belle detector at the KEKB asymmetric energy $e^+ e^-$ collider. Measurement of ${\cal B}(B_s \to D_s^{(*)+}D_s^{(*)-})$ and Estimate of $\Delta \Gamma_{CP}$ We report a measurement of the branching fractions for the decays $B_s \to D_s^{(*)+}D_s^{(*)-}$ using a large data sample collected at the $\Upsilon(5S)$ resonance with the Belle detector at the KEKB asymmetric energy $e^+ e^-$ collider. In the heavy quark limit, this branching fraction is directly related to the width difference between the $CP$-odd and $CP$-even $B_s$ states. Observation of $B_s\to D_s^{*-}\pi^+$ and $B_s\to D_s^{(*)-} \rho^+$ at Belle The large data sample being recorded with the Belle detector at the $\Upsilon$(5S) energy provides a unique opportunity to study the poorly-known $B_s$ meson. Following our recent measurement of $B_s \to D_s\pi$ in a sample of 23.6~fb$^{-1}$, we extend the analysis to include decays with photons in the final state. Using the same sample, we report the first observation of three other exclusive $B_s$ decays with large branching fractions, $B_s\to D_s^{*-}\pi^+$, $B_s \to D_s^{-}\rho^+$ and $B_s \to D_s^{*-}\rho^+$ . Search for Baryonic Decays of $B_s$ We report results from a study of $B_s^0$ meson baryonic decays at Belle. We search for $\bar B_s^0 \to \Lambda_c^+ \pi^- \bar \Lambda$, $\bar B_s^0 \to p K^- \bar\Lambda$, $\bar B_s^0 \to \Sigma_c^0 \bar{p} K^+$, and $\bar B_s^0 \to \Lambda_c^+ \pi^- \bar{p} K^+$ modes. The analysis is performed using a large sample of data at the $\Upsilon$(5S) energy collected with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider.
Speaker: Remi Louvot (École Polytechnique Fédérale de Lausanne (EPFL))
• 2:50 PM
Study of CP violation in Bs -> J/psi phi decays at CDF 15m Large Lecture - Hall A

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
The first measurement of CP violation phase beta_s in Bs -> J/psi phi decays in 2007 generated considerable interest. The interest was caused by the small deviation from the SM. While not sufficiently significant, together with other measurements it is suggestive of a possible new physics contribution. In the subsequent update using 2.8 fb-1 of data collected by CDF II detector deviation from the SM further increased. We present latest CDF results on the mean decay width Gamma_s and CP violating phase beta_s, based on an angular- and time-dependent analysis of the Bs -> J/psi phi decays, including determination of the flavor of the Bs meson at production time.
Speaker: Mr Jan Morlock (University of Karlsruhe)
• 3:05 PM
Study of Decays Bd to J/psi K* and Bs to J/psi phi whith the D0 detector 15m Large Lecture - Hall A

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
Speaker: Prof. Phillip Gutierrez (University of Oklahoma)
• 3:20 PM
Study of Bs → Ds+(*) Ds-(*) and Bs → phi phi Decays at CDF II 15m Large Lecture - Hall A

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
Under certain theoretical assumptions, the branching fraction of Bs → Ds+(*) Ds-(*) is directly sensitive to the relative decay width difference DeltaGamma_CP/Gamma in the Bs system, which is predicted to be sizable in the standard model. Using approx. 4 fb-1 of data collected by the CDF II detector at the Tevatron ppbar collider, we are currently performing an exclusive selection of Bs → Ds+(*) Ds-(*) signal candidates in several hadronic modes. In contrast to former branching fraction measurements of this decay, we will be able to disentangle Bs → Ds+(*) Ds-(*) and measure the branching fractions of Bs → Ds+ Ds-, Bs → Ds+* Ds-, and Bs → Ds+* Ds-* separately. Yet another interesting mode is the decay of the Bs into a phi pair: this is a vector-vector decay dominated by b→sss penguin transition which is a sensitive probe for possible new physics effects. The only existing sample of this mode was reconstructed by the CDF experiment from 0.2 fb-1 of data, and consisted of only 8 signal events. Here we present new results based on a clean sample of about 300 Bs → phi phi decays reconstructed by the CDF II detector in a dataset with an integrated luminosity of about 3 fb-1.
Speaker: Mr Dominik Horn (University of Karlsruhe)
• 3:35 PM
CP-conserving and CP-violating properties in semileptonic Bs decays with the D0 experiment 15m Large Lecture - Hall A

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
A search for CP violation has been performed in a sample of semileptonic Bs decays corresponding to approximately 5 fb^-1 of data collected by the D0 detector in Run II at the Fermilab Tevatron collider. A time-dependent fit to the distributions of Bs candidates yields the flavour-specific asymmetry as_fs = [-1.7 pm 9.1 (stat) +1.2-2.3 (syst)] x 10^-3, corresponding to the most precise measurement to date for this CP violation parameter. Furthermore a search for the semi-inclusive process Bs to Ds(*)Ds(*) has been performed on a data sample of 2.8fb^-1. 26.6 pm 8.4 signal events are observed with a significance of 3.2 standard deviations above background, leading to a branching ratio of 0.035 pm 0.010 (stat) pm 0.011 (syst). Under certain theoretical assumptions, these double-charm final states saturate CP-even eigenstates in the Bs decays, resulting in a width difference of DeltaGamma_s(CP)/Gamma_s = 0.072 pm 0.021 (stat) pm 0.022 (syst).
Speaker: Dr Lars Sonnenschein (RWTH Aachen IIIA)
• 3:50 PM
A Study of Large $\sin2\Phi_{B_s}$ with High Mass Fourth Generation ${t'}$ 15m Large Lecture - Hall A

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
The Standard Model predicts the CP violation phase $\Phi^{\rm SM}_{B_s}= \arg M_{12} \simeq \arg(V^*_{ts}V_{tb})$ in $B_s$--$\bar B_s$ mixing is very small, of ${\cal}O(\lambda^2\eta) \simeq -0.02$, any finite value of $\Phi_{B_s}$ measured at the Tevatron would mean New Physics. Recent hints for finite $\sin2\Phi_{B_s}$ have appeared from CDF and D$\O$ experiments at the Tevatron Run II. We consider the possibility to account for it with the 4th generation $t'$ quark. Considering recent direct search bounds, we set the mass to be near the unitarity bound of 600 GeV. Combining the measurement values of $\Delta m_{B_s}$ with ${\cal B}(B_d\to X_s\ell^+\ell^-)$, together with typical $f_{B_s}$ values, we find a sizable $\sin2\Phi^{\rm SM4}_{B_s}\sim -0.3$. Using a typical value of $m_{b'}=580$ GeV, we get a narrow range of values, $0.089<|V_{t'b}|<0.100$, from the constraints $\Gamma(Z\to b\bar b)/\Gamma(Z\to{\rm hadrons})$, ${\cal B}(K^+\to\pi^+\nu\bar\nu)$ and $\Delta m_{D^0}$. Finally, we use the ZFITTER code to check the global fit deviation.
Speaker: Dr CHIEN-YI MA (NATIONAL TAIWAN UNIVERSITY)
• 4:05 PM
coffee break 25m main holl (Kraków, Poland)

### main holl

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
• 4:30 PM
A New Expected Upper Limit on the Rare Deacay Bs to mu+mu- with the D0 experiment 15m Large Lecture - Hall A

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
Speaker: isabelle ripp-baudot (IPHC Strasbourg, CNRS/IN2P3)
• 4:45 PM
ATLAS preparations for precise B-decay measurements sensitive to BSM phenomena 15m Large Lecture - Hall A

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
The LHC experiments will perform sensitive tests of physics phenomena beyond the Standard Model (BSM). Investigation of the decay of beauty hadrons represents an alternative approach to direct BSM searches. The ATLAS efforts concentrate on those B decays that can be selected by the first and second trigger levels. The most favorable trigger signatures will be for B hadrons decaying to μμ, either directly or via a J/psi meson. Using the J/psi trigger ATLAS will be able to collect unprecedentedly high statistics of Bs‐>J/ψφ decays, allowing measurements of CP violating effects, which are predicted by some BSM models to be significantly larger than the Standard Model. The di-muon trigger will also give ATLAS access to potentially large numbers of rare B->mumu decays, which may also be sensitive to BSM physics. The strategy is to carry on the di‐muon channel programme into the nominal LHC luminosity phase. The expected performance of the ATLAS trigger and event selection with respect to these two channels will be discussed.
Speaker: Dr James Catmore (Lancaster University, UK)
• 5:00 PM
B physics prospects of CMS with the first LHC data 15m Large Lecture - Hall A

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
B physics will be one of the key physics themes at the Large Hadron Collider (LHC). B hadrons are an ideal tool for advancing our current understanding of the flavour sector of the Standard Model (SM), and searching for effects originating from physics beyond the SM, thanks to the large production rate and the fact that B hadrons are relatively easy to trigger on and identify due to their long lifetime and high mass. The interplay between strong and electroweak effects in the production and decay of B hadrons makes them a unique test ground for both forces. The integrated luminosity collected by the CMS experiment during the first LHC running period 2009-2010 is expected to be about 300 pb^-1. In this talk, we present the estimated sensitivities of CMS with this first LHC data. The first B physics measurements with the CMS experiment include charmonium production (both prompt J/psi production and J/psi's from B decays), Upsilon production, exclusive final states B->J/psi K(*), b-quark production, and bbbar correlations.
Speaker: Prof. Paula Eerola (University of Helsinki)
• 5:15 PM
Rare B meson decays involving leptons at BABAR 15m Large Lecture - Hall A

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
presenters will be chousen
Speaker: Dr Giovanni Onorato (INFN Napoli - Università "Federico II" Napoli)
• 5:30 PM
Probing New Physics in exclusive b -> s l+ l- and b -> s nu anti-nu decays 15m Large Lecture - Hall A

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
The rare decay B -> K* l+ l- gives access to many angular observables that offer new important tests of the Standard Model and its extensions. We present a detailed study of these observables and point out a number of correlations which will allow a clear distinction between different New Physics scenarios. Furthermore, we discuss the decays B -> K* nu anti-nu, B -> K nu anti-nu and B -> X(s) nu anti-nu, which allow a transparent study of Z penguin physics. We study all observables accessible in these decays in the context of the Standard Model and various New Physics models.
Speaker: Mr David Straub (Technische Universität München)
• 5:45 PM
The MSSM with large tan(beta) beyond the decoupling limit 15m Large Lecture - Hall A

### Large Lecture - Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
If the parameter tan beta of the MSSM is large, enhanced loop corrections must be resummed to all orders in perturbation theory. We perform this resummation for flavour-diagonal and flavour-violating tan-beta-enhanced corrections without resorting to the decoupling limit, in which the MSSM is reduced to an effective 2HDM. Our results enable us to clarify the dependence of the resummed expressions on the renormalization scheme and to cover two new classes of processes with supersymmetric particles, which are both intractable with the conventional effective-2HDM method: The first class are collider processes with external supersymmetric particles; the second class are loop processes which vanish in the decoupling limit of supersymmetry. Applying the resummation formulae to FCNC processes in B physics, we find an interesting new effect in observables in which the chromomagnetic effective operator is important.
Speaker: Mr Lars Hofer (Karlsruhe Institut of Technology)
• 9:00 AM 6:15 PM
III. Higgs and New Physics Large Lecture - Hall B

### Large Lecture - Hall B

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
• 9:00 AM
Searches for squarks and gluinos at the Tevatron 15m
We present results on a search for squarks and gluinos performed on data from proton-antiproton collisions collected using the CDF and D0 detectors at the Fermilab Tevatron. Events with multiple jets of hadrons and large missing transverse energy in the final state are studied within the framework of minimal supergravity (mSUGRA) and assuming R-parity conservation. At D0, the search for squarks has also been performed in the topology of multijet events accompanied by large missing transverse energy and at least one tau lepton decaying hadronically. Preliminary results are presented.
Speaker: Dr Eric Kajfasz (Centre de Physique des Particules de Marseille)
• 9:15 AM
Searches for third generation squarks at the Tevatron 20m
In the Minimal Supersymmetric Standard Model (MSSM), the large mixing between the chiral states of the scalar partnerparticles of the standard model fermions might lead to small masses for sbottom and stop quarks. Dedicated searches are carried out in final states with large missing transverse energy and at least two jets, where at least one of the jets is required to be b-tagged (sbottom searches) or c-tagged (stop searches). Most recent results from several analysis performed by the CDF and D0 collaborations are presented.
Speaker: Mr Miguel Vidal (CIEMAT, Madrid)
• 9:35 AM
Squark and gluino production at the LHC 20m
The production of coloured supersymmetric particles is an important SUSY discovery channel at the LHC. Therefore it is essential to know the theoretical predictions for squark and gluino production cross sections with high accuracy. Higher order QCD corrections are dominated by the emission of soft gluons from initial and final state particles. The effects of soft gluon emission can be treated systematically to all orders by means of resummation techniques. In this talk I report on the calculation of the resummed cross sections for squark- and gluino-production processes in hadronic collisions and present the currently most precise predictions for these cross sections at the LHC.
Speaker: Dr Anna Kulesza (RWTH Aachen)
• 9:55 AM
Prospects for R-Parity Conserving SUSY searches at the LHC 20m
The talk will review the current strategies to search for generic SUSY models with R-parity conservation in the ATLAS and CMS detectors at the LHC. The discovery reach in early data will be presented for the different search channels based on missing transverse momentum from undetected neutralinos and multiple jets. The talk will also describe the search for models of gauge-mediated supersymmetry breaking for which the NLSP is a neutralino decaying to a photon and a gravitino. In this scenario, the search strategy exploits the distinct signature of a non-pointing photon. Finally, we will present recent work on techniques used to reconstruct the decays of SUSY particles at the LHC in early data, based on the selection of final-state exclusive decay chains.
Speaker: Dr Marie-Helene Genest (Ludwig-Maximilians-Universität München)
• 10:15 AM
Extracting backgrounds to SUSY searches from LHC data 15m
Any discovery of new physics relies on detailed understanding of the Standard Model background. At the LHC, we expect to extract the backgrounds from the data itself, with minimum reliance on Monte Carlo simulations. We describe new developments in ATLAS and CMS on such data-driven techniques, and prospects for their application on first data.
Speaker: Dr Vadym Zhuravlov (Max Planck Institut fuer Physik)
• 10:30 AM
coffee break 30m
• 11:00 AM
Statistical issues for Higgs and new physics searches 20m
How should we interpret discovery sensitivity plots and exclusion plots? What are the expected limits vs the actual ones? Was the look elsewhere effect taken into account? Why do Bayesian and frequentist approaches sometimes give very different answers? In a short review we will try to answer these and other questions that some of us wanted to ask but wouldn't dare.
Speakers: Dr Eilam Gross (Weizmann Institute), Prof. Eilam Gross (Weizmann Institute of Science)
• 11:20 AM
Search for Supersymmetry in final states with photons at the Tevatron 15m
Models of supersymmetry predict new heavy, neutral particles (neutralinos), that can decay into photon and the lightest supersymmetric particle, the gravitino. We present recent results on searches for these particles in proton-antiproton collisions at the Tevatron. No evidence of new physics is found and results are translated in limits on models of Gauge Mediated Supersymmetry Breaking. Final states that contains a photon and large missing transverse energy are used as well to search for a new light gauge boson in a hidden sector (dark photon) produced in decays of supersymmetric particles. Additional requirements for two spatially close leptons are applied in this case. No evidence for dark photons is found and limits are extracted on their production.
Speaker: Dr Andrey Loginov (University of Yale)
• 11:35 AM
The LHC Signatures of the Extended Gauge Structures in Supersymmetry 20m
The extensions of the minimal supersymmetric model (MSSM), driving mainly from the need to solve the \mu problem, involve novel matter species and gauge groups. These extended MSSM models can be searched for at the LHC via the effects of the gauge and Higgs bosons or their fermionic partners. Traditionally, the focus has been on the study of the extra forces induced by the new gauge and Higgs bosons present in such models. An alternative way of studying such effects is through the superpartners of matter species and the gauge forces. In this talk, we thus consider a U(1)' gauge extension of the MSSM, and perform a detailed study of the signatures of the model through the production and decays of the scalar quarks and gluino, which are expected to be produced copiously at the LHC. After a through study of the distinctive features of such models with regard to the signatures at the LHC, we carry out a detailed Monte Carlo analysis of the signals from the process pp-> n leptons + m jets + EMT, and compare the resulting distributions with those predicted by the MSSM. Our results show that the searches for the extra gauge interactions in the supersymmetric framework can proceed not only through the forces mediated by the gauge and Higgs bosons but also through the superpartner forces mediated by the gauge and Higgs fermions. Analysis of the events induced by the squark/gluino decays presented here is complementary to the direct Z' searches at the LHC.
Speaker: DURMUS DEMIR (IZTECH)
• 11:55 AM
Trilepton production at the CERN LHC: SUSY Signals and Standard Model Backgrounds 15m
Events with three or more isolated leptons in the final state are known to be signatures of new physics phenomena at high energy collider physics facilities. Standard model sources of isolated trilepton final states include gauge boson pair production such as $WZ$ and $W\gamma^*$, and $t\bar{t}$ production. We demonstrate that leptons from heavy flavor decays, such as $b \to lX$ and $c \to lX$, provide sources of trileptons that can be orders-of-magnitude larger after cuts than other standard model backgrounds to new physics processes. We explain the physical reason heavy flavor backgrounds survive isolation cuts. We propose new cuts to control the backgrounds in the specific case of chargino plus neutralino pair production in supersymmetric models. After these cuts are imposed, we show that it should be possible to find at least a 4 sigma excess for supersymmetry parameter space point LM9 with 30 fb$^{-1}$ of integrated luminosity. This presentation is based on Phys. Rev. {\bf D78}, 034030 (2008) [e-Print: arXiv:0805.3720 [hep-ph]] by E.L. Berger and Z. Sullivan and subsequent work.
Speaker: Dr Edmond Berger (Argonne National Laboratory)
• 12:10 PM
Study of SUSY particles properties at the future International Linear Collider with the International Large Detector 20m
Recently, Letters of Intent (LoI) for experiments at the International Linear Collider (ILC) have been submitted. Among the three proposals is the International Large Detector (ILD) concept which is at the focus of these studies. From various subjects addressed in the LoI, a wide spectrum of studies of SUSY particle properties is presented here. Most of them are benchmark reactions for the ILC and can be used both in physics studies and in work on detector design and optimization, respectively. All studies were performed with a full detector simulation using GEANT4, which is a great improvement compared to the previous results with much less detailed, so called "fast", simulation (SIMDET). The importance of this improved simulation is reflected in the results. The presented analyzes have been chosen to be the most challenging for the detector to study its performance and guide the detector development. Additionally an important problem of unavoidable beam induced backgrounds at linear colliders is addressed and ways of reducing its impact on physics studies are shown for an example SUSY analysis.
Speaker: Dr Katarzyna Wichmann (DESY)
• 12:30 PM
lunch break 2h
• 2:30 PM
Searches for low mass Higgs at the Tevatron (WH and ttH final states) 20m
We present a search for a low mass Standard Model Higgs boson produced in association with a W boson at the Fermilab Tevatron collider. The search is performed in events containing one lepton (electron, muon or tau), an imbalance in the transverse energy, and one or two b-tagged jets with about 5 fb-1 of data. This channel is one of the most powerful in the search for a low mass Higgs at the Tevatron, and results for several searches employing different techniques are presented. A search for the Standard Model Higgs boson produced in association with top anti-top quark pairs is also reported.
Speaker: Dr Mike Mulhearn (Columbia University)
• 2:50 PM
Search for low mass Higgs at the Tevatron (ZH and H to gamma gamma) 20m
We present a search for a low mass Standard Model Higgs boson produced in association with a Z boson decaying to charged leptons or invisibly into a pair of neutrinos at the Fermilab Tevatron collider. The final state is characterised by the presence of two b-tagged jets from the Higgs boson decay and two opposite-sign leptons (electron muon, tau) or a large imbalance in the transverse energy of the event due to the Z boson decay. This channel is in all of the decay modes very powerful. We present as well results of a search for SM Higgs bosons decaying to the di-photon final state. Both gluon fusion and associated production processes are exploited. Whilst the branching ratio to the di-photon final state is small in the Standard Model, this channel contributes appreciably to the overall Higgs sensitivity at the Tevatron.
Speaker: Dr Michele Giunta (University of Pisa)
• 3:10 PM
Searches for high mass Higgs at the Tevatron (WW(*) final states) 20m
We present searches for standard model Higgs production in p-pbar collisions at sqrt(s) = 1.96 TeV using the latest amount of data collected by the CDF and D0 detectors at the Fermilab Tevatron. We consider the diboson decay channel H->WW, the dominant decay mode for Higgs boson masses above 140 GeV/c^2. We also require that both W bosons decay leptonically. In order to maximize sensitivity, a combined matrix element method and neural network approach is used to distinguish signal from the large backgrounds. All Higgs production modes are considered, and cross-section limits relative to the combined standard model predictions are presented. In addition, searches for the Standard Model Higgs boson produced via the WH to WWW(*) process are presented.
Speaker: Mr Dean Hidas (University of Duke)
• 3:30 PM
Combined Upper limit for SM Higgs at the Tevatron 15m
We present the combination of the searches for the Standard Model Higgs boson at a center-of-mass energy of sqrt{s}=1.96 TeV, using up to 5 fb-1of data collected with the CDF and D0 detectors at the Tevatron collider. The major contributing processes include associated production (WH and ZH) and gluon fusion (gg to H to WW(*)). The significant improvements across the full mass range resulting from the larger data sets, improved analyses and inclusion of additional channels are also discussed.
Speaker: Dr Bjoern Penning (University of Freiburg)
• 3:45 PM
Search for a light CP-odd Higgs boson in BaBar 15m
We search for evidence of a light scalar (e.g. a Higgs boson) in the radiative decays of the narrow Upsilon(2S) and Upsilon(3S) resonances: Upsilon(2S,3S) --> gamma A^0, A^0 --> mu+ mu- and Upsilon(3S) --> gamma A^0, A^0 --> tau+ tau-. Such an object appears in extensions of the Standard Model, where a light CP-odd Higgs boson naturally couples strongly to b-quarks. We find no evidence for such processes, and set upper limits on the effective coupling of the b quark to A^0. We also set an upper limit on the di-muon and di-tau branching fractions of the eta_b meson.
Speaker: Dr MOKHTAR GABAREEN (SLAC National Accelerator Laboratory)
• 4:00 PM
coffee break 30m
• 4:30 PM
Electroweak Effects and Cross Section for Higgs production in gluon fusion process 15m
We present results for the mixed QCD-electroweak correction to the Higgs boson production cross section in gluon fusion process arising from light quarks, probing the factorization of QCD and electroweak corrections in this process. We show an updated theoretical prediction for the cross section based on this correction, the best current estimates for contributions from top and bottom quarks and the newest PDFs (MSTW2008).
Speaker: Dr Radja Boughezal (University of Zurich)
• 4:45 PM
Low mass Higgs and Higgs properties at the LHC 15m
We present recent MC results and search strategies for low mass Higgs and discuss about measurements of Higgs properties at the LHC. We focus on analysis of H->gamgam, VBF H->tautau, H->bbbar/WW produced with ttbar and vector boson.
Speaker: Dr Junichi Tanaka (ICEPP, University of Tokyo)
• 5:00 PM
High-mass Higgs search and combined discovery prospects at the LHC 20m
We present the discovery potential of the ATLAS and CMS detectors at the LHC for a neutral Higgs boson decaying to ZZ(*) -> 4 leptons (electrons or muons) or to WW(*) -> l nu l' nu' (l or l' = e or mu). The analysis relies on a full simulation of the detector response and emphasis is put on explicit strategies for the measurement of experimental and background systematics from data. We also present an evaluation of expected 95\% C.L. exclusion limits in early Higgs boson searches. We show that these two channels alone should allow for excluding the Standard Model Higgs boson in the mass range of 140-230 GeV by the time when CMS or ATLAS collect 1~fb$^{-1}$ of data at a center-of-mass energy of 14 TeV. We also give an estimate of how the change of the LHC center-of-mass collision energy from 14 to 10 TeV would impact the Higgs boson exclusion limits.
Speaker: Ms Cristina Botta (University of Turin and INFN)
• 5:20 PM
Three-loop Corrections to the Mass of the Light Higgs Boson in the MSSM 15m
The Minimal Supersymmetric extension of the Standard Model (MSSM) predicts the existence of a light neutral Higgs Boson. Once found at the LHC, its mass will immediately become a precision observable. The theoretical value of the Higgs mass is subject to large radiative corrections. Due to the large top Yukawa coupling, loops of top quarks and their superpartners provide the dominant contribution to the radiative corrections. We present a calculation of the SUSY-QCD corrections to these diagrams, up to the three-loop order. We find that our results are relevant compared with the expected experimental accuracy at the LHC and significantly reduce the theoretical uncertainty.
Speaker: Dr Philipp Kant (TTP Karlsruhe)
• 5:35 PM
Searches for non-SM higgs at the Tevatron 15m
We present searches for beyond standard Model Higgs production using the latest amount of data collected by the CDF and D0 detectors at the Fermilab Tevatron. Supersymmetric extensions of the standard model can yield enhanced Higgs production of a neutral MSSM Higgs boson, A, depending on the parameter tan(Beta). Separate searches are carried out for an A decaying to tau leptons or b-quarks, and set exclusion regions in tan(Beta) versus m_A space for each analysis. A search for the lightest neutral CP-even Higgs boson (h) in the next-to-minimal supersymmetric standard model is also carried out, where the h decays to a pair of lighter (<10 GeV) neutral pseudoscalar Higgs bosons (a) and the a bosons decay both to two muons or one to two muons and the other to two taus. This new search at the Tevatron is performed by looking for events with two pairs of collinear muons or a pair of collinear muons and missing transverse energy due to the tau decays. We present as well searches for MSSM charged Higgs bosons originating from top quark decay, and searches for higgs in technicolor models using events with a W boson, 2 jets and one or more b-tags.
Speaker: Dr Per Jonsson (Imperial College London)
• 5:50 PM
Search for non-standard-model Higgs at the LHC with ATLAS 15m
The discovery prospects of non Standard Model Higgs bosons with the ATLAS detector are presented. Due to the high branching ratio, results on decay channels that include tau leptons are presented both for the search of the neutral and the charged MSSM Higgs bosons. For the neutral Higgs bosons results on the muon pair final state are also reported. Furthermore, decay scenarios that include SUSY particle cascades are investigated. Finally, in the absence of light Higgs bosons, processes of vector boson scattering at high mass are discussed, in the context of studying the mechanism of electroweak symmetry breaking. All the studies presented are based on the analysis of Monte Carlo signal and background data simulated in detail through the experimental apparatus.
Speaker: Dr Dimitris Fassouliotis (University of Athens)
• 9:00 AM 2:30 PM
IV. Detectors (LHC and R&D) and Accelerators Small Hall

### Small Hall

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
• 9:00 AM
The Dark Energy Camera - a New Instrument for the Dark Energy Survey 15m
The discovery that the universe is accelerating, not slowing down from the mass it contains, is the surprise that sets the initial research program of 21st Century cosmology. The Dark Energy Survey (DES) is a next generation sky survey aimed directly at understanding this mystery. DES is designed to measure the dark energy equation of state parameter with four complementary techniques: galaxy cluster counts, weak lensing, angular power spectrum and type Ia supernovae. We present an overview of the DES instrument (DECam) which will be mounted at the prime focus of the Blanco 4m telescope at CTIO. DECam includes a 3 square degree focal plane covered by 62 2kx4k CCDs, a five element optical corrector, up to eight filters, a modern readout and control system, and the associated infrastructure for operation in a new prime focus cage. We will use the 250 micron thick fully-depleted CCDs developed at Lawrence Berkeley National Laboratory (LBNL). DECam also includes design features to enhance the image quality and the efficiency of operations. DECam will be devoted to the DES for 30% of the time over five years and will otherwise be available to the community as an NOAO facility instrument. We will review the status of the construction of the instrument highlighting the results of this summer's full scale integration tests.
Speaker: Dr Ignacio Sevilla (CIEMAT)
• 9:15 AM
NEXT: A Neutrinoless Double Beta Decay Experiment with a Gaseous Xenon TPC 15m
NEXT (Neutrino Experiment with a Xenon TPC) is a double beta experiment aiming to explore the degenerated hierarchy, with a sensitivity better than 100 meV. To do this the NEXT collaboration is planning to build a high pressure xenon TPC of about 100 kg, operated in the underground lab Canfranc. The advantage of a gaseous TPC is that it provides not only a good energy resolution but measuring in addition the event topology provides additional background suppression. The baseline design foresees to operate the detector with an electroluminescence readout which provides the best energy resolution achievable in pure xenon at high pressures. While the energy measurement is planned to be done with a few hundred PMTs, one of the challenges is to develop a UV light readout system for the tracking. In the presentation the detector concept and the R&D status will be presented.
Speaker: Dr Thorsten Lux (IFAE)
• 9:30 AM
The FP420 Project and GasToF: A Picosecond Timing Detector 15m
FP420 is an R&D project to assess the feasibility of installing proton detectors at 420m from the ATLAS and/or CMS interaction point(s) at the LHC, allowing the measurement, in high luminosity environment, of the spatial position and arrival time of protons scattered at very low angles with fractional momentum loss between 0.2% and 2%. This is expected to open a new program of electroweak, QCD and beyond-the-Standard-Model physics. The challenges of the project are presented, along with the solutions envisaged, notably for the detectors and the original moving mechanism to bring the detectors close to the beam, as recently reported in arXiv:0806.0302. The progress since then is discussed, in particular in the design and prototyping picosecond resolution time-of-flight detectors capable of accurate vertex reconstruction for background rejection at high-luminosities as well as in the in-situ calibration techniques. GasToF - a Cerenkov detector filled with dense gas and readout by fast MCP-PMTs is proposed for very precise ToF measurements of forward-scattered protons at the LHC. The test beam results, cosmic ray measurements and detailed simulations are presented showing that the GasToF detectors reach the time resolution of several ps and high efficiency very close to its mechanical edge. Operation of GasToF in high luminosity conditions depends on the performance of MCP-PMTs at large event rates. Several studies were performed using a dedicated fast laser setup for testing two kinds of MCP-PMTs - the Hamamatsu R3809U-50 and the Photek 210, and the obtained results are reported.
Speaker: Prof. Krzysztof Piotrzkowski (UCLouvain)
• 9:45 AM
Commissioning of the Silicon Strip Detector (SSD) of ALICE 15m
The Inner Tracking System (ITS) of the ALICE experiment, consists of six cylindrical layers of silicon detectors, the Silicon Pixel Detectors (SPD), the Silicon Drift Detectors (SDD) and the Silicon Strip Detectors (SSD). It covers the central pseudo-rapidity region ($|\eta| < 1.0$) for all vertices located within the length of the interaction diamond ($\pm 1 \sigma$). The outer layers of the ITS consist of double sided Silicon Strip Detectors mounted on carbon-fiber support structures. The SSD is crucial for the connection of tracks from the main tracking device of ALICE, the Time Projection Chamber (TPC), to the ITS and also provides dE/dx information to assist particle identification for low-momentum particles. The detector consists of 1698 modules each one having 1536 p and n-side strips, resulting in total to more than 2.6 million channels. The SSD has been actively participating in all the testing, commissioning and run activities as well as in all the data taking periods of the ALICE experiment, making it the largest working double sided detector in the world. It has registered large statistics of cosmic data in 2008 and is included in the initial detector configuration of ALICE for the first LHC collisions. In this talk, the latest results from the commissioning of the SSD with cosmics will be presented. The hardware status of the detector, the front-end electronics, cooling, data acquisition and issues related to the on-line monitoring will be shown. In addition, the procedures implemented and followed to address the alignment with the rest of the ITS sub-detectors along with both on-line and off-line calibration strategies will be described. Finally, results from simulations as well as from the reconstruction of cosmic data demonstrating the performance of the detector will be presented, proving that the SSD is ready for the forthcoming proton-proton data taking.
Speaker: Dr Panos Christakoglou (NIKHEF - Utrecht University)
• 10:00 AM
Commissioning and Performance of the LHCb Vertex Detector 15m
The LHCb Vertex Detector, VELO, is a crucial component of the experiment. We describe the preparations for taking data. New results from beam related LHC events are presented togethed with a summary of recent radiation studies on the VELO modules including high rate testsat CERN and testbeam studies at Fermilab. Developments of the online and offline infrastructure are described. Projections of the performance of the detector for physics data during 2009 and 2010 are given and its impact on physics performance discussed.
Speaker: Prof. Themis Bowcock (CERN)
• 10:15 AM
Commissioning the CMS pixel detector with Cosmic Rays 15m
The Compact Muon Solenoid (CMS) is one of two general purpose experiments at the Large Hadron Collider. The CMS experiment prides itself on an ambitious, all silicon based, tracking system. After almost 20 years of design and construction the CMS tracker detector has been installed and commissioned. The tracker detector consists of ten layers of silicon microstrip detectors while three layers of pixel detector modules are situated closest to the interaction point. The pixel detector consists of 66M pixels of 100um*150um size, and is designed to use the shape of the actual charge distribution of charged particles to gain hit resolutions down to 12 um. This presentation will focus on commissioning activities in the CMS pixel detector. Results from cosmic ray studies will be presented, in addition to results obtained from the integration of the pixel detector within the CMS detector and various calibration and alignment analyses.
• 10:30 AM
coffee break 30m
• 11:00 AM
ATLAS Inner Detector: Commissioning with Cosmics Data 15m
The ATLAS experiment at the CERN Large Hadron Collider (LHC) has started taking data last autumn with the inauguration of the LHC. Determination of vertex position and charged particle tracks is performed in the Inner Detector which consists of pixel and microstrip Silicon sensors and transition radiation tubes. In this talk construction and commissioning of these three detectors will be presented. The Pixel Detector is the innermost detector of the ATLAS experiment with approx. 80 million readout channels. After connection of cooling and services and verification of their operation the ATLAS Pixel Detector is now in the final stage of its commissioning phase. Prior to the first beams expected in Autumn 2009, a full characterization of the detector is performed. The SemiConductor Tracker (SCT) is made up from silicon micro-strip detectors processed in the planar p-in-n technology. Sensors are assembled into 4000 modules with 6 million readout channels. The completed SCT detector was operated for many months under realistic conditions. Calibration data has been taken and analysed to determine the noise performance of the system. In addition, extensive commissioning with cosmic ray events has been performed both with and without magnetic field. The cosmic muon data has been used to align the detector, to check the timing of the front-end electronics as well as to measure the hit efficiency of modules. The ATLAS Transition Radiation Tracker (TRT) is the outermost of the three sub-systems of the ATLAS Inner Detector. It consists of close to 300000 thin-wall drift tubes (straws) providing on average 35 two-dimensional space points with 0.17 mm resolution for charged particle tracks with pT > 0.5 GeV within |η| < 2. Transition radiation X-rays, generated by particles with γ > 1000 in the special material between the straws, are absorbed in the Xenon based gas mixture and give rise to large signal amplitudes. The front-end electronics implements two thresholds to discriminate the signals: a low threshold (< 300 eV) for registering the passage of minimum ionizing particles, and a high threshold (> 6 keV) to flag the absorption of transition radiation X-rays. The talk will report on the commissioning and first operational experience of the TRT detector and its sophisticated o#-detector systems for cooling, active gas, low- and high- voltage, data acquisition and control. Initial performance studies, based on the reconstruction and analysis of several million cosmic ray tracks, and from beam-halo or beam-splash events from single beams in LHC, will be described. All three sub-detectors were run in standalone and in a combined mode (also with other ATLAS subsystems). The current status of the Pixel, SCT and TRT detectors will be reviewed, including results from recent data-taking periods, and from the detector alignment. We will report on the commissioning of the detector, including overviews on services, connectivity and observed problems. The commissioning and running experience will then be used to extract valuable lessons for future silicon detector projects.
Speaker: Dr Lucia Masetti (Bonn University)
• 11:15 AM
ALICE TPC - design and performance 15m
ALICE is the dedicated heavy ion experiment at the LHC. The detector is optimised to register heavy ion collisions, up to Pb-Pb, as well as p-p ones. The main tracking device of the ALICE experiment is the Time Projection Chamber - TPC. We will present design of the detector and its performance. The current status of the detector and the capabilities to underlying physics, based on the cosmic rays tests, will be shown as well.
Speaker: Dr Adam Matyja (Institute of Nuclear Physics PAN ,ul. Radzikowskiego 152, 31-342 Kraków, Poland)
• 11:30 AM
The CMS Electromagnetic Calorimeter: Construction, Commissioning and Calibration 15m
The Compact Muon Solenoid (CMS) detector at the Large Hadron Colider (LHC) is ready for first collisions. The Electromagnetic Calorimeter (ECAL) of CMS, a high resolution detector comprised of nearly 76000 lead tungstate crystals, will play a crucial role in the coming physics searches undertaken by CMS. The design and performance of the CMS ECAL with test beams, cosmic rays, and first single beam data will be presented. In addition, the status of the calorimeter and plans for calibration with first collisions will be discussed.
Speaker: Dr Toyoko Orimoto (California Institute of Technology)
• 11:45 AM
Commissioning of the ATLAS Liquid Argon Calorimeter 15m
The Liquid Argon calorimeter (LAr) is one of the main sub-detectors in the ATLAS experiment at the LHC. It provides precision measurements of electrons, photons, jets and missing transverse energy produced in the LHC pp collisions. The LAr calorimeter has been installed in the ATLAS cavern and filled with liquid argon since 2006. The electronic calibration of the readout system, a critical system for precision measurements, has been continuously exercised in the commissioning phase, resulting in a fully commissioned calorimeter with its readout and a small number of problematic channels. A total of only 0.02% of the read out channels are dead beyond repair and 0.4% need special treatment for calibration. Throughout the last two years a large amount of calibration data has been collected. Cosmic muon data, first triggered via specially developed trigger boards on the LVL1 output of the Tile calorimeter and later with the standard ATLAS LVL1 calorimeter trigger, have been recorded at various stages of commissioning. In Sept 2008, with the first single beams circulating in the LHC ring and a near full readout of the calorimeter, events resulting from beam-gas interactions and beam-collimator splashes were recorded. We present here the LAr electronic calibration scheme, the measured stability of the pedestal, the pulse shape and the gain, and the expected calibration procedure for LHC running. We also present the calorimeter performance study based on the cosmic muon and LHC beam events. With the reconstructed muon minimum ionizing signal in the calorimeter, the uniformity of the barrel electromagnetic calorimeter can be checked. The timing alignment as measured from the data can be compared to the expectation. The high energy depositions in the calorimeter readout cells, either from catastrophic energy loss of the cosmic muons or from beam interactions, are used to validate the signal shape of calorimeter response derived from the calibration pulse.
Speakers: Dr Giuseppe Tartarelli (INFN - Sezione di Milano (Italy)), Mr Julien Labbé (LPSC, Université Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut Polytechnique de Grenoble)
• 12:00 PM
Muon Reconstruction and Identification in CMS 15m
Muonic final states will provide clean signatures for many physics processes at the LHC. One of the main goals of the Compact Muon Solenoid (CMS) design is thus to ensure efficient and accurate identification and reconstruction of muons. A sophisticated muon system is used for muon identification and stand-alone reconstruction and the inner silicon tracker exploits the high magnetic field to ensure a very precise transverse momentum resolution. The global reconstruction algorithms combine muons reconstructed in the dedicated spectrometer with tracks reconstructed in the inner detector. The CMS reconstruction software is well suited for both offline reconstruction and online event selection (HLT) and its performance has been studied in detail using Monte Carlo simulations. The muon reconstruction has also been employed successfully to reconstruct cosmic muons traversing the CMS detector. The design of the CMS muon identification and reconstruction is presented, as well as its performance on simulated and cosmic data.
Speaker: Dr Marcin Konecki (Institute of Experimental Physics, University of Warsaw, Warsaw, Poland)
• 12:15 PM
Performance of The ATLAS Muon Spectrometer During the Commissioning 15m
The ATLAS detector has been operated for several months. Its very large Muon Spectrometer includes four different technology chamber types. It should provide muon trigger up to pseudo-rapidity of 2.4 and track reconstruction with a nominal standalone momentum resolution around 10% for particles of 1 TeV. The Muon system, while still in completion, has undergone an intense program of commissioning, ranging from understanding the status of each single chamber to study the performance of the whole system. The data source, besides a few days with LHC single beam, mainly relied on cosmic rays. Several preliminary results relevant to the muon trigger and reconstruction performance will be analyzed.
Speaker: Dr Claudio Ferretti (University of Michigan)
• 12:30 PM
lunch break 2h
• 9:00 AM 6:00 PM
V. QCD at Colliders Exhibition room A

### Exhibition room A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
• 9:00 AM
Determinations of alpha_s from hadronic event shapes and tests of analytic hadronization models using e+e- annihilation data 15m
QCD predictions of hadronic event shapes, in complete 3rd order (NNLO) and in resummed 3rd order (NNLO & NLLA) perturbation theory, are applied to e+e- annihilation data in the c.m. energy range of 14 to 200 GeV, in order to precisely determine the running coupling alphas(Q). Moments of event shape distributions and respective predictions in NLO QCD are used to test different regions of phase space and various analytic models of hadronisation.
Speaker: Dr Christoph Pahl (MPI for Physics Munich)
• 9:15 AM
Automatic calculation of one-loop amplitudes 15m
In order to deal with the data from the experiments at LHC for the study of elementary particles, signals and potential backgrounds for new physics have to be under control at sufficient accuracy. In particular, hard processes with high multiplicities, involving many particles or partons, cannot be neglected. On top of that, such processes have to be dealt with at the next-to-leading order (NLO) level to, for example, reduce the scale dependence of observables and to have a better description of the shape of their distributions. Several fully automatized programs exist to perform leading order calculations for any hard scattering process. At NLO, several calculations exist for multiplicities up to 7 external particles, but no automatic tools to achieve this for arbitrary processes. The calculation of one-loop amplitudes, necessary in any NLO calculation, is a major bottleneck. An algorithm is presented, to automatically compute any one-loop amplitude, for all momentum, color and helicity configurations of the external particles.
Speaker: Dr Andreas van Hameren (IFJ-PAN, Krakow)
• 9:30 AM
Jets and alpha_s at HERA 20m
Jet cross sections in deep inelastic ep scattering (DIS) and photoproduction were measured with the H1 and ZEUS detectors at HERA using data collected in the years 1999-2007 and corresponding to an integrated luminosity of up to 500 pb-1. Measurements of differential cross sections for inclusive-jet production in DIS and photoproduction are presented together with the tri-jet to di-jet ratio in DIS. Inclusive jet, di-jet and tri-jet cross sections, normalised to the neutral current DIS cross sections, are also measured and presented as functions of Q^2, jet transverse momentum and proton momentum fraction. All the measurements are well described by perturbative QCD calculations at next-to-leading order corrected for hadronisation effects. QCD analyses of the measured observables were used to extract precise values of the strong coupling constant and test its energy-scale dependence.
Speaker: Joerg Behr (Hamburg University)
• 9:50 AM
Two and Three-jet measurements at D0 20m
We present measurements involving two jets in ppbar collisions at a center of mass energy of 1.96 TeV with the D0 detector at the Fermilab Tevatron Collider. We present dijet angular distributions and invariant mass distributions. The data are in good agreement with the prediction of perturbative QCD, and are used to constrain several new physics models including quark compositeness, large extra dimensions in case of angular distribution and resonances like excited quarks and W' and Z' bosons decaying into dijets in case of dijet mass distributions.
Speaker: Dr Nirmalya Parua (Indiana University, Bloomington)
• 10:10 AM
Study of jet production and subjet distributions in deep inelastic scattering at HERA 20m
Inclusive jet cross sections in charged current deep inelastic scattering (DIS) and three-jet production in DIS and photoproduction were studied with the ZEUS detector at HERA. For the study of inclusive jet-production in charged current DIS, differential cross sections are presented as functions of Q2, Bjorken x and the jet transverse energy and pseudorapidity. The dijet invariant mass cross section is also presented. Observation of three- and four-jet events in charged-current e±p processes is reported for the first time. The predictions of next-to-leading-order (NLO) QCD calculations are compared to the measurements. The data have the potential to constrain the u and d valence quark distributions in the proton if included as input to global fits. For the study of three-jet production measurements of differential cross sections are presented as functions of angular correlations between the three jets in the final state and the proton-beam direction. These correlations provide a stringent test of perturbative QCD and show sensitivity to the contributions from different colour configurations. Fixed-order perturbative QCD calculations assuming the values of the colour factors C_F, C_A and T_F as derived from a variety of gauge groups were compared to the measurements to study the underlying gauge group symmetry. The measured angular correlations in the deep inelastic ep scattering and photoproduction regimes are consistent with the admixture of colour configurations as predicted by SU(3) and disfavour other symmetry groups, such as SU(N) in the limit of large N. Subjet distributions were also measured in neutral current deep inelastic ep scattering with the ZEUS detector at HERA using an integrated luminosity up to 334 pb-1. Jets were identified using the kT cluster algorithm in the laboratory frame. Subjets were defined as jet-like substructures identified by a reapplication of the cluster algorithm at a smaller value of the resolution parameter ycut. Measurements of subjet distributions for jets with exactly two or three subjets are presented as functions of observables sensitive to the pattern of parton radiation and to the colour coherence between the initial and final states. In the case of three subjets measurements are also presented as functions of angular correlations between the three subjets which provide a stringent test of perturbative QCD and show sensitivity to the contributions from different colour configurations. Perturbative QCD predictions give an adequate description of the data.
Speaker: Claudia Glasman (Univer. Autonoma De Madrid)
• 10:30 AM
coffee break 30m
• 11:00 AM
The exclusive NLO DGLAP kernels for Non Singlet evolution 15m
We report here on the ongoing project, called KRKMC, in which NLO DGLAP evolution is performed for the exclusive multiparton distributions with the help of the exclusive kernels. These kernels are calculated within the two-parton phase space for bremsstrahlung subset of the Feynman diagrams of the non-singlet evolution, using Curci-Furmanski-Petronzio factorization scheme. The multiparton distribution with multiple use of the exclusive NLO kernels is implemented in the Monte Carlo program simulating multi-gluon emission from single quark emitter.
Speaker: Dr Maciej Skrzypek (IFJ-PAN)
• 11:15 AM
Dijet angular distributions at sqrt(s) = 14 TeV 15m
Jet production is the most dominant hard process in hadron collision experiments. While jets are background for many new physics searches, jets can also be used as a signal. Because of the rich abundance of jets, many jet studies can be performed with little integrated luminosity. The dijet angular distribution between the two hardest jets in the event has shown to be a very useful measurement; at low integrated luminosity it is a good tool to probe QCD, while with more statistics, a search for new physics, such as effects coming from large extra dimensions, becomes possible. We present a Monte Carlo study of dijet angular distributions at sqrt{s}=14 TeV. First we perform a next-to-leading order QCD study; we calculate the distributions in four different bins of dijet invariant mass (Mjj) using different Monte Carlo programs and different jet algorithms, and we also investigate the systematic uncertainties coming from the choice of the parton distribution functions and the renormalization and factorization scales. In the second part, we present the effects on the distributions coming from a model including gravitational scattering and black hole formation in a world with large extra dimensions. We report a discovery potential for the mass bin 1 < Mjj < 2 TeV at 10 pb−1 integrated luminosity.
Speaker: Ms Nele Boelaert (Lund University - Div. of Experimental High-Energy Physics)
• 11:30 AM
Minimum Bias and Hadronic Event Shapes at LHC 20m
The large uncertainties in the extrapolation at the LHC energies of the current phenomenological models for the track multiplicity and pt spectra in minimum bias events will require a direct measurement with the first data. The strategies developed by ATLAS and CMS are reviewed, with particular emphasis to the minimum bias trigger and low pt tracking efficiency. The ability of the experiment to disentangle between different models will be discussed. The study of the hadronic event shapes in QCD events will be also reviewed. The hadronic event shapes are robust against jet energy scale variations and resolution effects. This makes them appealing for the tuning of the Monte Carlo models with the first data.
Speaker: Dr Iacopo Vivarelli (University of Freiburg)
• 11:50 AM
QCD jets at LHC 20m
Jet production is the dominant process at the LHC. Studies of jet final states, over the full range of transverse momenta, are of great importance as they can serve to confront perturbative QCD calculations, test the extent to which partons are elementary, and investigate many interesting physics processes within and beyond the standard model. In this talk, we present the plans and prospects for QCD measurements at the ATLAS and CMS experiments. The kinematic reach and the expected statistical and systematic uncertainties for the early data will also be discussed.
Speaker: Dr Leonard Apanasevich (University of Illinios at Chicago)
• 12:10 PM
Preliminary Results on Multiple Parton Interactions from HERA and TEVATRON 20m
Photoproduction data of HERA are analyzed by requiring dijets with transverse momenta of at least 5 GeV. The two jets define in azimuth a towards region (leading jet) and an away region (2nd jet) and transverse regions between them. The charged particle multiplicity is measured in these regions as a function of the variables x_{gamma} and pT_{leading jet}. Models which include contributions of multiparton interactions are able to describe the measurement, whereas predictions without them lie below the measurements, especially at low x_{gamma}, the region of enhanced contributions from the resolved photon. Double parton (DP) interactions in “gamma + 3 jet” events in p-pbar collisions at sqrt{s}=1.96TeV are studied basing on the sample of “gamma + 3jet” events collected in the D0 experiment with an integrated luminosity of 1fb^{-1}. The fraction f{DP} of the events with double parton scattering is determined. The events are selected with photon candidate transverse momentum 60 < pT^{gamma} < 80 GeV. The leading jet pT ^{jet} > 25 GeV and two additional jets with pT > 15 GeV. The values of f{DP} are measured in three intervals of the transverse momentum pT^{jet2} of the second jet which spans the range of 15 - 30 GeV. It is found that the f{DP}fractions drop with increasing of pT^{jet2}. The effective cross section sigma_{eff} (a process-independent parameter which contains an information about the parton density inside the proton and about the parton correlations) is calculated in the same three pT^{jet2} intervals. The average value over these three pT^{jet2} intervals is sigma_{eff}^{aver} = 15.1 +/- 1.9 mb.
Speaker: Prof. D0 H1 (DESY, FNAL)
• 12:30 PM
lunch break 2h
• 2:30 PM
Higher-order QCD corrections to vector boson production at hadron colliders. 15m
We consider QCD radiative corrections and their to the production of vector bosons in hadron collisions. We present a fully exclusive calculation up to next-to-next-to-leading order (NNLO) in QCD perturbation theory. Our calculation is implemented in a parton level Monte Carlo program which allows the user to apply arbitrary kinematical cuts on the final-states and to compute the corresponding distributions in the form of bin histograms. We show selected numerical results at the Tevatron and the LHC. We discuss the resummation of logarithmic-enhanced QCD corrections at small values of qT and the matching procedure to consistently combine resummation with the fixed order perturbative result at intermediate and large qT. We present a study of the scale dependence and of the perturbative uncertainty of our results. We compare numerical results for e+e- pairs from the decay of Z bosons with the available Tevatron data.
Speaker: Dr Giancarlo Ferrera (Florence University)
• 2:45 PM
Measurement of Z/gamma+jet+X and photon+b/c +X Cross Sections with the D0 Detector 20m
We present measurements of differential cross sections for the inclusive Z/gamma plus jet production and for the inclusive photon plus heavy flavor production in a data sample of 1fb-1 collected with the D0 detector in proton antiproton collisions at sqrt(s)=1.96TeV. In the first measurement, we compare kinematic distributions of the Z/gamma and the jet as well as of the various angles of the Z+jet system, with different Monte Carlo event generators and next-to-leading order perturbative QCD (NLO pQCD) predictions with non-perturbative corrections applied. In the second measurement, we compare the results with next-to-leading order perturbative predictions, covering photon transverse momenta 30-150 GeV, photon rapidities |y_gamma| < 1.0, jet rapidities |y_jet| < 0.8, and jet transverse momenta pT_jet > 15 GeV.
Speaker: Dr Murilo Rangel (Laboratoire de l'Accélérateur Linéaire)
• 3:05 PM
Prompt Photon Production in Deep Inelastic Scattering and Photoproduction at HERA 20m
Prompt-photon cross sections in deep inelastic ep scattering were measured with the ZEUS detector at HERA using an integrated luminosity of 320 pb-1. A clear signal for isolated photons in the photon transverse-energy and rapidity ranges 4 < E_T^gamma < 15 GeV and -0.7 < eta^gamma < 0.9 was observed for virtualities of the exchanged photon of Q^2 > 10 GeV^2. Measurements of differential cross sections are presented for inclusive prompt-photon production as a function of Q^2, x_Bj, E_T^gamma and eta^gamma. Perturbative QCD predictions are compared to the measurements. The production of isolated photons in deep-inelastic scattering $ep\to e \gamma X$ is measured with the H1 detector at HERA. The measurement is performed in the kinematic range of negative four-momentum transfer squared 4<Q^2<150 GeV^2 and a mass of the hadronic system W_X>50 GeV. The analysis is based on a total integrated luminosity of 227 pb^-1. The production cross section of isolated photons with a transverse energy in the range 3 < E_T^\gamma < 10 GeV and pseudorapidity range -1.2 < \eta^\gamma < 1.8 is measured as a function of E_T^\gamma, \eta^\gamma and Q^2. Isolated photon cross sections are also measured for events with no jets or at least one hadronic jet. The measurements are compared with predictions from Monte Carlo generators modelling the photon radiation from the quark and the electron lines, as well as with calculations at leading and next to leading order in the strong coupling. The predictions significantly underestimate the measured cross sections. A measurement of the production of prompt photons in photoproduction by the H1 experiment at HERA is presented. The analysis is based on the data taken in the years 2004-2007, with a total integrated luminosity of 340 pb^-1. Prompt photon cross sections are measured for photons with a transverse energy in the range 6 < E_T^gamma < 15 GeV and in the pseudorapidity range -1 < eta^gamma < 2.4. Cross sections for prompt photon events with an additional hadronic jet are measured as a function of the transverse energy and pseudorapidity of the jet and of the momentum fractions x_gamma and x_proton of the incident photon and proton, respectively, carried by the constituents participating in the hard scattering process. Additionally, the transverse correlation between the photon and the jet is studied. The results are compared with predictions of a next-to-leading order calculation and a calculation based on the k_T factorisation approach.
Speaker: Krzysztof Nowak (Zuerich University)
• 3:25 PM
QCD Studies with W and Z Measurements at LHC 20m
Events containing W or Z bosons, with subsequent leptonic decays, are important channels to test the Standard Model. They will be copiously produced at the Large Hadron Collider (LHC). Identification of these events will probe QCD predictions for the associated production of W or Z bosons with one or more jets and will constrain the parton distribution functions of the proton through measurements such as the W charge asymmetry and the Z/gamma* rapidity distribution. Studies of the prospects for these measurements using the ATLAS and CMS detectors will be presented, with emphasis on the potential for the first years of LHC operation.
Speaker: Ms Imai Jen-La Plante (Enrico Fermi Institute, University of Chicago)
• 3:45 PM
Studies of W and Z production with the LHCb experiment 15m
We report on studies of W and Z boson production in the LHCb experiment. Strategies for triggering, boson selection and background reduction are described. Prospects for differential cross-section measurement are given, with estimates of statistical and systematic errors. The sensitivity of the differential cross sections to parton density functions is discussed.
Speaker: Dr Tara Shears (University of Liverpool)
• 4:00 PM
coffee break 30m
• 4:30 PM
Dynamical Parton Distributions at NNLO 15m
Utilizing recent DIS measurements and Drell-Yan data we determine at NNLO (3-loop) of QCD the dynamical parton distribution functions of the nucleon generated radiatively from valencelike positive input distributions at an optimally chosen low resolution scale. These are compared with standard'' NNLO distributions generated from positive input distributions at some fixed and higher resolution scale. Although the NNLO corrections imply in both approaches an improved value of chi-square, present DIS data are still not sufficiently accurate to distinguish between NLO results and the minute NNLO effects of a few percent, despite of the fact that the dynamical NNLO uncertainties are somewhat smaller than the NLO ones and both are, as expected, smaller than those of their standard'' counterparts. The dynamical predictions for the longitudinal structure function of the proton become perturbatively stable already at Q^2 = 2-3 GeV^2 where precision measurements could even delineate NNLO effects in the very small-x region. This is in contrast to the common standard'' approach but NNLO/NLO differences are here less distinguishable due to the much larger uncertainty bands.
Speaker: Dr Pedro Jimenez-Delgado (Technische Universität Dortmund)
• 4:45 PM
Measurement of the Inclusive ep Scattering Cross Section at Low and Medium Q^2 at HERA 20m
Measurements of the inclusive ep scattering cross section are presented in the region of low to medium momentum transfers, 0.2 GeV^2 < Q^2 < 150 GeV^2, and Bjorken x, 5x10^-6 < x < 0.1. The results are based on data sets collected by the H1 Collaboration at HERA at positron beam energies of 27.6 GeV and proton beam energies of 820 or 920 GeV. A combination with data previously published by H1 leads to a cross section measurement of a few percent accuracy at low Q^2 and 1.3-2% at medium Q^2. A kinematic reconstruction method exploiting radiative ep events extends the measurement to lower Q^2 and larger x. The low Q^2 data are compared with theoretical models which apply to the transition region from photoproduction to deep inelastic scattering. A next-to-leading order QCD analysis is performed on the data with sufficiently high Q^2 to determine the parton distributions in the proton.
Speaker: Jan Kretzschmar (University of Liverpool)
• 5:05 PM
Measurements of the longitudinal proton structure function at HERA 20m
The reduced cross sections for ep deep inelastic scattering have been measured with the ZEUS and H1 detectors at HERA at three different centre-of-mass energies, 318, 251 and 225 GeV. From the cross sections, measured double differentially in Bjorken x and the virtuality, Q2, the proton structure functions F_L and F_2 have been extracted in a wide kinematic region. The measurements are compared with NLO QCD predictions.
Speaker: Burkard Reisert (Max-Planck-Institut für Physik, München)
• 5:25 PM
Determination of the proton parton density functions at HERA 20m
Jet cross sections in deep inelastic ep scattering and photoproduction were measured with the ZEUS detector at HERA using an integrated luminosity of up to 500 pb-1. Measurements of differential cross sections are presented for dijet production and compared with perturbative QCD predictions. Regions of phase space where the cross sections are sensitive to the gluon content of the proton with small uncertainties were identified. These measurements have the potential to constrain the gluon density in the proton when included as input to global QCD fits. A NLO QCD analysis on ZEUS jet-production data and inclusive cross-section data, including data with polarised lepton beams, is presented. The analysis includes the most recent results on neutral current and charged current inclusive cross sections in e+p and e-p collisions extracted from the HERAII data, together with the NC cross sections measured at lower proton beam energy. The analysis is used to assess the impact of the most recent data on the parton distribution functions and their uncertainties. A measurement of the inclusive deep-inelastic neutral current e+p scattering cross section is reported in the region of four-momentum transfer squared, 12 < Q^2 < 50 GeV^2, and Bjorken x, 2x10^-4 < x< =0.1. The results are based on data collected by the H1 Collaboration at the ep collider HERA at positron and proton beam energies of E_e=27.6 GeV and E_p=920 GeV, respectively. The data are combined with previously published data, taken at E_p=820 GeV. The accuracy of the combined measurement is typically in the range of 1.3-2%. A QCD analysis at next-to-leading order is performed to determine the parton distributions in the proton based on H1 data.
Speaker: Juan Terron (Univer. Autonoma De Madrid)
• 5:45 PM
Combination of H1 and ZEUS Deep Inelastic ep Scattering Cross Section Measurements and NLO-QCD analysis 15m
Deep inelastic scattering cross section measurements previously published by the H1 and ZEUS collaborations are combined. The procedure takes into account the systematic error correlations in a coherent approach, leading to a significantly reduced overall cross section uncertainty by cross calibrating the various data sets. The analysis is based on data with momentum transfers Q^2 > 0.045 GeV^2 collected by the H1 and ZEUS collaborations between the years 1995 and 2000. This combined HERA-I data set, of neutral and charged current inclusive cross sections for e+p and e-p scattering, is used as the sole input for a next-to-leading order (NLO) QCD parton distribution function (PDF) fit. The consistent treatment of systematic uncertainties in the joint data set ensures that experimental uncertainties on the PDFs can be calculated without need for an increased chi^2 tolerance. This results in PDFs with greatly reduced experimental uncertainties compared to the separate analyses of the ZEUS and H1 experiments. Model uncertainties, including those arising from parametrization dependence, are also carefully considered. The resulting HERA PDFs have impressive precision compared to the global fits.
• 9:00 AM 6:15 PM
VI. QCD in Hadronic Physics Exhibition room B

### Exhibition room B

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
• 9:00 AM
KLOE results on light meson properties 20m
The KLOE experiment has collected 2.5 fb-1 at the peak of the phi resonance at the e+e- collider DAPHNE in Frascati. The whole data set includes 100 million eta's produced through the radiative decay phi --> eta gamma and tagged by means of the monochromatic recoil photon. With this sample, we are studying eta rare decays. We have a final result for the BR measurement of the eta --> pi+pi-e+e- decay, with a sample of 1600 signal events, 100 times larger than previous best measurement. These events are also used to measure the asymmetry between the pi+pi- and the e+e- decay planes in the eta rest frame, whose observation could test unexpected mechanism of CP violation, thus providing an hint of new physics beyond the Standard Model. The same four track final state is also under study to observe for the first time the eta --> e+ e- e+ e- decay channel. Using a sample of 600 pb-1 collected at center of mass energy between 1000 and 1030 MeV, we have measured the cross section parameters for the two processes e+ e- --> pi+ pi- pi0 pi0 and e+ e- --> pi0 pi0 gamma, which proceed through the omega pi0 intemediate state. The ratio Gamma(omega-->pi0gamma)/Gamma(omega-->pi+pi-pi0) is extracted with an accuracy of 1.8%. This measurement substantially improves the accuracy of the two corresponding branching fractions, giving a value for BR(omega-->pi0gamma) which is three standard deviation lower than the PDG fit. Moreover, the observed interference pattern at the phi peak is used to extract the most precise measurement to date of the BR for the OZI and G-parity violating phi --> omega pio decay. We have also new results in the scalar meson sector. We have the final measurement for the search of the phi --> K0 K0bar gamma decay, which proceeds through f0(980)/a0(980) gamma. No previous measurement of this decay mode exists. Theoretical predictions for the branching fraction are spread in the 10^(-7)--10^(-9) range. KLOE looks for Ks Ks gamma final state events, with both Ks decaying in pi+pi-. Results for the upper limit on the branching ratio are presented with the full KLOE statistics, which allows to test most of the available theory models. Moreover we have the final measurement of the high statistics results on the phi --> a0(980) gamma decay, with a0 in eta pi0 for two different eta final states, which provide the BR measurement and also the determination of the a0(980) coupling to eta pi and KK. The unfolded M(etapi) spectrum has been also extracted. Finally, we have updated our measurement of the gluonium content of the eta' that indicated a 3 sigma's evidence. Other SU(3) relations were added in the fit of the vector to pseudoscalar gamma, pseudoscalar to vector gamma and pseudoscalar to gamma gamma transitions, thus allowing the extraction of other parameters, such as the vector mixing angle and the SU(3) breaking parameter 2*ms/(mu+md). The effect of including the pseudoscalar to two gammas decay amplitudes on the fit result is also discussed.
Speaker: Dr Biagio DI MICCO (Istituto Nazionale di Fisica Nucleare)
• 9:20 AM
Physics with the KLOE2 experiment at the phi factory 20m
We report on the most debated issues which experimentation at the phi factory can really shed light on with a short-term program of measurements. Recent, very promising improvements in the lattice-QCD calculations call for new precision measurements in the Kaon sector to obtain more stringent results on CKM Unitarity and Lepton Flavour Universality. Neutral Kaon Interferometry can probe Discrete Symmetries, but also Quantum Mechanics at the Planck scale. Current limits obtained by KLOE can be overcome by both, the increase in statistics, and the upgrade of the tracking system with an inner GEM chamber for improving vertex resolution near the beam interaction region. One possible solution to the Dark Mass problem, allowing also to interpret the positron excess measured by the satellite Payload experiment PAMELA, suggests a dark'' sector that can really be constrained by the experiments at the Kaon and B-Factories. Low energy QCD phenomenology can receive an important contribution from the new measurements of radiative and non-leptonic decays of K, eta and eta' mesons. Finally, important results on the physics in the continuum can be achieved by new measurements of the hadronic cross section and the study of gamma-gamma processes. Improvements on hadronic cross section at low energy are needed to understand the 3-sigma effect on (g-2)_{mu} and for precision determination of alpha_{em} at the TeV scale while the analysis of the gamma-gamma sample impacts scalar spectroscopy and the underlying physics but also the light-by-light hadronic contribution to (g-2)_{mu}.
Speaker: Dr Paolo Gauzzi (University of Rome "La Sapienza")
• 9:40 AM
QCD tests at NA48 25m
The NA48/2 experiment was originally constructed to measure CP violation in charged kaon sector, using simultaneous positive and negative kaon beams. Several charged kaon decay modes have been collected during two years of data taking. The kaon system is a unique laboratory in which study the dynamics of the QCD in low energy regime, with high statistics and precision. The pi-pi scattering close the threshold has been studied with unprecedented statistics, using more than one million K+- --> Pi+ Pi- e+- nu (Ke4) and the cusp structure in more than 60 million K+- --> pi+- pi0 pi0. The S-wave scattering lengths a0 and a2 have been measured independently in these two modes allowing accurate tests of Chiral Perturbation Theory. We also report on the measurement of the branching fraction of the decay K+- -> pi+- gamma gamma using more than 1000 reconstructed decays from the 2003 NA48/2 data set. The data statistics are about a factor of 30 larger than for any previous measurement. The spectrum of invariant gamma gamma mass shows the expected behaviour, being compatible with a decay parameter c^ of the order of 2. In addition we report on the first measurement of the related decay K+- -> pi+- e+ e- gamma (with internal gamma conversion) branching fraction and the decay distribution, using 120 reconstructed K+- -> pi+- e+ e- gamma events from the complete NA48/2 data set. Both measurements are in good agreement with the theoretical expectations from Chiral Perturbation Theory.
Speaker: Dr Gianluca Lamanna (SNS &amp; INFN Pisa)
• 10:05 AM
New Hadroproduction results from the HARP/PS214 experiment at CERN PS 25m
(HARP Collaboration ) Measurements of the double differential charged pion cross sections from incident pions, protons in the momentum range 3-12 GeV/c on thin nuclear targets (Be, N2, O2, Al, Cu, Sn, Ta, Pb) are presented. Results are compared with the GEANT4 and MARS MonteCarlo generators.
Speaker: Dr Maurizio Bonesini (Sezione INFN Milano Bicocca)
• 10:30 AM
coffee break 30m
• 11:00 AM
Renormalization of B-meson distribution amplitudes 20m
We study some properties of light-cone distribution amplitudes of B-mesons, which are a key ingredient for factorisation approaches for B-meson decays. We determine how two-parton distribution amplitudes mix with three-parton ones at one loop: \phi_+ is shown to mix only into itself, whereas \phi_- mixes with the difference of three-parton distribution amplitudes \Psi_A-\Psi_V. We determine the corresponding anomalous dimension and confirm some constraints on \phi_+ and \phi_- derived from the light-quark equation of motion. Finally, we comment on some implications of our result for phenomenological models of these distribution amplitudes.
Speaker: Dr Sébastien Descotes-Genon (LPT Orsay (CNRS/Univ. Paris Sud 11))
• 11:20 AM
Recent results on two-photon physics at BABAR 20m
Two-photon processes produced at e+e- colliders via the reaction e+ e- --> e+ e- gamma gamma(*) --> e+ e- X, provide important experimental data for the study of hadronic spectra and testing QCD predictions. We report here on recent results in a number of these channels that are obtained at the PEP-II collider with the BABAR detector. The gamma gamma --> pi0pi0, pi0eta, and etaeta cross sections are measured in the two photon invariant mass range from 2 GeV to 5 GeV using both single tag and no tag techniques. We also present measurements of the photon-meson transition form factors using the single tag technique. The gamma gamma* -> pi0 transition form factor for the momentum transfer range Q2=4-40 GeV2 and the gamma gamma* -> eta_c transition form factor for the range Q2=2-50 GeV2 will be presented.
Speaker: Dr Vladimir DRUZHININ (Budker Institute of Nuclear Physics, Novosibirsk, Russia)
• 11:40 AM
Charmonium-like results from BABAR 25m
Several charmonium-like states above $D\bar{D}$ threshold have been discovered at the Belle and BABAR B-factories. Some are produced via Initial State Radiation ({\it e.g.} $Y(4260)$ and $Y(4350)$) and some are observed in $B$ meson decays ({\it{e.g.}} $X(3872)$, $Y(3940)$. The Belle observations of the $Z(4430)^-$, $Z(4050)^-$, and $Z(4248)^-$ states have generated much interest, since these states must have minimum quark content ($c\bar{c}d\bar{u}$), and hence would represent the unequivocal manifestation of a four-quark meson state. I shall report BABAR results on the $Y(4260)$, $Y(4350)$, $X(3872)$, $Y(3940)$, and describe the \babar\ search for the Z(4430)^-.
Speaker: Dr Arafat Gabareen Mokhtar (SLAC National Accelerator Laboratory)
• 12:05 PM
Charmonium-like particles at Belle 25m
From a Dalitz plot analysis of $B \to K \pi^+ \psi'$ decays, we find a signal for $Z(4430)^+ \to \pi^+ \psi'$ with a mass $M = (4442^{+15}_{-12}{}^{+19}_{-13})$MeV/$c^2$, width $\Gamma = (107^{+86}_{-43}{}^{+74}_{-56})$ MeV, product branching fraction $\mathcal{B}(\bar{B}^0 \to K^- Z(4430)^+) \times \mathcal{B}(Z(4430)^+ \to \pi^+ \psi') = (3.2^{+1.8}_{-0.9}{}^{+5.3}_{-1.6}) \times 10^{-5}$, and significance of 6.4$\sigma$ that agrees with previous Belle measurements based on the same data sample. In addition, we determine the branching fraction $\mathcal{B}(B^0 \to K^*(892)^0 \psi') = (5.52^{+0.35}_{-0.32}{}^{+0.53}_{-0.58}) \times 10^{-4}$ and the fraction of $K^*(892)^0$ mesons that are longitudinally polarized $f_{L} = (44.8^{+4.0}_{-2.7}{}^{+4.0}_{-5.3})\%$. These results are obtained from a large data sample collected near the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric energy $e^+ e^-$ collider. The CDF collaboration recently reported a narrow structure $Y(4341)$ near the $J/\psi \phi$ threshold with a statistical significance of 3.8 $\sigma$. A similar study is performed in the $B \to J/\psi \phi K^+$ mode to verify whether or not this new structure is present in Belle data. We also have searched for a charmonium-like state in the process $\gamma \gamma \to \omega J/\psi$ in the mass region, 3.9-4.2 GeV/$c^2$. This may be related to one or more of the three charmonium-like states reported in the similar mass region.
Speaker: Sookyung Choi (Gyeongsang)
• 12:30 PM
break 2h
• 2:30 PM
Cross-sections of hadron production by 3-15 GeV/c beams of protons and charged pions. 20m
Precise measurements of hadron production on nuclear targets are vital for the design of a future neutrino factory and important for the tuning of hadron generators such as Geant4. The hadron yield must be known as a function of the energy and the production angle of the secondary particles. We report on HARP-CDP measurements of double-differential inclusive cross-sections of pion, proton and deuteron production on Beryllium, Copper and Tantalum targets, by beams of protons and charged pions in the momentum range between 3 and 15 GeV/c. Our studies show that cross-sections published by the "HARP Collaboration" are wrong by factors up to two.
Speaker: Ms Anastasia Bolshakova (Joint Institute for Nuclear Research)
• 2:50 PM
Cross-section measurements at Belle 25m
The differential cross section for the process $\gamma \gamma \to \eta \pi^0$ has been measured in the kinematic range 0.84 GeV $< W <$ 4.0 GeV, $|\cos \theta^*| < 0.8$, where W and $\theta^*$ are the energy and $\pi^0$ (or $\eta$) scattering angle, respectively, in the $\gamma-\gamma$ center-of-mass system. The results are based on a 223 fb$^{-1}$ data sample collected with the Belle detector at the KEKB $e^+ e^-$ collider. Clear peaks due to the $a_0(980)$ and $a_2(1320)$ are visible. The differential cross sections are fitted in the energy region 0.9 GeV $< W <$ 1.46 GeV to obtain the parameters of the $a_0(980)$. The energy and angular dependences above 3.1 GeV are compared with those measured in the $\pi^0$ $\pi^0$ channel. The measured cross section ratio is consistent with QCD predictions. The $W^{-n}$ dependence of the integrated cross section has also been measured. We also report a measurement of the exclusive cross section for $e^+ e^- \to D^0 D^{*-}\pi^+$ as a function of center-of-mass energy from the $D^0 D^{*-}\pi^+$ threshold to 5.2 GeV with initial-state radiation. The analysis is based on a data sample collected with the Belle detector at the $\Upsilon(4S)$ resonance and nearby continuum with an integrated luminosity of 695 fb$^{-1}$ at the KEKB asymmetric-energy $e^+ e^-$ collider. The cross section s of the reactions $e^+ e^- \to \phi \eta$, $\phi \eta'$, $\rho \eta$, $\rho \eta'$ have been measured using a data sample of 516 fb$^{-1}$ collected with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. The energy dependence of the cross sections is presented using Belle measurements together with those of CLEO and BaBar.
Speaker: Burkard Reisert (MPI)
• 3:15 PM
Study of $\Upsilon$(5S) decays to $B^0$ and $B^+$ mesons 20m
The $\Upsilon$(5S) decays to channels with $B^+$ and $B^0$ mesons are studied using a 23.6 fb~$^{-1}$ data sample collected on the $\Upsilon$ (5S) resonance with the Belle detector at the KEKB asymmetric energy $e^+ e^-$ collider. Using fully reconstructed $B$ mesons, we measure the total $B^+$ and $B^0$ production rates per $b\bar{b}$ event and the two-body, three-body and four-body channel $\Upsilon$(5S) decay fractions for events with $B$ mesons.
Speaker: Dr Alexey DRUTSKOY (University of Cincinnati)
• 3:35 PM
Bottomonium Studies at BaBar 25m
I will summarize selected studies in bottomonium physics carried out by the BaBar experiment, including bottomonium decays to open charm, the study of chi_bJ(1P) radiative decays, and the search for the eta_b in hadronic transitions.
Speaker: Dr Veronique Ziegler (SLAC National Accelerator Laboratory)
• 4:00 PM
coffee break 30m
• 4:30 PM
Light particle searches at Belle 20m
We report on a search for the $X(1812)$ state in the decay $B^\pm \to K^\pm \omega \phi$ with a data sample of $657\times 10^6$ $B\bar{B}$ pairs collected with the Belle detector at the KEKB $e^+e^-$ collider. No significant signal is observed. An upper limit ${\cal B}(B^\pm \to K^\pm X(1812)$, $X(1812) \to \omega \phi) < 3.2\times 10^{-7}$ (90\% C.L.) is determined. We also constrain the three-body decay branching fraction to be ${\cal B}(B^\pm \to K^\pm \omega \phi) < 1.9 \times 10^{-6}$ (90\% C.L.). We also report on a search for a low mass particle with a mass of 214.3 MeV/$c^{2}$ reported by the HyperCP experiment at Fermilab. For this search we use the following decay modes: $B^{0}\to K^{-}\pi^{+}X^{0}$, $X^{0}\to \mu^{+}\mu^{-}$; $B^{0}\to \pi^{-}\pi^{+}X^{0}$, $X^{0}\to \mu^{+}\mu^{-}$; $B^{0}\to K^{*0} X^{0}$, $K^{*0}\to K^{+}\pi^{-}$, $X^{0}\to \mu^{+}\mu^{-}$; and $B^{0}\to \rho^{0} X^{0}$, $\rho^{0}\to \pi^{+}\pi^{-}$, $X^{0}\to \mu^{+}\mu^{-}$, where $X^{0}$ is a pseudo-scalar particle with mass of 214.3 MeV/$c^{2}$. We finally report a search for the $X(1835)$ state via $e^+ e^- \to J/\psi X(1835)$ process with a data sample of 673 fb$^{-1}$ collected on and off $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. As no significant signal is found for $e^+ e^- \to J/\psi X(1835)$ production, we measure an upper limit on its cross-section $\sigma_{Born}[e^+ e^- \to J/\psi X(1835)] \times [Br(X(1835) \to >2charged)]$.
Speaker: Chao Liu (USTC)
• 4:50 PM
Heavy hadron spectroscopy in a Salpeter model with AdS/QCD inspired potential 20m
The quark-antiquark potential obtained in a gauge/gravity (AdS/QCD) approach is inserted in a Salpeter equation to determine heavy hadron masses. The parameters of the model are fixed fitting the known spectrum of the $S$-wave mesons in the sector of heavy-light quarks, charmonium and bottomonium. The predicted mass of $\eta_b$ is in agreement with the subsequent observation by BaBar Collaboration. A discussion of heavy tetraquark masses is also presented, motivated by the possibility of a diquark-antidiquark structure for some states. The decay constants of charmonium and bottomonium are determined: they control the processes $\eta (nS)_{c/b}\rightarrow\gamma\gamma$ and $\psi(nS)/\Upsilon(nS)\rightarrow \ell\bar \ell$. Finally, the masses of baryons comprising two heavy quarks are computed in the same model, assuming a quark-diquark scheme; these states are predicted to exist by the quark model, but so far there is only one experimental candidate, $\Xi_{cc}$, observed by the Selex Collaboration. based on: Eur.\ Phys.\ J.\ C {\bf 57}, 569 (2008) Phys.\ Rev.\ D {\bf 78}, 117501 (2008) arXiv:0902.4624 [hep-ph], to appear on Phys.\ Rev.\ D {\bf 79}, 094002 (2009)
Speaker: Floriana Giannuzzi (University of Bari and INFN)
• 5:10 PM
g_B*Bpi coupling in the static heavy quark limit 20m
It is common to use the Heavy Meson Chiral Perturbation Theory to modelise the transitions involving heavy mesons and soft pions. The corresponding effective Lagrangian has few couplings: one of them is g_B*Bpi parameterising the transition between B, B* and a soft pion. As the process B* --> B pi is forbidden kinematically, the coupling is not accessible to experiment and has to be determined non perturbatively. In this talk I will present a recent extraction of that coupling in the static heavy quark limit by means of lattice simulations of QCD in which the effect of Nf=2 dynamical quarks have been taken into account and whose the lattice spacings are sufficiently small to allow a reasonable control on cut-off effects.
Speaker: Dr Benoit Blossier (CNRS)
• 5:30 PM
Strangeness Production in Deep-Inelastic ep Scattering at HERA 20m
The production of strange hadrons is investigated using deep-inelastic scattering events measured with the H1 detector at HERA. The measurements of K_s and Lambda production are performed in two regions of phase space defined by the negative four-momentum transfer squared of the photon Q^2. The K_s and Lambda production cross sections and their ratios are determined and presented differentially as a function of several kinematical variables. The K_s production rate is compared to the production of charged particles in the same region of phase space. In addition, the Lambda - Anti-Lambda asymmetry is measured. The production of K*(892) vector mesons in deep-inelastic scattering at low Q^2, observed through the decay chain K*+- --> K0s pi+-, is measured for the first time at HERA. The analysis is based on data taken in the HERA-II running period. Inclusive cross sections are presented as a function of the transverse momentum squared P_T*^2, the rapidity y* and the centre-of-mass energy W of the hadronic final state. The data are compared to theoretical predictions, based on leading order Monte Carlo programs with parton showers.
Speaker: Julia Ruiz Tabasco (Cinvestav - Unidad Mérida)
• 5:50 PM
Measurement of charged particle spectra in pp collisions at CMS 20m
We present the plans of the CMS collaboration to measure cross sections and differential yields of charged particles (unidentified or identified pions, kaons and protons) produced in inelastic proton-proton collisions at center-of-mass energy of 14 TeV. The measurements of these basic observables could also serve as an important tool for calibrating and understanding the CMS detector at start-up. The tracking of very low transverse momentum charged particles will be possible down to about 100 MeV/c, with good efficiency and negligible fake rate. Charged hadrons can be identified down to 0.8 and 1.5 GeV/c total momentum for kaons and protons, respectively. Comparisons of the results to various theoretical models are also discussed.
Speaker: Mr Krisztian Krajczar (Eotvos University)
• 9:00 AM 6:15 PM
VII. Standard Model Electroweak Physics Middle Lecture Hall A

### Middle Lecture Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
• 9:00 AM
WINHAC - the Monte Carlo event generator for single W-boson production in hadronic collisions 18m
The charged-current Drell-Yan process, i.e. single W-boson production with leptonic decays in hadronic collisions, will play an important role in the experimental programme at the LHC. It will be used for improved measurements of some Standard Model parameters (such as the W-boson mass and widths, etc.), for better determination of the Higgs-boson mass limits, in "new physics' searches, as a "standard candle" process, etc. In order to achieve all these goals, precise theoretical predictions for this process in terms of a Monte Carlo event generator are indispensable. In this talk the Monte Carlo event generator WINHAC for the charged-current Drell-Yan process will be presented. It features higher-order QED corrections within the exclusive Yennie-Frautschi-Suura exponentiation scheme with the 1st order electroweak corrections. It is interfaced with PYTHIA for QCD/QED initial-state parton shower as well as hadronization. It includes options for proton-proton, proton-antiproton and nucleus-nucleus collisions. Moreover, it allows for longitudinally and transversely polarized W-boson production. It has been cross-checked numerically to high precision against independent programs/calculations. Some numerical results from WINHAC will also be presented. Finally, interplay between QCD and electroweak effects will briefly be discussed.
Speaker: Prof. Wieslaw Placzek (Marian Smoluchowski Institute of Physics, Jagiellonian University)
• 9:18 AM
Electroweak corrections to W+jet hadroproduction including leptonic W-boson decays 18m
We present the first calculation of the next-to-leading order electroweak corrections to W-boson + jet hadroproduction including leptonic W-boson decays. The W-boson resonance is treated consistently using the complex-mass scheme and all off-shell effects are taken into account. The corresponding next-to-leading order QCD corrections have also been recalculated. All the results have been implemented in a flexible Monte-Carlo code. Numerical results for cross sections and distributions of this standard model benchmark process are presented for the Tevatron and the LHC.
Speaker: Dr Alexander Mueck (Paul Scherrer Institut)
• 9:36 AM
W and Z boson production (CDF) 18m
Precise studies of distributions and asymmetries in W and Z production offer constraints on the parton content of protons. Improving the knowledge of parton content can help avoid systematic limitations in measuring the mass of the W boson. Measurements of Z rapidity and W charge asymmetry in fb-1 samples are presented.
Speaker: Dr Krzysztof Sliwa (Tufts University)
• 9:54 AM
W & Z boson production (D0) 18m
We present measurements conducted at D0 that involve W and Z boson production. The talk includes the measurement of the W charge asymmetry where W decays into an electron and a neutrino; a study of Z at low momentum where Z decays into electrons or muons, done using a novel technique; and precise measurement of the forward-backward asymmetry in both di-muon and di-electron channels.
Speaker: Dr David Khatidze (Brown University)
• 10:12 AM
W & Z boson production (LHC) 18m
The LHC is a discovery machine. Both CMS and ATLAS detectors are ready for collecting the first data from the pp collisions. Electroweak measurements is an important tool to demonstrate the detectors physics performance and to understand new physics scenarios since W & Z bosons are the building block of some of them . This talk is focused in the study of the W & Z boson production with the early data, the study of Z forward-backward asymmetry and the W charge assymetry
Speaker: Dr Aristotelis Kyriakis (NCSR Demokritos)
• 10:30 AM
coffee break 30m
• 11:00 AM
NNLL Electroweak Corrections to Gauge Boson Pair Production at LHC 18m
The high energy behaviour of electroweak corrections to gauge boson pair production at LHC is presented. Using the evolution equation approach, the logarithmically enhanced contributions up to NNLL to all order in perturbation theory are derived. On the basis of this result the two-loop NNLL for partonic and hadronic cross section are obtained. Explicit results for W-pair production are presented.
Speaker: Dr Sandro Uccirati (TTP Karlsruhe)
• 11:18 AM
Diboson Production at D0 18m
We present recent diboson production measurements from the D0 experiment at Fermilab's Tevatron collider. The production of ZZ has been observed using leptonic final states. Zgamma production has been observed and used to set the most stringent limits from a hadron collider on anomalous Zgammagamma and ZZgamma trilinear gauge couplings (TGCs). WW and WZ events with semi-leptonic final states are used to set limits on anomalous WWZ and WWgamma TGCs. Lastly, we present limits on anomalous WWZ and WWgamma TGCs obtained from a combination of the fully-leptonic Wgamma, WW, and WZ channels and the semi-leptonic WW and WZ channels, giving the most stringent limits from a hadron collider.
Speaker: Dr Joseph Haley (For the D0 Collaboration)
• 11:36 AM
Diboson production (CDF) 18m
WW and WZ production in pbar p collisions at 1.96 TeV are studied in samples of ~3 fb-1 of data using leptons, jets and missing Et. Fully leptonic decays as well as semi-leptonic decays are measured. Diboson production is expected in the standard model, and predicted cross sections are confirmed. It is important to investigate various signatures as associated production of Higgs bosons is topologically similar.
Speaker: Ms Viviana Cavaliere (CDF Collaboration, INFN Pisa, University of Siena)
• 11:54 AM
Measurement of Di-Boson production at LHC 18m
Di-Gauge Boson in the LHC will be discussed. The measurements of cross sections and triple gauge couplings(TGC) at early stage of data taking will be described as well as di-boson polarization and TGC at high luminosity. The selection for the cross section measurements will be shown as well as the transverse mass variable used for the WW TGC measurement. A comparison between LHC limits and limits obtained from the Tevatron and LEP2 will be shown. For the case of the ZZ and WZ polarization measurements the reconstruction of the decay angle used for extracting the polarization will be discussed and the lonigitudinal polarization will be shown as a function of the centre of mass energy. All results were achieved by using the full detectors simulation program.
Speaker: Dr Eyal Brodet (Tel-Aviv University)
• 12:12 PM
Sensitivity to anomalous quartic gauge couplings in photon-photon interactions at the LHC 18m
The exclusive two-photon production at the LHC of pairs of W and Z bosons provides a novel and unique test-ground for the electroweak gauge boson sector. In particular it offers, thanks to high gamma-gamma center-of-mass energies, large and direct sensitivity to the anomalous quartic gauge couplings otherwise very difficult to investigate at the LHC. An initial analysis has been performed assuming leptonic decays and generic acceptance cuts. Simulation of a simple counting experiment has shown for the integrated luminosity of 10 fb-1 at least four thousand times larger sensitivity to the genuine quartic couplings, a_0^W, a_0^Z, a_C^W and a_C^Z, than those obtained at LEP. The impact of the unitarity constraints on the estimated limits has been studied using the dipole form-factors. Finally, differential distributions of the decay leptons have been provided to illustrate the potential for further improvements of the sensitivities.
Speaker: Prof. Krzysztof Piotrzkowski (UCLouvain)
• 12:30 PM
lunch break 2h
• 2:30 PM
Top-Quark Production at Hadron Colliders 25m
The study of the properties of the top quark is one of the main goals of the Large Hadron Collider (LHC) physics program. The experimental precision expected at the LHC requires the knowledge of several top-quark related observables beyond leading order in the strong coupling constant. In this talk I briefly review the status of the theoretical predictions for the top-quark production processes at hadron colliders. Special attention will be devoted to recent progress in the calculation of NNLO corrections to the top-quark pair production cross section.
Speaker: Dr Andrea Ferroglia (Johannes Gutenberg Univestitaet Mainz)
• 2:55 PM
Top cross section/SM properties (D0) 18m
We present the measurement of the top anti-top quark pair production cross section in dilepton, lepton+jets and tau+lepton final states using up to 4 fb^-1 of data collected with the D0 detector at the Fermilab Tevatron collider. We also present the combination of these channels and extract the top quark mass comparing the measured cross section to calculations in higher order QCD. Furthermore we study properties of the top quark decay products such as helicity fractions of the W bosons. W boson helicity fractions are also sensitive to the ratios of different anomalous Wtb couplings. We set simultaneous limits on left-handed vector and right-handed vector, and left-handed vector and right-handed tensor Wtb couplings and combine this with results from a search for anomalous Wtb couplings in single top production.
Speaker: Dr Sebastien GREDER (IPHC, Strasbourg, France)
• 3:13 PM
Top cross section and SM properties at CDF 18m
With the large dataset accumulated by CDF (more than 3 fb-1), we are able to make stringent tests on the properties of top quark. By studying production rates and distributions sensitive to the production and decay mechanisms of top quarks, we can search for contamination from non-standard model particles, or subtle differences in the electroweak or strong interactions that govern top quark interactions. We are able to measure the top cross section in many different decay channels with unprecedented precision, and uncertainties comparable to those of theoretical predictions. We will present the most recent measurements along with their combined result. We will also present the most recent and precise measurements of other properties of the top quark such charge, lifetime, width, and more carried out by the CDF collaboration at Fermilab. Three CDF measurments of the transverse polarization of W bosons from top decays have tested the V-A nature of the weak interaction. We have set the most stringent limits on the existence of V+A coupling in top decays, which is predicted by some models of new physics.
Speaker: Dr Alison Lister (University of Geneva)
• 3:31 PM
Top Cross Section and properties measurements at LHC 18m
The top quark will be a fundamental element of the early physics program at the Large Hadron Collider (LHC). The LHC unparalleled energy of the proton-proton collisions and large top quark production may provide an improved reach in several top quark measurements. We will show the expected performance of the ATLAS and CMS experiments with a focus on the early measurements of the top pair and single top production. The LHC prospects of the measurement of the Vtb element of the Cabibbo-Kobayashi-Maskawa (CKM) from top pairs and single top will be discussed. We will also describe the LHC potential for the study of the top quark properties and physics beyond the Standard Model coupled to the top quark sector, discussing the measurements of the top quark charge, spin, spin correlation, new heavy gauge bosons and decays related to flavor changing neutral currents. The sensitivity of the ATLAS and CMS experiments wll be analyzed under different scenarios of LHC center of mass energy and integrated luminosity.
Speaker: Dr Luca Fiorini (IFAE)
• 3:49 PM
Search for single top production at HERA 15m
Searches for single-top production at the $ep$ collider HERA has been performed using data collected by the H1 and ZEUS Collaborations. The H1 collaboration analyzed the full HERA data sample corresponding to an integrated luminosity of 474 pb^-1 looking both at the leptonic and hadronic decay of the W coming from top decay. The ZEUS collaboration analyzed data collected in the running period 2004-2007 corresponding to an integrated luminosity of 277 pb^-1 looking at the leptonic W decay. New ZEUS results have been also combined with a previous search performed with data collected in 1998-2000 for a total integrated luminosity of 359 pb^-1. The results of the searches have been used to constrain single-top production via flavour changing neutral current (FCNC) transitions. In case of u-t transition mediated by a photon, the HERA constraints are the best to date.
Speaker: Dr Lorenzo Bellagamba (INFN Bologna)
• 4:04 PM
coffee break 26m
• 4:30 PM
Observation of single top at CDF 15m
We present observation of electroweak single top quark production using 3.2 fb-1 of data collected by the CDF experiment. Candidate events are selected for further classification by five parallel analysis techniques: one using a likelihood discriminant, one using a matrix-element discriminant, one using decision trees, one using a neural network, and one using a complementary dataset. The results of these analyses are combined in order to improve the expected sensitivity. The signicance of the observed data is 5.0 standard deviations, and the expected sensitivity is in excess of 5.9 standard deviations. We also present the most current value of the CKM matrix element Vtb. Finally we present the most precise results on a separate search for s-channel and t-channel single top quark production at CDF.
Speaker: Mr Bruno Casal Laraña (Instituto de Fisica de Cantabria (CSIC - U. Cantabria))
• 4:45 PM
Observation of Single Top Quark Production with the D0 Detector 15m
We report first observation of the electroweak production of single top quarks in ppbar collisions at sqrt(s) = 1.96 TeV based on 2.3 fb^-1 of data collected by the D0 detector at the Fermilab Tevatron Collider. Using events containing an isolated electron or muon and missing transverse energy, together with jets originating from the fragmentation of b quarks, we measure a cross section of sigma(ppbar -> tb + X, tqb + X) = 3.94 +- 0.88 pb. The probability to measure a cross section at this value or higher in the absence of signal is 2.5 x 10^-7, corresponding to a 5.0 standard deviation significance for the observation.
Speakers: Reinhard Schwienhorst (Michigan State University), Prof. Reinhard Schwienhorst (Michigan State University)
• 5:00 PM
Searches for New Physics in the Top Quark Sector at CDF 20m
Fifteen years following the first glimpses of the top quark at Fermilab's Tevatron, physicists are now able to explore top quark physics with substantial precision. With 40 times the data of Run 1, we are learning much about the nature of this peculiarly heavy quark, and we are looking for hints of physics beyond the Standard Model in the top quark sector. We present exciting new results on searches for new physics in the top quark sector at CDF, in which we constrain possibilities for new physics mimicking top quarks in our data sample, and look for anomalous top quark properties. In particular we set limits on the production of of a 4th generation top-like quark, which also constrains models such as little Higgs with T-parity, Beautiful Mirrors, and massive KK gluons. Constraints from baryogenesis indicate that SUSY stop could be lighter than the top quark. Such stop signatures can be very similar to those from top events, and we place the first limits on these signatures. In addition, we present searches for resonant top production, as well as a measurement of the top quark forward-backward asymmetry, which is a test of discrete symmetries and strong interactions at large Q^2, and use this to search for massive Z'-like bosons or axi-gluons. Some of these new results are tantalizing, and indicate that the Tevatron data are as interesting as ever.
Speaker: Prof. Robin Erbacher (Univ. of California, Davis)
• 5:20 PM
Beyond the SM searches with top (D0) 20m
The top quark is the heaviest elementary particle known today. It is therefore an excellent candidate to search for new physics. We present searches for physics beyond the Standard Model involving top quarks. The analysed data corresponds to up to 4 fb^-1 of integrated luminosity, collected by the D0 detector at the Femilab Tevatron collider. We present various searches for new physics in the production of single top quarks such as searches for W' bosons and charged Higgs bosons. We also discuss searches in the production of top quark pairs such as searches for new resonances, Higgs bosons produced in association with top-antitop quark pairs and present a measurement of a forward backward asymmetry. Furthermore, we present a simultaneous measurement of the ratio of branching fractions, R=B(t -> Wb)/B(t -> Wq), with q being a d, s, or b quark, and search for new particles in top quark decays, such as charged Higgs bosons. We set limits in various supersymmetric models.
Speaker: Dr Yvonne Peters (University of Manchester)
• 5:40 PM
Beyond the SM searches with top (LHC) 20m
The top quark is the only known fermion with a mass of the order of the Electroweak Symmetry Breaking Scale. New Physics, beyond the Standard Model, might be probed by studying the production of the top quark in proton-proton collisions at high energies in the new hadron collider, the LHC. High mass resonances, extra-dimensions, new flavor dynamics, 4th generation of quarks are some of the possibilities to be explored. Specific experimental techniques for event reconstruction and for background control are required to probe the new physics that might underly beneath top quark events. In this talk an overview of some of these experimental techniques is given along with the expected sensitivity of the CMS and ATLAS experiments to new physics scenarios that might influence the production of the top quark at the LHC.
Speaker: Pedro Ferreira da Silva (LIP / CMS)
• 6:00 PM
A new top jet tagging algorithm for highly boosted top jets 15m
A new top jet tagging algorithm ({\tt CATopTag}) is presented, that uses the Cambridge-Aachen jet finding algorithm to decompose highly boosted top jets into subjet components and examine kinematics of those subjets. It is found that this algorithm has a rejection rate of approximately 98\% for non-top jets with $p_T = 600$ GeV/$c$, while retaining approximately 46\% of top jets with $p_T > 600$ GeV/$c$.
Speaker: Mr Salvatore RAPPOCCIO (Johns Hopkins University)
• 2:30 PM 6:00 PM
IV. Heavy Ions Small Hall

### Small Hall

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
• 2:30 PM
Search for the QCD critical point at SPS energies 15m
Theoretical calculations locate the QCD critical end point at energies accessible at the CERN Super Proton Synchrotron (SPS). The QCD phase diagram (T - \mu_B) can be scanned by changing the energy and the size of the colliding system. Several observables were suggested to look for the critical point in ultra-relativistic heavy ion collisions. In the NA49 experiment we studied the energy dependence of such observables for central Pb+Pb collisions at beam energies 20A-158A GeV, and the system size dependence with p+p, C+C, Si+Si, and Pb+Pb collisions at the highest SPS energy. In this talk we will show the system size dependence of event-by-event mean transverse momentum and multiplicity fluctuations as well as the system size dependence of the signal of intermittency in transverse momentum space. For the energy dependence we will present mean transverse momentum and multiplicity fluctuations, anisotropic flow (v_2), and antibaryon to baryon spectra. Finally, the critical point search strategy in the future NA61/SHINE experiment will be discussed.
Speaker: Dr Katarzyna Grebieszkow (Warsaw University of Technology)
• 2:45 PM
Strong and Electromagnetic Interactions at SPS Energies 15m
Particle production in Pb-Pb collisions and hadron-induced reactions has been measured at a beam energy of 158 GeV per nucleon. The measurements provide full double differential coverage in a wide range of longitudinal and transverse momenta, including the central (mid-rapidity'') area and extending far into the projectile fragmentation region. The resulting analysis shows the heavy-ion reaction as a mixture of different processes. On one hand, the transition from the elementary (proton-proton) to the nuclear (Pb-Pb) collision induces a visible modification of produced particle spectra. This effect is particularly important at higher transverse momenta. On the other hand surprising phenomena, like the presence of large and strongly varying structures in the shape of the double differential cross section d^2sigma/dx_Fdp_T, are induced by the final state electromagnetic interaction between produced particles and the charged spectator system. This effect is largest in peripheral collisions and at low transverse momenta, where it results in a deep valley in the x_F-dependence of the produced pi+/pi- ratio. The basic characteristics of the electromagnetic phenomenon described above agree with these presented in an earlier theoretical work [1,2]. Versatile information on the heavy-ion reaction mechanism becomes therefore available. In particular, the electromagnetic effect is sensitive to the initial conditions of particle production (time of final state hadron emission, distance of the formation zone from the two spectator systems, size of the emission source). As a result, it provides new information on the space and time evolution of the particle production process. [1] A.Rybicki, A.Szczurek, Phys.Rev.C75 (2007) 054903 [2] A.Szczurek, A.Rybicki, A.Gorski, J.Phys.G34 (2007) S827
Speaker: Dr Andrzej Rybicki (H.Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences)
• 3:00 PM
Recent results from the CERN NA60 experiment 20m
NA60 has measured dimuon production in In-In collisions at the CERN SPS at 158 GeV/nucleon, and in p-A at 158 and 400 GeV. Highlights from the results of NA60 include the first measurement of the rho spectral function in nuclear collision, the production of thermal muon pairs in the invariant mass region between the $\phi$ and the J/$\psi$, and the study of the J/$\psi$ suppression. In this talk we will concentrate on recent results, such as the polarization of the continuum excess, the comparison of phi->mumu and phi->KK results (the phi puzzle) and in particular on the first measurement of cold nuclear matter effects on J/$\psi$ production at 158 GeV and on the consequences for our understanding of the anomalous J/$\psi$ suppression in nuclear collisions.
Speaker: Dr Pietro Cortese (Universita' del Piemonte Orientale in Alessandria and INFN of Torino)
• 3:20 PM
Charmonium resonance production from quark coalescence 15m
We have considered a relativistically invariant quark coalescence model to predict hadronic resonance productions in heavy ion collisions. We extended our model - which has been applied earlier for strange and non-strange hadrons - to describe charmonium meson ratios, namely J/psi, Psi' and xi_c, at RHIC energies. In the applied quark coalescence model the widths of the produced mesons and resonances plays an important role and determines the yield of these particles. In the charm sector the values of meson width have a special structure, which feature enhances the importance of meson width and the effective gluonic widening in the population of the different charmonia channels. We display our numerical results at RHIC energies.
Speaker: Mr Gergo Hamar (MTA KFKI RMKI Research Institude for Particle and Nuclear Physics)
• 3:35 PM
Probing charm production in high-energy nuclear collisions 15m
Lattice QCD predicts that, above a certain critical energy density or temperature, strongly interacting matter undergoes a phase transition from the hadronic world to a quark-gluon plasma state, where the colored quarks and gluons are no longer bound to colorless hadrons. The suppression of quarkonium production in high-energy nuclear collisions is one of the most interesting signatures of QGP formation, for two reasons: due to their large masses, charm and beauty quarks are created only in the initial hard scattering processes, before the QGP is formed; and the Q-Qbar binding potential should be screened in the deconfined color medium. Until the LHC starts colliding Pb nuclei, charm is the heaviest quark that can check the validity of the finite temperature QCD predictions, given the much smaller beauty production cross sections. However, the interpretation of the presently available results on charmonium suppression, obtained at the SPS and RHIC, is hampered by a multitude of other “nuclear effects”. Measurements of the D meson production yield and its dependency on collision centrality and energy are very valuable in this context. In particular, the ratio between the J/psi and the DDbar production yields is insensitive to initial state effects, such as the very badly known nuclear modifications of the gluon distribution functions and the energy loss of the partons which interact to produce the c-cbar pair. However, it is exceedingly difficult to reconstruct the hadronic decays of the D mesons in the high-density track environment of a high-energy nuclear collision. This explains why almost all available experimental data on charm production in heavy-ion collisions comes from studies of correlated semi-leptonic decays of pairs of charmed mesons. This talk will review the available SPS and RHIC open charm measurements, expose the respective puzzles, and discuss some paths towards their solution.
Speaker: Torsten Dahms (CERN)
• 3:50 PM
EMC Effect in Heavy Ion Collision 15m
Recent data in heavy ion collisions show suppression at high transverse momenta, which might be identified as the EMC effect. The influence of nuclear parton distribution functions (nPDFs) on high-$p_T$ hadron production in deuteron-gold $dAu$ collisions at RHIC was investigated using a pQCD-improved parton model and several different parameterizations of nuclear PDFs, including the latest HKN and EPS09. We study whether the EMC suppression of nuclear PDFs is responsible for the observed suppression of high-$p_T$ $\pi^0$ and $\gamma$ production in $dAu$ collisions. We did a slope analysis Theoretical uncertainties in the nuclear modification factor, $R_{dAu}$ resulting from uncertainties in the PDF fits and from pQCD scale uncertainties are evaluated uniquely. We have also checked, the possibility that final-state energy loss of jets could also contribute to the observed suppression is evaluated using a simplistic implementation of the GLV energy loss model.
Speaker: Dr Gergely Gabor Barnafoldi (MTA KFKI RMKI)
• 4:05 PM
coffee break 25m
• 4:30 PM
The BRAHMS results on the proton-to-pion ratio pT-dependence in the RHIC range of baryo-chemical potential 20m
The BRAHMS results on the proton-to-pion ratio pT-dependence in the RHIC range of baryo-chemical potential N. Katryńska, Z. Majka (for the BRAHMS Collaboration) BRAHMS measurement of proton-to-pion ratios in Au+Au and p+p at (s NN) ½ = 62.4 GeV and 200 GeV will be presented as a function of transverse momentum and collision centrality within the pseudorapidity range 0 < η < 3. The baryo-chemical potential, μB, for the indicated data spans from μB ~ 25 MeV ( (s NN) ½ = 200 GeV, η = 0) to μB ~ 260 MeV ((s NN) ½ = 62.4 GeV, η ~ 3) [1]. A striking agreement between p/π(p T) ratio measured for Au+Au collisions at (s NN) ½ = 200 GeV (η ~ 2.2) and at (s NN) ½ = 62.4 GeV (η ~ 0) is observed, where the properties of the bulk medium can be described with the common value of μB = 65 MeV. The p/π ratio for Au+Au system at (s NN) ½ = 62.4 GeV, η ~ 3 reaches astounding value of 8-10 at pT = 1.5 GeV/c. For these energy and pseudorapidity interval no centrality dependency of p/π ratio is observed. Comparison of the measured p/π+ and pbar/π- ratios at different beam energies and rapidities with theoretical models [2,3,4] will be provided. [1] I. Arsene, Quark Matter Conference 2006, Shanghai, China, November 14-22, 2006. [2] R. C. Hwa and C. B. Yang, Phys.Rev. C 78, (2008) 024907. [3] W. Broniowski, B. Biedroń, Phys. Rev. C 75, (2007) 054905. [4] Lin, Zi-Wei, Phys. Rev. C 72, (2005) 064901.
Speaker: Dr Pawel Staszel (Jagiellonian University)
• 4:50 PM
Properties of the matter created in heavy ion collisions – results from the PHOBOS experiment 20m
In the collisions of ultrarelativistic heavy ions the energy of the nuclei is released in a small volume leading to the creation of a hot and dense nuclear matter. The study of the particles produced from it gives the information on the conditions in the early stage of the collision and the evolution of the system. The PHOBOS experiment provides unique data on the particle production in the almost full phase space and down to very small transverse momenta. The talk will present an overview of recent results from the PHOBOS experiment. The extensive studies of charged particles production are based on the multiplicity measurements in a very wide pseudorapidity range and reveal strong short and long range correlations. Their dependence on the collision centrality for the two colliding systems: Au+Au and Cu+Cu is analyzed. In addition both the high and very low pT distributions, the particle ratios and elliptic flow results will be shortly presented.
Speaker: Dr Krzysztof Wozniak (Institute of Nuclear Physics PAN, Krakow, Poland)
• 5:10 PM
Exploring the QCD medium with the PHENIX experiment at RHIC 20m
High energy nucleus nucleus collisions produce extraordinarily hot and dense QCD matter which exhibits near-perfect fluid behavior and interacts strongly. This talk will present recent results from the PHENIX experiment at RHIC on the dynamical evolution of the medium and its response to high momentum probes. Their impact on our overall understanding of heavy-ion collisions will be discussed.
Speaker: Prof. Julia Velkovska (Vanderbilt University)
• 5:30 PM
Flow, spectra and HBT radii in Heavy-Ion collisions 15m
Recent 3+1D hydrodynamic calculations modeling the expansion of the dense matter created in Heavy-Ion collisions at RHIC energies are presented. Assuming a relatively early start up time of the collective expansion and a hard equation of state, we are able to reproduce particle spectra at different centralities and rapidities, elliptic flow as function pseudorapidity, HBT radii and directed flow as function of pseudorapidity. The quantitative description of all 3 HBT radii caused difficulties for some of the previous calculations. The directed flow at these energies, including its scaling with the size of the colliding system, is described for the first time in a dynamic model. P. Bozek and I. Wyskiel, Phys. Rev. C 79, 044916 (2009) P. Bozek and I. Wyskiel, arXiv:0903.3129 [nucl-th]
Speaker: Piotr Bozek (Institute of Nuclear Physics PAN Krakow/Rzeszow University)
• 5:45 PM
Bjorken Flow of the Quark-Gluon Plasma and Gauge/Gravity Correspondence 15m
The contribution presents a brief summary of the Gauge/Gravity approach to the study of hydrodynamic flow of the quark-gluon plasma formed in heavy-ion collisions, in a boost-invariant setting (Bjorken flow). Considering the ideal case of a supersymmetric Yang-Mills theory for which the AdS/CFT correspondence gives a precise form of the Gauge/Gravity duality, the properties of the strongly coupled expanding plasma are put in one-to-one correspondence with the metric of a 5-dimensional black hole moving away in the 5th dimension and its deformations consistent with the relevant Einstein equations. Several recently studied aspects of this framework are recalled and put in perspective. New results in collaboration with Guillaume Beuf and Michal Heller on the early time expansion towards the hydrodynamical regime will be sketched.
Speaker: Dr Robi Peschanski (IPhT, Saclay)
• Friday, July 17
• 9:00 AM 6:10 PM
I. Neutrino Physics Middle Lecture Hall B

### Middle Lecture Hall B

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
• 9:00 AM
KATRIN: an experiment to determine the neutrino mass 15m
The KArlsruhe TRItium Neutrino (KATRIN) experiment is a next generation, model independent, large scale tritium-beta-decay experiment to determine the mass of the electron anti-neutrino by investigating the kinematics of tritium beta decay with a sensitivity of 0.2 eV/c². The measurement setup consists of a high luminosity windowless gaseous molecular tritium source (WGTS), a differential and cryogenic pumped electron transport and tritium retention section, a tandem spectrometer section (Pre-Spectrometer and Main Spectrometer) for energy analysis, followed by a detector system for counting transmitted beta decay electrons. To achieve the desired sensitivity the WGTS, in which tritium decays with an activity of 10e11 Bq, needs to be stable on the 0.1% level in injection pressure and temperature at an absolute value of 27K. With the capability to create an axial magnetic field of 3.6T the WGTS is going to be one of the world’s most complex superconducting magnet & cryostat systems. The Main Spectrometer (length 24m, diameter 10m), which works as a retarding electrostatic spectrometer, will have an energy resolution of 0.93eV at 18.6keV. The retarding potential of -18.6kV needs to be stable at the 1ppm level. In order to reach the background level needed to achieve the sensitivity, it will be operated at a pressure of 10e-11mbar. The talk will give an overview of the actual status of the project.
Speaker: Mr Florian Fraenkle (Karlsruhe Institute of Technology)
• 9:15 AM
Search for double beta decay with NEMO-3 20m
The NEMO-3 experiment located in the Modane Underground Laboratory (LSM) is searching for neutrinoless double beta decay. The experiment has been taking data since 2003 with seven isotopes. The main ones are 7 kg of 100Mo and 1 kg of 82Se. Data from the initial phase of the experiment show no evidence for neutrinoless double beta decay which permits setting a 90% CL lower limit on the half-life time for such a transition. From these results we can determine an upper limit on the effective Majorana neutrino mass. NEMO-3 also measures two-neutrino double beta decays for other isotopes and has reached the highest precision measurements to date. We will present the latest results for 150Nd, 130Te, 48Ca and 96Zr. Such measurements are important for reducing the uncertainties on calculations for nuclear matrix elements. NEMO-3 data can also be interpreted in terms of alternative transition models, such as weak right-handed currents or Majoron emission.
Speaker: Dr Vera Beillet-Kovalenko (IPHC/JINR)
• 9:35 AM
Search for neutrinoless double beta decay of Ge-76 with the GERmanium Detector Array "GERDA" 20m
The study of neutrinoless double beta decay (DBD) is the most powerful approach to the fundamental question if the neutrino is a Majorana particle, i.e. its own anti-particle. The observation of neutrinoless DBD would not only establish the Majorana nature of the neutrino but also represent a determination of its effective mass if the nuclear matrix element is given. So far, the most sensitive results have been obtained with Ge-76, and the group of Klapdor-Kleingrothaus has made a claim of discovery. Future experiments have to reduce radioactive backgrounds to increase the sensitivity. "GERDA" is a new double beta-decay experiment which is currently under construction in the INFN Gran Sasso National Laboratory, Italy. It is implementing a new shielding concept by operating bare Ge diodes - enriched in Ge-76 - in high purity liquid argon supplemented by a water shield. The aim of "GERDA" is to verify or refute the recent claim of discovery, and, in a second phase, to achieve a two orders of magnitude lower background index than recent experiments, increasing the sensitive mass and reaching exposure of 100 kg yr. It be will discuss design, physics reach, and status of construction of "GERDA", and present results from various R&D efforts including long term stability of bare Ge diodes in cryogenic liquids, material screening, cryostat performance, detector segmentation, cryogenic precision electronics, safety aspects, and Monte Carlo simulations.
• 9:55 AM
Status of Cuore experiment and last results from Cuoricino 20m
CUORE is a cryogenic-bolometer detector consisting of 988 TeO2 crystals, 750 g each, operated at a temperature of 10 mK, currently under construction in Gran Sasso Underground Laboratory. Its goal is to search for neutrinoless double beta decays with a sensitivity to the effective neutrino mass as low as a few tens of meV. CUORICINO, its pilot experiment, has proven the feasibilty of CUORE, setting moreover the current lower limit on the lifetime of 130Te for neutrinoless double beta decay: we report on the up-to-date CUORICINO results and discuss the prospects for CUORE.
Speaker: Dr Elena Guardincerri (INFN Genova)
• 10:15 AM
Double Chooz experiment 15m
Double Chooz will use two identical detectors at different distances from the Chooz nuclear power station to search for a non-vanishing value of $\theta_{13}$, and, hopefully, to open the way to experiments aspiring to discover CP violation in the leptonic sector. The far detector is expected to be operative by the end of 2009. Installation of the near detector will occur in 2010. Double Chooz has the capacity to exclude $sin^2(2\theta_{13})<0.03$ at 90% C.L. for $\Delta m_{31}^2 = 2.5 \times 10^{-3} eV^2$ with three years of data running both near and far detectors.
Speaker: Dr Carmen Palomares (CIEMAT)
• 10:30 AM
coffee break 30m
• 11:00 AM
The Daya Bay Reactor Neutrino Oscillation Experiment 15m
The Daya Bay reactor neutrino experiment aims to measure the last unknown neutrino mixing parameter $\theta_{13}$ with a sensitivity of $\sin^22\theta_{13} < 0.01$ at 90\% C.L. The experiment will measure the flux and energy spectrum of reactor antineutrinos through the inverse beta-decay reaction on protons with three sites at different distances from the reactor cores. This measurement will provide a better understanding of the neutrino mixing matrix and will also give direction to future experiments probing CP violation in the lepton sector and the neutrino mass hierarchy. An overview, current status, and schedule of the experiment will be presented.
Speaker: Mr Viktor Pec (IPNP Charles University in Prague)
• 11:15 AM
Last Borexino Result 20m
Borexino is a large-volume liquid scintillator detector placed in the underground halls of the Laboratori Nazionali del Gran Sasso in Italy. It is able to detect in real time neutrino interactions below 2 MeV, due to the very high radio-purity reached by the detector. The interaction rate of the 0.862 MeV 7Be neutrinos is 49±3stat±4syst counts/(day•100 ton) , in agreement with the oscillation hypothesis in the MSW Large Mixing Angle scenario. Our result is the first direct measurement of the survival probability for solar νe in the transition region between matter-enhanced and vacuum-driven oscillations.
Speaker: Dr Marcin Misiaszek (Jagellonian University)
• 11:35 AM
MiniBooNE experiment: recent results and future plans 20m
MiniBooNE is the neutrino oscillation experiment located at Fermi National Accelerator Laboratory in Batavia, USA. The main goal of this experiment is to confirm or reject the evidence for muon to electron anti-neutrino oscillations seen by LSND experiment at LANL. First neutrino events were detected in 2002 and since then MiniBooNE obtained many interesting results including the low-energy excess of electron neutrinos over the background which is still not understood. My talk will describe production and detection of neutrinos at MiniBooNE as well as event selection and analysis techniques. I will then present recent cross-section and oscillation results and briefly go over the future plans.
Speaker: Dr Bari Osmanov (University of Florida/Fermilab)
• 11:55 AM
Recent Results from the MINOS Experiment 20m
The MINOS experiment utilizes the NuMI beam of muon neutrinos to study the phenomenon of neutrino oscillations. Neutrinos are sent over a baseline of 735 km, with a detector near the production point at Fermilab and one at the Soudan underground laboratory in northern Minnesota. By measuring the disappearance characteristic of oscillations, MINOS has made the best measurement of the atmospheric neutrino mass splitting to date. By looking for electron neutrino appearance, a limit has been placed on the the mixing angle sin^2(2*theta_13) of < 0.29 at 90% c.l. (for delta_CP = 0 and normal mass hierarchy). A study of neutral current interactions has allowed limits to be placed on the existence of additional, sterile neutrino flavours beyond the three of the standard oscillation model. Using the 7% muon antineutrino component of the beam, the first direct observation of muon antineutrinos in a long baseline experiment has been made, along with direct limits on the antineutrino oscillation parameters. In September 2009, the current in the NuMI focusing horns will be reversed to begin running with a dedicated antineutrino beam. This will allow the first precision measurements of the atmospheric-regime antineutrino oscillation parameters, an important test of CPT-invariance in the neutrino sector.
Speaker: Dr Justin Evans (University College London)
• 12:15 PM
Status of the OPERA neutrino experiment 20m
The OPERA long-baseline oscillation experiment is located in the underground Gran Sasso laboratory in Italy. OPERA has been designed to observe nu-mu -> nu-tau appearance in the CNGS nu-mu beam, 730 km away from its source at CERN. The apparatus consists of a large set of emulsion-lead targets combined with electronic detectors. First runs in 2007 and 2008 helped checking that detector and related emulsion facilities are fully operational and led to successful first analysis of collected data. The talk, after a short description of the OPERA setup, will present an updated status report on data reconstruction and analysis applied to present samples of neutrino events.
Speaker: Dr Henri PESSARD (LAPP-IN2P3-CNRS)
• 12:35 PM
lunch break 1h 55m
• 2:30 PM
Status of the T2K experiment 15m
T2K (Tokai-to-Kamioka) is a second generation long baseline neutrino experiment utilizing a newly built neutrino source with a MW class high energy proton accelerator complex (J-PARC neutrino facility), a near neutrino detector (ND280) to characterize the neutrino beam 280 meters from the source, and Super-Kamiokande as the far detector at 295 km. The primary motivation for T2K is the discovery of the nu_mu to nu_e conversion phenomena and, as a consequence, the finite value of the theta_13 mixing angle. It will also conduct a precise measurement of theta_23 and the mass difference of neutrino mass eigenstate. The ultimate goal for T2K is to establish the lepton flavor mixing structure. Construction of the J-PARC neutrino facility was completed in March 2009 and engineering operation of the T2K started as scheduled the following month. This talk will provide a general introduction to T2K, and present the current beam commissioning status and the status of preparations towards the start of the experiment in fall 2009.
Speaker: Dr Ken Sakashita (HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION, KEK)
• 2:45 PM
The International Design Study for the Neutrino Factory 15m
The International Design Study for the Neutrino Factory (the IDS-NF) has been established by the Neutrino Factory community to deliver the Reference Design Report (RDR) for the facility by the 2012 decision point identified by the Strategy Group of C.E.R.N. Council. The discovery reach of the Neutrino Factory will be presented and compared with alternative techniques (beta-beam and super-beam). The motivation for measurements of the neutrino-mixing parameters with a precision approaching that with which the quark-mixing parameters are known will be reviewed briefly. The baseline design for the facility will be described and its performance presented.
Speaker: Prof. Alain Blondel (DPNC university of Geneva)
• 3:00 PM
The LAGUNA project - towards the giant, liquid base detectors for proton decay searches and for low energy neutrino astrophysics. 15m
The LAGUNA project and its present status will be presented. Some aspects of the physics potential of three liquid base (liquid argon, scintillator and water), large scale particle detectors will be also discussed.
Speaker: Prof. Jan Kisiel (Insitute of Physics, University of Silesia, Katowice, Poland)
• 3:15 PM
Measurements of Neutrino-Electron Scattering Cross-Section and the Electroweak Parameters at the Kuo-Sheng Reactor Neutrino Laboratory 15m
The TEXONO Collaboration has been pursuing a research program on low energy neutrino physics[1] at the Kuo Sheng Reactor Neutrino Laboratory in Taiwan, where sensitive searches on neutrino magnetic moments, reactor axions and WIMP dark matter have been performed. We report our final results on the measurement of neutrino-electron scattering cross-section using a CsI(Tl) scintillating crystal array with a total mass of 200 kg [2]. This interaction channel is unique among the Standard Model processes, having both the neutral- and charged-current components, as well as their interference term. The various electroweak parameters were derived. Limits are placed for possible neutrino electromagnetic processes. This measurement provides a probe to the Standard Model at the MeV region, complementary to the precision data at accelerators at higher energies. References : 1. H.T. Wong, Mod. Phys. Lett. A 19, 1207 (2004). 2. H.B. Li et al., Nucl. Instrum. Methods A 459, 93 (2001); Y. Liu et al., Nucl. Instrum. Methods A 482, 125 (2002); Y.F. Zhu et al., Nucl. Instrum. Methods A 557, 490 (2006).
Speaker: Dr Muhammed Deniz (Department of Physics, Middle East Technical University, Turkey; Institute of Physics, Academia Sinica, Taiwan.)
• 3:45 PM
Single pion production induced by neutrino-nucleon interactions 15m
A proper prediction of the cross sections for single pion production in neutrino-nucleon scattering is an important ingredient of the long base-line oscillation experiment analysis (see experiments: K2K, MiniBooNE and T2K). I will present the re-analysis of the single pion production data collected in the 12-ft ANL and 7-ft BNL bubble chamber experiments (neutrino-deuteron scattering data). It has been claimed that the ANL and BNL data are incompatible. In this presentation I will show that ANL and BNL data are consistent. The impact of the deuteron structure effect on the final fits will be also discussed. The new consistent fit of the C5A axial form factor is the main result of our analysis. The fit is applied to the NuWro Monte Carlo (MC) generator and then used to predict $\sigma(CC\pi^+)/\sigma(CCQE)$ ratio for the K2K and MiniBooNE experiments. We compute also the cross sections for the single pi0 production in the neutral current neutrino-nucleon scattering. The neutral current pi0 production is the dominant background to the measurement of the $nu_\mu \to nu_e$ oscillation planned to be observed at the T2K experiment. The resulting cross sections are calculated together with the uncertainties coming from the uncertainties of the original experimental data.
Speaker: Dr Krzysztof Graczyk (Institute of Theoretical Physics, University of Wrocław)
• 4:00 PM
coffee break 30m
• 4:30 PM
Lepton Flavour Violation in Models with A4 Flavour Symmetry. 20m
I discuss lepton flavour violating transitions, leptonic magnetic dipole moments (MDMs) and electric dipole moments (EDMs) in a class of models characterized by the flavour symmetry A4 x Z3 x U(1)_{FN}. I present the relevant low-energy effective Lagrangian where these effects are dominated by dimension six operators, suppressed by the scale M of new physics. All the flavour breaking effects are universally described by the vacuum expectation values <Phi> of a set of spurions. I separately analyze both a supersymmetric and a general case. While the observed discrepancy delta a_mu in the anomalous MDM of the muon suggests M of order of a few TeV, several data require M above 10 TeV, in particular the limit on EDM of the electron. In the general case also the present limit on BR(mu -> e gamma) requires M >10 TeV, at least. The branching ratios for mu -> e gamma, tau -> mu gamma and tau -> e gamma are all expected to be of the same order. In the supersymmetric case the constraint from mu -> e gamma is softened and it can be satisfied by a smaller scale M. In this case both the observed delta a_mu and the current bound on BR(mu -> e gamma) can be satisfied, at the price of a rather small value for |<Phi>|, of the order of a few percents, that reflects on a similar value for theta_{13}.
Speaker: Dr Ferruccio Feruglio (University of Padova)
• 5:10 PM
Minimal flavour seesaw models 20m
We explore realizations of minimal flavour violation (MFV)within the lepton sector. We find that it can be realized within those seesaw models where a separation of the lepton number and lepton fl avour violating scales can be achieved, such as type II and inverse seesaw models. We present in particular a simple possibility that results in a different implementation of the MFV hypothesis than has been discussed before. Corresponding experimentally reachable predictions for rare lepton processes are given.
• 5:30 PM
Constraining nonstandard neutrino-electron interactions 20m
There is currently a strong effort to build models containing the neutrino mass pattern observed in recent experiments. Most of this models implies nonstandard interactions that can be parametrized in terms of effective four-fermion operators in the low-energy limit. In this talk I will show the status of some of the constraints to these parameters obtained from reactor, accelerator, and solar neutrino data. I will also discuss the perspectives of some experimental proposals to improve these bounds. I will concentrate mainly on the nonstandard interaction of the neutrino with electrons.
Speaker: Dr Omar Miranda (Depto de Fisica Cinvestav)
• 5:50 PM
On the Interplay Between the 'Low' and 'High' Energy CP-Violation in Leptogenesis. 20m
We analyse within the "flavoured" leptogenesis scenario of baryon asymmetry generation, the interplay of the "low energy" CP-violation, originating from the PMNS neutrino mixing matrix $U$, and the "high energy" CP-violation which can be present in the matrix of neutrino Yukawa couplings, $\lambda$, and can manifest itself only in "high" energy scale processes. The type I see-saw model with three heavy right-handed Majorana neutrinos having hierarchical spectrum is considered. The "orthogonal" parametrisation of the matrix of neutrino Yukawa couplings, which involves a complex orthogonal matrix $R$, is employed. In this approach the matrix $R$ is the source of "high energy" CP-violation. Results for normal hierarchical (NH) and inverted hierarchical (IH) light neutrino mass spectrum are derived in the case of decoupling of the heaviest RH Majorana neutrino. It is shown that taking into account the contribution to $Y_B$ due to the CP-violating phases in the neutrino mixing matrix $U$ can change drastically the predictions for $Y_B$, obtained assuming only "high energy" CP-violation from the $R$-matrix is operative in leptogenesis. In the case of IH spectrum, in particular, there exist significant regions in the corresponding parameter space where the purely "high energy" contribution in $Y_B$ plays a subdominant role in the production of baryon asymmetry compatible with the observations.
Speaker: Mr Emiliano Molinaro (SISSA)
• 9:00 AM 6:05 PM
II. Flavour Physics Large

### Large

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
• 9:00 AM
Inclusive radiative B meson decays at Belle 15m
Improved measurement of inclusive radiative $B$-meson decays We report a fully inclusive measurement of the flavor changing neutral current decay $B\to X_s\gamma$ in the energy range $1.7\,{\rm GeV}\le E^\mathrm{c.m.s.}_\gamma\le2.8\,{\rm GeV}$, covering 97\% of the total spectrum, where c.m.s. is the center of mass system. Using 605 fb$^{-1}$ of data we obtain measurements of the partial branching fraction and first and second moments of the photon energy spectrum for lower energy thresholds including and above $1.7\,{\rm GeV}$. Improved Measurement of the Electroweak Penguin Process $B \to X_s\ell^+\ell^-$ We present a measurement of the branching fraction for the electroweak penguin process $B \to X_s\ell^+\ell^-$, where $\ell$ is an electron or a muon and $X_s$ is a hadronic system containing an $s$-quark. The $X_s$ hadronic system is reconstructed with one $K^{\pm}$ or $K^{0}_{s}$ and up to four pions, where at most one pion can be neutral. The measurement is based on a data sample four times larger than used in the previous analysis, accumulated at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB $e^+e^-$ asymmetric-energy collider.
Speaker: Bostjan Golob (University of Ljubljana, Jozef Stefan Inst.)
• 9:15 AM
Exclusive leptonic and radiative B meson decays at Belle 15m
Measurement of the Differential Branching Fraction and Forward-Backward Asymmetry for $B \to K^{(*)} \ell^+ \ell^-$ We study $B \to K^{(*)} \ell^+ \ell^-$ decays based on a data sample of 657 million $B\bar{B}$ pairs collected with the Belle detector at the KEKB $e^+ e^-$ collider. We report the differential branching fraction, isospin asymmetry, $K^{*}$ polarization, and the forward-backward asymmetry ($A_{FB}$) as functions of $q^2=M_{\ell\ell}^{2} c^2$. The fitted $A_{FB}$ spectrum tends to be higher than the Standard Model expectation in all $q^2$ bins. The measured branching fractions are $\mathcal{B}$($B \to K^* \ell^+ \ell^-$) = $(10.7^{+1.1}_{-1.0}\pm0.9) \times 10^{-7}$ and $\mathcal{B}$($B \to K \ell^+ \ell^-$) = $(4.8^{+0.5}_{-0.4}\pm0.3) \times 10^{-7}$, with the muon to electron ratios $R_{K^*}$ = 0.83 $\pm 0.17 \pm 0.05$ and $R_{K}$ = 1.03 $\pm 0.19 \pm 0.06$, respectively. Search for purely leptonic decays $B^+ \to l^+ \nu$ The purely leptonic decay $B^+ \to l^+ \nu$ ($l = e, \mu$) is highly suppressed in the Standard Model due to lepton helicity mismatch but can be strongly enhanced in New Physics scenarios. We present a search for the decays $B^+ \to e^+ \nu$ and $B^+ \to \mu^+ \nu$ using a large data sample recorded by the Belle detector at the KEKB energy-asymmetric $e^+ e^-$ collider. Evidence for $B \to K \eta' \gamma$ We report the results of a search for the radiative decay $B \to K \eta' \gamma$and find evidence for $B^+ \to K^+ \eta' \gamma$. The results are obtained from a 605 fb$^{-1}$ data sample collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. Measurements of time-dependent $CP$ violation and branching fractions in radiative $B \to \phi K \gamma$ and $B \to \omega K \gamma$ decays We report measurements of time-dependent $CP$-violation parameters in radiative $B^0 \to \phi K_S^0 \gamma$ and $B^0 \to \omega K_S^0 \gamma$ decays using a large data sample collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB energy-asymmetric $e^+e^-$ collider. These measurements are sensitive to right-handed currents from new physics. We also report updated measurements of branching fractions in $B \to \phi K^{+}(K_S^0) \gamma$ decays and new measurements of $B \to \omega K^{+}(K_S^0) \gamma$ decays.
Speaker: Shohei Nishida (KEK)
• 9:30 AM
New physics sensitivity of the rare decay mode $B \to K^0 \ell^-\ ell^+$ 15m
We design new observables available from the angular distributions of the decay $B \to K^0 ell^- ell^+$ with high sensitivity to specific new phsyics operators. We present a NLO analysis of all observables based on the QCD factorization approach in the low-dilepton mass region and make the uncertaintities due to the $\Lambda/m_b$ corrections manifest and finally analyse the sensitivity of the new observables to new physics. We explore the experimental sensitivities at LHCb and SuperLHCb based on a full-angular fit method. We also show that the previously discussed transversity amplitude $AT_1$ cannot be measured at the LHCb experiment or at future $B$ factory experiments as it requires a measurement of the spin of the final state particles. We also analyse CP violating observables in this decay mode and critically discuss their sensitivity to new physics.
Speaker: Dr Tobias Hurth (CERN)
• 9:45 AM
FCNC Processes in the LHT Model: a 2009 Look 15m
We update our 2006-2007 results for FCNC processes in the Littlest Higgs model with T-parity. The removal of the logarithmic UV cutoff dependence in our previous results through a new contribution to Z0 penguin diagram identified by Goto et al. and Aquila et al., while making the deviations from the SM expectations in the quark sector less spectacular, still allows for sizable new physics effects in K -> pi nu \bar nu and KL -> pi0 l+ l− decays and in the CP asymmetry S_[psi phi] that remains unchanged. While li -> lj decays are essentially unaffected by these modifications, the branching ratios for decays with three leptons in the final state, like mu -> 3e are lowered by almost an order of magnitude. In spite of this, the pattern of lepton flavour violation in the LHT model can be distinguished from the one in the supersymmetric models.
Speaker: Dr Cecilia Tarantino (University Roma Tre)
• 10:00 AM
Search for new physics at LHCb: CP violation in Charm sector and rare decays of B hadrons 15m
Speaker: Dr Marie-Helene Schune (LAL-Orsay IN2P3/CNRS)
• 10:15 AM
D0-D0bar mixing at BABAR 20m
Speaker: Dr Carlos Chavez (University of Liverpool)
• 10:35 AM
coffee break 25m
• 11:00 AM
Recent Results from the KEDR Detector 15m
We present results of precise measurements in the psi family energy range based on the data collected with the KEDR detector at the VEPP-4M e+e- collider in Novosibirsk. They include: final results on the high-precision measurements of the J/psi and psi(2S) masses, leptonic widths of the J/psi meson, D+ and D0 meson masses.
Speaker: Dr Simon Eidelman (Budker Institute of Nuclear Physics, Novosibirsk, KEDR Collaboration)
• 11:15 AM
Charm decays at Belle 15m
Dalitz plot analysis of the decay $D^0 \to \pi^+\pi^-\pi^0$ We report preliminary results of the Dalitz plot analysis of the decay $D^0 \to \pi^+\pi^-\pi^0$ using a 532 fb$^{-1}$ data sample collected with the Belle detector at the KEKB asymmetric-energy $e^+ e^-$ collider. The fit model includes the intermediate vector resonances $\rho(770)$, $\omega$, $\rho(1450)$, and $\rho(1700)$, the scalar states $\sigma(600)$, $f_0(980)$, $f_0(1370)$, and $f_0(1500)$ as well as the tensor state $f_2(1270)$. The asymmetry between the two flavour samples - $D^0$ and $\bar D^0$ - has been also estimated. Search for $D^0$ leptonic decays with Belle We present a search for the rare $D^0$ leptonic decays, $D^0 \to e^+ e^-$, $\mu^+ \mu^-$, and the decays $D^0 \to e^+ \mu^-$ which are forbidden in the Standard Model. Limits on the branching fractions for these decays are obtained using the well measured $D^0 \to \pi^+ \pi^-$ decay channel for normalization. The search is performed using a large sample of $D^0$ decays recorded by the Belle experiment corresponding to an integrated luminosity of 660 fb$^{-1}$. Study of $D^+_{(s)}$ decays to $K_S \pi^+$ and $K_S K^+$ Using 605 fb$^{-1}$ of data collected by the Belle detector at the KEKB asymmetric energy $e^+ e^-$ collider, we study the decays of $D^+_{(s)}$ mesons to $K_S \pi^+$ and $K_S K^+$ final states. We report branching fractions normalized with respect to Cabibbo-favored modes, $\Gamma(D^+ \to K_S K^+)$/$\Gamma(D^+ \to K_S \pi^+)$ and $\Gamma(D^+_s \to K_S \pi^+)$/$\Gamma(D^+_s \to K_S K^+)$. Study of $\eta_c^{(')}$ properties in $B \to \eta_c^{(')}K$ decays Reconstructed $B$ decays to a charged kaon and an $\eta_c$-type charmonium from a data sample of 535 million $B \bar B$ meson pairs collected in the Belle experiment at the KEKB $e^+ e^-$ collider have been used to study properties of the $\eta_c$ and its first excitation, the $\eta_c(2S)$. We use the decay mode $K_S K \pi$ to study the effects of interference between charmonium signal and $B$ decays into the same final state without an intermediate charmonium. Taking this interference into account we obtain masses, widths, and decay branching fractions of the $\eta_c$ and $\eta_c(2S)$ mesons. The results agree with the world average values; for the first time, interference effects are taken into account. Measurement of the inclusive decay $D^0 \to \phi X$ and of exclusive decays of the $D^0$ particle involving a $K^+K^-$ pair Using data collected by the Belle detector at the KEKB storage ring and applying a novel method of completely reconstructing events up to a $D^0$, with a $K^+K^-$ pair "left over", the branching fraction of the inclusive decay of $D^0 \to \phi X$ has been measured with high precision. In addition, the exclusive branching fraction $D^0 \to K^+K^-$ has been determined with good precision. Furthermore various branching fractions of $D^0$ decays involving a $K^+K^-$ pair have been measured for consistency: $D^0 \to (K^+K^-K^0)_{nonres}, \phi K^0, K^+K^-\pi^0, \phi(K^+K^-)\pi^0, and$\phi(K^+K^-)\omega^0$. Results presented in the study are preliminary. Observation of the doubly Cabibbo-suppressed decay$D_s^+ \to K^+ K^+ \pi^-$We report the first observation of the doubly Cabibbo-suppressed decay$D^+_s\to K^+K^+\pi^-$using 605 fb$^{-1}$of data collected with the Belle detector at the KEKB asymmetric-energy$e^+e^-$collider. The branching ratio with respect to its Cabibbo-favored counterpart$\mathcal{B}(D^+_s\to K^+K^+\pi^-)$/$\mathcal{B}(D^+_s\to K^+K^-\pi^+)$is (0.229$\pm0.028\pm$0.012)%, where the first uncertainty is statistical and the second is systematic. We also report a new, more precise measurement of the doubly Cabibbo-suppressed decay$D^+\to K^+\pi^+\pi^-$, with a branching ratio$\mathcal{B}(D^+\to K^+\pi^+\pi^-)$/$\mathcal{B}(D^+\to K^-\pi^+\pi^+)$=(0.569$\pm0.018\pm$0.014)%. Speaker: Eunil Won (Korea University) • 11:30 AM Charm decays at BABAR 15m Speaker: Prof. Richard Kass (Ohio State University) • 11:45 AM Semileptonic decays of D mesons at CLEO 15m please see abstracts 634 and 637. Speaker: Prof. Tomasz Skwarnicki (Syracuse University) • 12:00 PM Quantum-correlated D Decays at CLEO-c 15m The 818 fb-1 dataset collected at the psi(3770) resonance in the CLEO-c detector offers unique possibilities for measuring strong phase differences in neutral D decays. The measurements require that both D mesons in the event are fully reconstructed, usually with one decaying to the signal mode of interest, and the other to a CP eigenstate. The strong phase differences extracted from these decays are important inputs to measurements of D-mixing parameters and the determination of the CKM angle gamma in B --> DK decays. Results will be present from a variety of D decays including KSpipi, KSKK and other 3- and 4-body modes. The impact of these results on the measurement of the CKM angle gamma/phi3 will be discussed. Speaker: Dr Stefania Ricciardi (STFC Rutherford Appleton Laboratory) • 12:15 PM Hadronic decays of D mesons at CLEO 15m Speaker: Prof. David Miller (Purdue University) • 12:30 PM lunch break 2h • 2:30 PM Review of NA48 CP violation measurements with neutral and charged kaons 15m The NA48 experiment at the SPS was designed in the early nineties to solve the issue of the existence of direct CP violation, and to measure it with high precision. The developement of an intense beam, an ensemble of detectors providing state-of-the art resolution, and a performant data acquisition system, allowed to perform several other CP violation measurements to be performed. After the completion of the above program, the switch to a unique configuration with twin charged kaon beams allowed accurate searches for further CP violation effects, exploiting unprecedented statistics and systematic control thanks to a highly CP-symmetric design. The CP violation measurements obtained from almost a decade of data collection will be reviewed. Speaker: Dr Patrizia CENCI (Istituto Nazionale di Fisica Nucleare, Sezione di Perugia) • 2:45 PM Precision measurements of rare kaon decays 15m We report the latest results on rare kaon decays from NA48/2 experiment. Samples of 7200 reconstructed K+- -> pi+- e+ e-, and more than 3000 K+- -> pi+- mu+ mu- events, with very small background contamination, have been collected. The latter is exceeding the total existing statistics by a factor of five. A precise measurement of the branching fractions and the form factors of the rare decays K+- -> pi+- l+ l- has been performed using different theoretical models. The precise measurement of direct photon emission (DE) in the decay K+- -> pi+- pi0 gamma and its interference (INT), with the INT amplitude being observed for the first time, has been finalized. This study is based on the full NA48/2 data set with about 600k reconstructed K+- -> pi+- pi0 gamma decays which is factor of 30 larger than for previous experiments. We report the results on the CP violating asymmetry between K+ and K- obtained from rare kaon decays. Speaker: Mrs Evelina Marinova (INFN Sezione di Perugia) • 3:00 PM K and B Physics in a Warped Extra Dimension with Custodial Protection 15m I briefly introduce the theoretical basics of a warped extra dimension with custodial protection, paying particular attention to the flavour structure of this type of models. Then I discuss the implications for particle-antiparticle mixing that is affected by tree level exchanges of KK gauge boson in an important manner. I show that although generically the experimental constraint from epsilon_K requires a KK scale of at least 20 TeV, even with KK modes in the reach of the LHC this constraint can be fulfilled without significant fine-tuning of the fundamental 5D Yukawa couplings. Simultaneously the CP-asymmetries S_{psi phi} and A^s_SL, related to B_s mixing, can be significantly enhanced over their SM predictions. After that I turn to the predictions for rare K and B decays in that scenario, that turn out to be dominantly affected by tree level flavour changing Z couplings to right-handed down-type quarks. It turns out then that while rare K decays can receive large corrections with respect to their SM predictions, the effects in B decays are small and challenging for future experiments. Interesting correlations between various observables occur, that allow in principle to distinguish this models from other new physics scenarios, such as models with Minimal Flavour Violation or the Littlest Higgs model with T-parity. Speaker: Ms Monika Blanke (Technische Universitaet Muenchen) • 3:15 PM KLOE measurements of KL lifetime and absolute branching ratio of K+ -> pi+pi-pi+ 15m We are presently finalizing a new determination of the KL lifetime using the whole KLOE data set, consisting of more than 10^9 phi -> KSKL decays (the previous KLOE measurement is reported in PLB 626, 2005). The KL lifetime will be extracted from the proper time distribution of KL -> 3pi0 decays, tagged by KS -> pi+pi- decays on the opposite hemisphere of the apparatus. The measurement of the BR for the decay K+ -> 3 charged pions completes the KLOE program of precise and fully inclusive measurements of the kaon dominant BR's. We are currently finalizing this measurement, which is based on the analysis of phi -> K+K- events in which one of the two kaons undergoes a two-body decay, either mu nu or pi pi0 (tagging kaon). Given a tag, the opposite charged kaon decaying to 3 charged pions is easily and unambiguously identified. Speaker: Patrizia de Simone (LNF - INFN) • 3:30 PM Measurement of the KS lifetimes and CPT symmetry tests in the neutral kaon system with quantum interferometry at KLOE 15m A phi-factory offers the possibility to select pure kaon beams: neutral kaons from phi → KSKL are in fact produced in a well defined state (JPC=1--) and the detection of a kaon at large (small) times tags a KS (KL). This allow to perform precise measurement of kaon properties, as for example lifetime, and to study time evolution of neutral kaon system. In particular, studying the distribution of ∆t, the difference between the two neutral kaon decay times, where both kaons decay into π+π− pair, provides unique opportunities for testing quantum mechanics and CPT symmetry. Using the full 2004-2005 data sample (L=1.5 fb-1) collected with the KLOE detector at the Frascati-DAΦNE e+e− collider, we discuss very recent update of the results testing the validity of quantum mechanics and CPT invariance. Then, we are presently finalizing the determination KS lifetimes using ~1/3 the whole KLOE data set, where the proper time distribution of KS → π+π− provides a competitive measurement of lifetime. Speaker: Dr Marco Dreucci (Istituto Nazionale di Fisica Nucleare) • 3:45 PM Vus and lepton universality from kaon decays at KLOE 15m KLOE has measured most decay branching ratios of K_S, K_L amd K^+- mesons. It has also measured the K_L and the K^+- lifetime and determined the shape of the form factors involved in kaon semileptonic decays. We present a description of the above measurements and a well organized compendium of all of our data, with particular attention to correlations. These data provide the basis for the determination of the CKM parameter V_us and a test of the unitary of the quark flavor mixing matrix. We also test the lepton universality in Kl3 decays and place bounds on new physics using measurements of V_us from Kl2 and Kl3 decays. All of the above measurements, together with the results on KS, KL and K+- decays published during 2006 and 2007 have recently combined in JHEP 04 (2008) 059, to obtain the KLOE determination of Vus. A measurement of the ratio R_K=Gamma(Ke2)/Gamma(Kmu2) with 1.3% accuracy has also been performed. The result is based on 2.2 fb-1 of data collected at the Frascati e+e- collider DAFNE. Recently, it has been pointed out that in a supersymmetric framework, lepton flavor changing processes mediated by the charged Higgs could occur, in particular in the kaon decay to an electron and tau neutrino. In this scenario, deviations of up to few percent on R_K from SM expectation are quite possible. The measurement will be described, and its theoretical implications will be discussed. Speaker: Dr Erika De Lucia (Laboratori Nazionali di Frascati - INFN) • 4:00 PM coffee break 30m • 4:30 PM Exclusive semileptonic b -> c decays at Belle 20m Measurement of the decay$B^0 \to D^{*-} l^+ \nu$We present measurements of the branching fraction and of the HQET form factors$\rho^2$,$R_1$and$R_2$for the decay$B^0 \to D^{*-} l^+ \nu$using untagged$\Upsilon(4S) \to B \bar B$events. The Cabibbo-Kobayashi-Maskawa matrix element$|V_{cb}|$is extracted and a test of the form factor parametrization is presented. The results are based on a large data sample recorded by the Belle detector at the KEKB$e^+ e^-$collider. Measurement of the decay$B^+ \to \bar{D}^{*0} l^+ \nu$The measurement of the decay$B^+ \to \bar{D}^{*0} l^+ \nu$does not rely on charged slow pion reconstruction and thus allows us to cross-check measurements of$B^0 \to D^{*-} l^+ \nu$. We present measurements of the branching fraction and of the HQET form factors$\rho^2$,$R_1$and$R_2$using$\Upsilon(4S) \to B \bar B$events. The Cabibbo-Kobayashi-Maskawa matrix element$|V_{cb}|$is extracted. The results are based on a data sample recorded by the Belle detector at the KEKB$e^+ e^-$collider. Measurement of$B \to D^{(*)} \tau \nu$using hadronic tag We present a measurement of$B \to D^* \tau \nu$and$B \to D \tau \nu$decays using a large data sample collected near the$\Upsilon(4S)$resonance with the Belle detector at the KEKB asymmetric energy$e^+ e^-$collider. Events are tagged by fully reconstructing one of the$B$mesons in hadronic modes. Constraints on theoretical models with a charged Higgs boson are discussed. Studies of$B^+ \to \bar{D}^{(*)0} \tau^+ \nu$with inclusive reconstruction of the accompanying$B$meson We present studies of$B^+ \to \bar{D}^{*0} \tau^+ \nu$and$B^+ \to \bar{D}^0 \tau^+ \nu$decays using a large data sample collected with the Belle detector at the KEKB asymmetric-energy$e^+ e^-$collider. The events are tagged by inclusively reconstructing the accompanying$B$meson. Measurements of branching fractions and distributions characterizing signal decays are presented. Speaker: Wolfgang Dungel (Institute for high energy physics, Austrian academy of Sciences) • 4:50 PM Exclusive Semileptonic b -> c decays at BABAR and the determination of Vcb 15m Speaker: Dr Marcello Rotondo (INFN Padova) • 5:05 PM Inclusive b -> u decays and determination of Vub at BELLE 15m Speaker: Isamu Nakamura (KEK) • 5:20 PM Inclusive Semileptonic B Decays at BABAR 15m presenter will be chousen Speaker: Dr Jan Erik Sundermann (U Freiburg) • 5:35 PM Quark masses from low-energy moments of heavy-quark current correlators 15m We present new results for the low-energy moments of heavy-quark current correlators. These new results can be used to improve the determination of the charm- and bottom-quark masses from experimental data of R(s) or in case of the charm quark from comparison with lattice calculations. For the bottom quark we discuss the impact of new data from the Babar experiment. Speaker: Dr Peter Marquard (Institute for Theoretical Particle Physics, Karlsruhe, Germany) • 5:50 PM Branching fractions and charge asymmetries in charmless hadronic B decays at BABAR 15m Speaker: Mr Pietro Biassoni (Universita' degli Studi and INFN Milano) • 9:00 AM 6:00 PM III. Higgs and New Physics Large Lecture - Hall B ### Large Lecture - Hall B #### Kraków, Poland The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków • 9:00 AM Searches for chargino/neutralino production at the Tevatron 20m The production of chargino-neutralino pairs and their subsequent leptonic decays is one of the most promising supersymmetry (SUSY) signatures at the Tevatron proton- antiproton collider. We present here the most recent results on the search for the three-lepton and missing-transverse-energy SUSY signature using data collected with the CDF and D0 detectors. At CDF, chargino-neutralino pairs are also searched for using events with a Z (to e+e-), two or more jets from a W decay, and large missing transverse energy. The presented results, based on data corresponding to 2.7/fb of integrated luminosity, are interpreted in the minimal supergravity scenario. Speakers: Dr Jared Yamaoka (University of Duke), Dr Jared Yamaoka (Duke University) • 9:20 AM Early new physics searches with leptons at LHC 20m Several models predict the existence of new particles leading to final states with high pT leptons. New heavy resonances may decay to dilepton or lepton with missing ET. Leptoquarks and Left-Right symmetric models lead to final states with leptons and jets. Models with substructure predict excited states of quarks and leptons leading to final states with lepton plus photon. The prospect for early discoveries, with integrated luminosity of about 100 pb-1, using ATLAS and CMS detectors, are discussed. Speaker: Dr Claudio Gatti (Laboratori Nazionali di Frascati - INFN) • 9:40 AM Early new physics searches with jets at the LHC 20m Many proposed models of new physics predict yet undiscovered particles which decay with high branching fractions into quarks, such as extra gauge boson or fourth generation quarks. The high branching fractions to quarks make searches in channels with jets in the final state attractive for investigations at low integrated luminosities or new phenomena with low production cross sections. The most challenging aspect of such analysis is the large background expected from standard model QCD processes. The prospects of new discoveries in final states with jets at the Atlas and CMS experiment at the LHC will be presented. Speaker: Dr Matthias Mozer (Vrije Universiteit Brussel) • 10:00 AM Phenomenology of the minimal B-L extension of the Standard model 15m We present the Large Hadron Collider (LHC) discovery potential in the$Z'$and heavy neutrino sectors of a$U(1)_{B-L}$enlarged Standard Model also encompassing three heavy Majorana neutrinos. This model exhibits novel signatures at the LHC, the most interesting arising from a$Z'$decay chain involving heavy neutrinos, eventually decaying into leptons and jets. In particular, this signature allows one to measure the$Z'$and heavy neutrino masses involved. In addition, over a large region of parameter space, the heavy neutrinos are rather long-lived particles producing distinctive displaced vertices that can be seen in the detectors. Lastly, the simultaneous measurement of both the heavy neutrino mass and decay length enables an estimate of the absolute mass of the parent light neutrino. For completeness, we will also compare the LHC and future LCs discovery potentials. Speaker: Mr Lorenzo Basso (PhD student) • 10:15 AM Search for BSM physics (non-SUSY) in final states with photons at the Tevatron 15m We present the latest Tevatron results in searches for rare and exotic processes requiring photons in the final state. The presentation will include high-Pt searches in the final states with one or two photons plus other high-Pt objects including leptons and missing transverse energy. New limits from a search for a Fermiobphobic Higgs in the diphoton final state are also presented. Speaker: Dr Enrique Palencia (FNAL) • 10:30 AM coffee break 30m • 11:00 AM High-mass resonances in dilepton, dijet and diboson final states at the Tevatron 20m At hadron colliders, new massive particles can be searched for by the observation of high tranverse momentum objects forming high-mass resonances. Searches for additional massive vector bosons (W',Z'), Randall-Sundrum gravitons and sneutrinos in R-parity violating scenarios are performed in dilepton, dijets and diboson final states. The most recent results from the CDF and D0 experiments at the Tevatron are presented. Speaker: Dr Michel Jaffre (Laboratoire de l Accelerateur Lineaire, Orsay, France) • 11:20 AM Extra dimensions and micro black holes at the LHC 15m Models with extra dimensions have been proposed to solve outstanding problems of the Standard Model. In some of those models the strength of gravity is increased at TeV energies and unified with the electroweak interaction. New studies are presented on the sensitivity to searches for new gauge bosons, such as W' and Z' bosons and other high mass resonances, as predicted e.g. by Randall-Sundrum models; to searches for large (ADD) extra dimensions in channels with missing transverse energy; to searches with di-photon final states; to searches for universal extra dimensions, and to searches for micro black hole production at the LHC. Speaker: Dr Viatcheslav Valuev (UCLA) • 11:35 AM Challenges for long-lived massive particle searches at the LHC 15m Studies of the CMS and ATLAS collaborations are presented on the sensitivity to searches for long-lived massive particles. Such particles appear for example in particular SUSY, Extra Dimensions and Hidden Valley models. We show the challenges to trigger and reconstruction posed by such particles, and how CMS and ATLAS plan to solve them. Particular emphasis is given to possible early discoveries, ie with 100 pb-1 or less. In special cases, long-lived particles may come to rest in dense material, and decay at much later times; these can be searched for by triggering during periods with no beam-beam collisions. Speaker: Dr Andrea Giammanco (Louvain) • 11:50 AM Study of multi-muon events produced in ppbar collisions with CDF 20m We report a study of multi-muon events produced at the Fermilab Tevatron collider and recorded by the CDF II detector. In a data set acquired with a dedicated dimuon trigger and corresponding to an integrated luminosity of 2100pb-1, we isolate a significant sample of events in which at least one of the muon candidates is produced outside of the beam pipe of radius of 1.5 cm. The production cross section and kinematics of events in which both muon candidates are produced inside the beam pipe are successfully modeled by known QCD processes which include heavy flavor production. In contrast, we are presently unable to fully account for the number and properties of the remaining events, in which at least one muon candidate is produced outside of the beam pipe, in the terms of the same understanding of the CDF II detector, trigger, and event reconstruction. Several topological and kinematic properties of these events are presented. The events offer a plausible resolution to long-standing inconsistencies related to b-bbar production and decay. Speaker: Mr fabio happacher (INFN - LNF) • 12:10 PM Search for Excess Dimuon Production in the Radial Region 1.6<r<10 cm at the D0 Experiment 20m We report on a study of events containing at least two muons produced in ppbar collisions at sqrt{s}=1.96 TeV, performed at the D0 experiment using data corresponding to 0.9 fb-1 of integrated luminosity collected during 2008. Motivated by a recent claim of an excess in muons produced at large radius by the CDF collaboration, we study muons that appear to be produced with a radius between 1.6 and 10 cm from the initial pbbar collision point. The experimenta signature is a well reconstructed muon that is missing hits in the innermost layer of the tracking detector. We record 28374 muons that appear to be produced without hits in the first layer of the tracking detector. Based on the measured hit efficiency, we epect 27 662 pm 503 pm 1027 muons from the primary interaction to not have a reconstructed hit in this layer. This gives an observed excess of 712 pm 462 pm 942 events in which one or both muons are produced in the range 1.6 < r < 10 cm, which is expressed as a fraction (0.40 pm 0.26 pm0.53)\% of the total dimuon sample. A small level of excess is expected due to cosmic rays, decays-in-flight of pions and kaons, and hadronic punchthrough, and first estimates of these contributions are made. We therefore see no anomalously large excess of muons produced a few centimeters away from the interaction point. Speaker: Dr Mark Williams (Lancaster University / Fermilab) • 12:30 PM lunch break 2h • 2:30 PM The Constrained E6SSM 20m I will discuss the predictions of a constrained version of the exceptional supersymmetric standard model (cE6SSM), with a universal high energy soft scalar mass, soft trilinear coupling and soft gaugino mass. The spectrum includes a light gluino, a light wino-like neutralino and chargino pair and a light bino-like neutralino, with other sparticle masses except the lighter stop being much heavier. I will also discuss scenarios with an extra light exotic colour triplet of fermions and scalars and a TeV scale Z', which lead to early exotic physics signals at the LHC. Speaker: Dr David Miller (University of Glasgow) • 2:50 PM Dark Matter from Lorentz Invariance and the LHC 20m We discuss the unique 6 dimensional geometry where a stable Dark Matter candidate arises without imposing any extra discrete symmetry. The KK parity is part of the residual Lorentz symmetry of the compact space due to the absence of fixed points. We will discuss the spectrum of the Standard Model on this 6D background and identify the candidate as a massive scalar photon. Finally, we will briefly sketch the phenomenology of this scenario, focusing on the peculiarities with respect to other models and possible extensions. Speaker: Giacomo Cacciapaglia (IPN Lyon) • 3:10 PM Exploring Non-Supersymmetric New Physics in Polarized Moeller Scattering 20m We study in an effective operator approach how the effects of new physics from various scenarios that contain an extra$Z'$neutral gauge boson or doubly charged scalars, can affect and thus be tested by the precision polarized M\o{}ller scattering experiments. We give Wilson coefficients for various classes of generic models, and we deduce constraints on the parameter space of the relevant coupling constants or mixing angles from the results of the SLAC E158 experiment where applicable. We give also constraints projected from the upcoming 1 ppb JLAB experiment. In the scenario where the extra$Z'$is light ($M_{Z'} \ll M_W$), we obtain further constraints on the parameter space using the BNL$g-2$result where it is useful. We find that the BNL deviation from the Standard Model cannot be attributed to a light extra$Z'$neutral gauge boson. Speaker: Dr Jackson Wu (Institute of Theoretical Physics, University of Bern) • 3:30 PM Dynamical electroweak symmetry breaking by quasiconformal technicolour theories 15m In technicolour theories the electroweak symmetry is broken by chiral symmetry breaking in an additional strongly interacting sector added to the standard model without elementary Higgs sector. Quasiconformal technicolour models with matter in higher representations of the technicolour gauge group are viable candidates for breaking the electroweak symmetry dynamically. They are not at odds with available electroweak precision data. Here, we start with a brief introduction into dynamical electroweak symmetry breaking by technicolour theories. Subsequently, we discuss the phase diagram of strongly interacting theories in the Nc-Nf-plane and how to relate it to the task of finding candidates for quasiconformal technicolour models. Continuing from there, we select the prime candidates by using constraints from available electroweak precision data like, for example, bounds on flavour changing neutral currents, oblique parameters and the detectability of Nambu--Goldstone modes. The latter issue is also linked to the stability of the vacuum. We discuss the features of selected candidates in greater detail. Speaker: Dr Dennis D. Dietrich (University of Southern Denmark) • 3:45 PM Evolution of the Universe to the present Inert phase 15m We study 2HDM with an Z2 symmetry conserved both at the Lagrangian level and in states, assuming Model I for the Yukawa interaction. Such model can offer a candidate for a dark matter. We consider possible evolution of Universe after EWSB phase transition to the present Inert phase. Speaker: Prof. Maria Krawczyk (University of Warsaw) • 4:00 PM coffee break 30m • 4:30 PM Constraints of new physics theories using Gfitter 15m Physics beyond the Standard Model (SM) can change the prediction of the electroweak precision observables. Such effects can be parametrised in terms of effective, so-called {\it oblique} parameters. A global fit of the electroweak SM, as recently performed with the Gfitter package, allows one to determine the oblique parameters and to derive constraints on new physics. In this talk, the Gfitter results for the oblique parameters are presented together with constraints on various new physics models. In addition, we report independent fit results for a model with an extended Higgs sector (2HDM) using mainly observables from the B and K physics sectors and results from fits including Supersymmetric scenarios. Speaker: Dr Max Baak (CERN) • 4:45 PM The Probable Fate of the Standard Model 15m Extrapolating the Standard Model to high scales using the renormalisation group, three possibilities arise, depending on the mass of the Higgs boson: if the Higgs mass is large enough the Higgs self-coupling may blow up, entailing some new non-perturbative dynamics; if the Higgs mass is small the effective potential of the Standard Model may reveal an instability; or the Standard Model may survive all the way to the Planck scale for an intermediate range of Higgs masses. We evaluate the relative likelihoods of these three possibilities, on the basis of a global fit to the Standard Model made using the Gfitter package. This uses the information about the Higgs mass available directly from Higgs searches at LEP and now the Tevatron, and indirectly from precision electroweak data. We find that the blow-up' scenario is disfavoured at the 99\% confidence level (96\% without the Tevatron exclusion), whereas the metastable' and `survival' scenarios both remain quite plausible. A future measurement of the mass of the Higgs boson could determine the fate of the Standard Model. Speaker: Prof. Jose Ramon Espinosa (IFAE, Barcelona) • 5:00 PM Extracting SUSY parameters from LHC measurements using Fittino 15m With the advent of the LHC, low-energy Supersymmetry can be probed over the largest part of the theoretically motivated parameter space. Based on detailed experimental studies by the ATLAS and CMS collaborations, we investigate to what extent the parameters of the MSSM as well as of constrained models such as mSugra and GMSB can be measured as a function of the integrated luminosity ranging from 1 fb^-1 to 300 fb^-1. Special emphasis is given to a careful evaluation of the stability of a global chi^2 parameter estimation technique encoded in the Fittino package. This technique is based the simulated annealing algorithm for global function minimization with error determination from repeated Monte Carlo experiments ("toy fits"). The method is augmented by an efficient scan of the chi^2 hyper-surface in the multi-dimensional parameter space using a Markov-chain Monte Carlo approach. Furthermore, we investigate the impact of additional constraints on the parameter space from low-energy measurements such as b -> s gamma and (g-2)_\mu and cosmological constraints on the dark matter density in the Universe. Their impact is evaluated using the MasterCode and MircoMegas packages. Finally, the improvement possible with a future linear collider is also investigated. Speaker: Klaus Desch (University of Bonn) • 5:15 PM General Search for New Phenomena at HERA 15m A model--independent search for deviations from the Standard Model prediction is performed using the full$e^\pm p$data sample collected by the H1 experiment at HERA. All event topologies involving isolated electrons, photons, muons, neutrinos and jets with transverse momenta above 20 GeV are investigated in a single analysis. Events are assigned to exclusive classes according to their final state. A dedicated algorithm is used to search for deviations from the Standard Model in the distributions of the scalar sum of transverse momenta or the invariant mass of final state particles and to quantify their significance. Variables related to angular distributions and energy sharing between final state particles are also introduced to study the final state topologies. No significant deviation from the Standard Model expectation is observed in the phase space covered by this analysis. Speaker: Dr Gerhard Brandt (DESY) • 5:30 PM Global searches at the Tevatron 15m Model-independent global searches for new physics have been performed at the CDF and D0 experiments. Using 2 fb-1 of data, at CDF nearly 400 final states are examined, looking for discrepancies between the observed data and the standard model expectation in populations, kinematic shapes, and the tails of the summed transverse momentum distribution. A significant improvement to the sensitivity is achieved searching also in approximately 5000 mass variables looking for 'bumps' that might indicate resonant production of new particles. At D0, global and model-independent searches are performed in final states involving leptons using 1 fb-1 of data. Speaker: Dr Peter Renkel (Southern Methodist University) • 5:45 PM Generic Search for Deviations from Standard Model Predictions in CMS 15m We present a model independent analysis approach, systematically scanning the data for deviations from the Standard Model Monte Carlo expectation. Such an analysis can contribute to the understanding of the CMS detector and the tuning of event generators. Furthermore, this approach is sensitive to a variety of models of new physics, including those not yet thought of. Events are classified into event classes according to their particle content (muons, electrons, photons, jets and missing transverse energy). A scan of various distributions is performed, identifying significant deviations from the Monte Carlo simulation. Systematic uncertainties are taken into account rigorously within the algorithm. Possible detector effects and generator issues, as well as models involving supersymmetry and new heavy gauge bosons have been used to test the search algorithm. Speaker: Shahram Rahatlou (Sapienza University of Rome &amp; INFN) • 9:00 AM 11:00 AM IV. Heavy Ions Small Hall ### Small Hall #### Kraków, Poland The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków • 9:00 AM Full jet reconstruction in 200 GeV p+p, d+Au and Au+Au collisions by STAR 20m Full jet reconstruction in heavy-ion collisions is a promising tool for the quantitative study of properties of the dense medium produced at RHIC. Measurements of d+Au collisions are important to disentangle initial state nuclear effects from medium-induced$k_\mathrm{T}$broadening and jet quenching. Study of jet production and properties in d+Au in combination with similar studies in p+p is an important baseline measurement needed to better understand heavy-ion results~[1,2]. The large acceptance of the Time Projection Chamber (TPC) and the Barrel Electromagnetic Calorimeter (BEMC) detectors makes the STAR experiment well suited for full jet reconstruction. Utilizing the high luminosity delivered by RHIC in run 8, a large data sample of 200 GeV d+Au collisions was collected. In addition to the minimally biased trigger, several fast online BEMC triggers were used to enrich the rate of recorded jets. We report measurements of the inclusive jet spectrum and di-jet correlations in d+Au that are sensitive to initial state nuclear effects and compare to similar measurements in p+p collisions. To control detector and trigger related systematic uncertainties we use p+p reference data taken with the same BEMC triggers and the same detector geometry (run 8). In order to estimate the systematic uncertainties in jet reconstruction we apply several modern jet reconstruction algorithms~[3,4]. [1] S.~Salur (for the STAR Collaboration), arXiv:0809.1609. [2] J.~Putschke (for the STAR Collaboration), arXiv:0809.1419. [3] M.~Cacciari and G.~Salam, Phys.\ Lett.\ {\bf B641}, (2006) 57-61. [4] M.~Cacciari, G.~Salam and G.~Soyez, JHEP {\bf 0804}, (2008) 063. Speaker: Mr Jan Kapitan (Nuclear Physics Institute, Academy of Sciences of the Czech Republic) • 9:20 AM First measurements with the ALICE detector at LHC 20m The ALICE experiment is designed to measure the properties of strongly interacting matter created in heavy-ion collisions at LHC. The apparatus has several features, such as low p$_T$acceptance and powerful tracking over a broad momentum range, that make ALICE also an important contributor to the first proton-proton physics. In this respect the ALICE physics program aims both at setting the baseline for the understanding of the heavy-ion data and exploring the new energy domain. \\ The charged-particle multiplicity and pseudorapidity density distributions will be the first measurements that ALICE will perform, both in p-p and in Pb-Pb collisions. As those observables correspond to basic properties of the collisions in the new energy domain at LHC, their knowledge will allow to constrain the hadroproduction models and correctly configure the Monte Carlo generators. Moreover, the measurement of the charged-particle pseudorapidity density in the central rapidity region will extend the existing energy dependence pattern and provide an estimate of the energy density attained in the early phase of the collision. Besides these very first measurements, p$_Tspectra of both all charged and identified particles, baryon number transport and strangeness production analyses will also be carried out within the p-p first physics programme. \\ Since it will follow the first p-p run, the early heavy-ion data taking is expected to be carried out with a fully commissioned detector: in particular alignment and calibrations will be available from the previously collected cosmics and p-p samples. Data quality and statistics should allow, already with this pilot run, to explore quite a rich physics spectrum. The first few 10^4$events (both minimum bias and central collisions) will provide information about global event properties such us multiplicity, pseudorapidity density and elliptical flow. With a statistics of 10$^5$to 10$^6$events particle spectra, resonances, differential flow and interferometry analyses will be accessible. \\ After an introductory description of the status of the experiment, this contribution deals with the ALICE physics potential in particular discussing the early p-p and Pb-Pb running scenarios and the corresponding physics programmes. Details on the very first measurements of the charged-particle pseudorapidity distributions will be also presented. Speaker: Dr Domenico ELIA (INFN Bari) • 9:40 AM Heavy Ion Physics with the ATLAS Detector at the LHC 20m The heavy-ion program at LHC will be pursued by three experiments including ATLAS, a multipurpose detector to study p+p collisions. A report on the potential of the ATLAS detector to uncover new physics in Pb+Pb collisions at energies thirty times larger than energy available at RHIC will be presented. Key aspects of the heavy-ion program of the ATLAS experiment, implied by measurements at RHIC, will be discussed. They include measurement capability of high-pT hadronic and electromagnetic probes, quarkonia as well as elliptic flow and other bulk phenomena. Measurements by the ATLAS experiment will provide crucial information about the formation of a quark-gluon plasma at the new energy scale accessible at the LHC. Speaker: Dr Adam Trzupek (Institute of Nuclear Physics PAN) • 10:00 AM CMS Experiment at LHC: Detector Status and Physics Capabilities in Heavy Ion Collisions 20m The Large Hadron Collider at CERN will collide protons at$\sqrt{S}=14$TeV and lead ions at$\sqrt{S_{NN}}=5.5$TeV. The physics program of the Compact Muon Solenoid (CMS) includes the study of heavy ion collisions. The high energies available at the LHC will allow high statistics studies of the dense partonic system with hard probes: heavy quarks and quarkonia with an emphasis on the$b$and$\Upsilon$, high$p_T$jets, photons, as well as$Z^0$bosons. The CMS detector consists of a 13~m long, 6~m wide superconducting solenoid providing a uniform 4~T magnetic field. Charged particles will be measured with a large acceptance, high resolution silicon tracker consisting of pixel and strip detector layers. The tracker is surrounded by electromagnetic and hadronic calorimeters located inside the magnet while the muon detector is outside. The central detector will be complemented by CASTOR and a ZDC. The tracking system and the muon detector provide hermetic coverage for particles with$|\eta|\leq 2.4$. The high granularity, high resolution calorimeters will provide hermetic coverage for$|\eta|\leq7$. The CMS data acquisition system, with its reliance on a multipurpose, high-level trigger system, is uniquely qualified for efficient triggering in high-multiplicity heavy ion events. The CMS detectors will allow a wide range of unique measurements in nuclear collisions. The excellent calorimeters combined with tracking will allow detailed studies of jets, particularly medium effects on the jet fragmentation function and the energy and$p_T$redistribution of particles within the jet. The large CMS acceptance will allow detailed studies of jet structure in rare jet$-\gamma$and jet$-Z^0$events. The high resolution tracker will tag$b$quark jets. The muon chambers combined with tracking will study production of the$Z^0$,$J/\psi$and the$\Upsilon$family in the central rapidity region of the collision. In addition to the detailed studies of hard probes, CMS will measure charged multiplicity, energy flow and azimuthal asymmetry event-by-event. We will present the latest status of CMS preparations for LHC startup as well as the detailed studies of the CMS capabilities using the full detector simulation and reconstruction. Speaker: Dr Ivan Amos Cali (M.I.T.) • 10:20 AM Saturation effects at forward rapidities at LHC 15m We investigate direct photons and hadrons production at the energies of RHIC and LHC, at different rapidities employing various color-dipole models. The direct photon cross-section peaks at very forward rapidities due to the abelian dynamics of photon radiation. This opens new opportunities for measurement of direct photons at forward rapidities, where the background from radiative hadronic decays is strongly suppressed. Our model calculations show that photon and hadron production are sensitive to the gluon saturation effects, and strongly depends on the value of the anomalous dimension. We discuss implication of various saturation models for the upcoming LHC data. Speaker: Dr Amir Rezaeian (Santa Maria Universidad/Universitaet Regensburg) • 10:35 AM coffee break 25m • 9:00 AM 6:00 PM V. QCD at Colliders Exhibition room A ### Exhibition room A #### Kraków, Poland The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków • 9:00 AM Charmed Meson Production Deep Inelastic Scattering at HERA and Extraction of F2(ccbar) 20m Inclusive production of D* mesons in deep inelastic scattering at HERA is studied. The data were taken with the H1 detector in the years 2004 to 2007 and correspond to an integrated luminosity of ~350 pb^-1. D* mesons are reconstructed in their decays D* -> D0 + pi_slow -> K + pi + pi_slow. The visible range for the measurements covers the pseudorapidity interval |eta(D*)| <1.5, transverse momenta pT(D*)>1.5 GeV, and inelasticity in the scattering process 0.02 < y < 0.7. The cross sections are measured for low photon virtualities, 5<Q^2<100 GeV, and, for the first time with the H1 experiment, for high photon virtualities Q^2 > 100 GeV^2. Single and double differential cross sections are measured and compared to predictions from the next-to-leading order calculation HVQDIS and the leading order Monte Carlo programs RAPGAP and CASCADE. The charm contribution to the proton structure, F2(ccbar), is determined for the kinematic region 7 GeV^2 < Q^2 < 440 GeV^2 and 10^-4 < x_bj < 3 * 10^-2 by extrapolating the visible D* meson cross section measured by the H1 collaboration to the full phase space using the NLO QCD calculation HVQDIS, based on DGLAP evolution, and CASCADE, a LO Monte-Carlo program including parton showers based on CCFM evolution. The production of D+/- and D0 mesons has been measured with the ZEUS detector at HERA using an integrated luminosity of 133.6 pb^-1. The measurements cover the kinematic range 5 < Q2 < 1000 GeV2, 0.02 < y < 0.7, 1.5 < pT(D) < 15 GeV and |eta(D)|<1.6. Combinatorial background to the D meson signals is reduced by using the ZEUS microvertex detector to reconstruct displaced secondary vertices. Production cross sections are compared with the predictions of next-to-leading-order QCD which is found to describe the data well. Measurements are extrapolated to the full kinematic phase space in order to obtain the open-charm contribution, F2(ccbar), to the proton structure function, F2. Speaker: Karin Daum (Wuppertal University) • 9:20 AM Measurement of charm and beauty in DIS using the H1 Vertex Detector and Combination of F_2{cc} 20m The inclusive charm and beauty cross sections as well as the charm and beauty jet cross sections are measured in$e^-p$and$e^+p$collisions at HERA II in deep inelastic scattering. The data were collected with the H1 detector in 2006 and 2007 corresponding to an integrated luminosity of 189 pb^-1. The amount of charm and beauty events is determined using variables reconstructed by the H1 vertex detector including the impact parameter of tracks to the primary vertex and the position of the secondary vertex. The measurements are compared with QCD predictions. A combination of recent results from HERA on the charm contribution, F_2^{cc}, to the inclusive proton structure function F_2 is presented. The charm quarks are identified by reconstructed D mesons, by muons from semi-leptonic charm decays, or by the long lifetime and large mass of charmed hadrons. The combination procedure accounts for correlations of the experimental systematic uncertainties of the measurements as well as theory uncertainties which leads to an improved precision. Speaker: Katerina Lipka (DESY) • 9:40 AM Heavy flavours in DIS using muon tags at HERA 15m The production of charm and beauty quarks in ep interactions has been measured with the ZEUS detector at HERA for squared four-momentum exchange Q^2>20 GeV^2, using an integrated luminosity of 126 pb^-1. Charm and beauty quarks were identified through their decays into muons. Differential cross sections were measured for muon transverse momenta p_T^{mu}>1.5 GeV and pseudorapidities -1.6 Speakers: Massimo Corradi (Bologna University and INFN), Dr massimo corradi (INFN Bologna) • 9:55 AM Heavy Flavour photoproduction at HERA 25m Charm and beauty photoproduction has been studied in ep collisions at HERA with the ZEUS and H1 detectors. Heavy quarks were identified using different experimental techniques. Charm was identified via the reconstruction of D* mesons, while beauty was tagged via its semi-leptonic decay into leptons or using lifetime tagging techniques. Differential cross sections were measured and compared to leading order Monte Carlo programs and next-to-leading order QCD predictions. Speaker: Verena Schoenberg (Bonn University) • 10:30 AM coffee break 30m • 11:00 AM Measurement of the charm fragmentation into D* mesons at HERA 15m The charm fragmentation function has been measured in D* photoproduction with the ZEUS detector at HERA using an integrated luminosity of 120 pb-1. The fragmentation function is measured versus z, the ratio of E+p_parallel for the D* meson and that for the associated jet, where E is the energy and p_parallel the longitudinal momentum relative to the jet axis. Jets were reconstructed using the k_T clustering algorithm and required to have transverse energy greater than 9 GeV. The D* meson associated with the jet was required to have a transverse momentum greater than 2 GeV. The measured function is compared to different fragmentation models incorporated in leading-logarithm Monte Carlo simulations and a next-to-leading-order calculation. The results are similar to those from e+e- experiments. The process of charm quark fragmentation is studied using$D^{*\pm}$meson production in deep-inelastic scattering as measured by the H1 detector at HERA. Two different regions of phase space are investigated defined by the presence or absence of a jet containing the$D^{*\pm}$meson in the event. The parameters of fragmentation functions are extracted for QCD models based on leading order matrix elements and DGLAP or CCFM evolution of partons together with string fragmentation and particle decays. Additionally, they are determined for a next-to-leading order QCD calculation in the fixed flavour number scheme using the independent fragmentation of charm quarks to$D^{*\pm}$mesons. Speaker: Shuangshi Fang (DESY) • 11:15 AM Heavy flavour production at LHC 25m The Large Hadron Collider (LHC) will open up a new era in high energy physics. The expected large cross sections for heavy-flavour production in proton-proton collisions at √s = 14 TeV will allow detailed studies of production mechanisms and an extensive test of QCD. Since charm and beauty has been proposed as a good probe to study hot QCD matter (the so-called Quark-Gluon Plasma), the understanding of the production mechanisms in elementary proton-proton collisions is of primary importance as reference for studies in heavy-ion collisions. In this talk, the heavy-flavour physics program of the ALICE, ATLAS and CMS experiments will be reviewed. Speaker: Dr Alessandro Grelli (Utrecht University) • 11:40 AM Transverse-momentum resummation for gaugino-pair production at hadron colliders 15m We present a first precision analysis of the transverse-momentum spectrum of gaugino pairs produced at the Tevatron and the LHC with center-of-mass energies of 1.96 and 10 or 14 TeV, respectively. Our calculation is based on a universal resummation formalism at NLL order, which is consistently matched to the perturbative prediction at O(\alpha_s). Numerical results are given for the "gold-plated" associated production of neutralinos and charginos decaying into three leptons with missing transverse energy as well as for the pair production of neutralinos and charginos at two typical benchmark points in the constrained MSSM. We show that the matched resummation results differ considerably from the Monte Carlo predictions employed traditionally in experimental analyses and discuss the impact on the determination of SUSY mass parameters from missing stransverse mass spectra. We also investigate in detail the theoretical uncertainties coming from scale variations, parton-density functions, and non-perturbative effects. Speaker: Mr Jonathan Debove (LPSC Grenoble) • 11:55 AM Threshold resummation for the LHC: all order colour structure and application to squark production 15m We present a factorization formula for the production of pairs of heavy coloured particles in hadronic collision at the production threshold. We construct a basis in colour space that diagonalizes the soft function appearing in the factorization formula to all orders in perturbation theory. We perform a resummation of soft gluon effects in momentum space and present results for the example of squark-antisquark production at the LHC. Speaker: Christian Schwinn (IPPP Durham) • 12:10 PM On qualitative aspects of the choice of factorization schemes at NLO 15m Although the choice of a factorization scheme is as important as the choice of a factorization scale, the dependence of theoretical predictions (at finite order) on the choice of a factorization scheme has been little investigated. This is due to the fact that the freedom in the choice of a factorization scheme is enormous, even at NLO. Every factorization scheme can be unambiguously specified by the corresponding higher order splitting functions, which can be chosen at will. However, in practice not all possible choices provide reasonable predictions at NLO. The NLO splitting functions that correspond to an applicable factorization scheme should satisfy some nontrivial conditions, which can be easily formulated in the space of Mellin moments. If these conditions are not satisfied, then the corresponding parton distribution functions diverge for low x as x^xi with xi=-4.63 for nf=3 and xi=-3.85 for nf=4 where nf is the number of active flavours. This occurs even if the NLO splitting functions have better low x behaviour than the LO ones. The NLO hard scattering cross-sections behave for low x in a similar way as the parton distributions. It is likely that in such a factorization scheme the cancellation between large negative and positive numbers in expressions for physical quantities is incomplete at NLO and the obtained results are thus unreasonable. An example of a factorization scheme which appears at first sight as applicable but which does not satisfy the conditions is the factorization scheme in which all NLO splitting functions vanish and which would thus be otherwise optimal for generating NLO initial state parton showers, because in this scheme the NLO initial state parton showers are formally identical to the LO ones. It is worth mentioning that the conditions give no restriction on non-singlet splitting functions. Speaker: Mr Karel Kolar (Institute of Physics, Prague) • 12:25 PM lunch break 2h 5m • 2:30 PM QCD vs. MC: Drell-Yan pT distribution 15m The parton shower algorithms sums up large logarithms. In general we can say that they are able to sum up the leading logarithmic contributions almost for all important quantities but we have less confidence when we want to say something about the next-to-leading logarithmic contributions. In this talk I will discuss a strategy how to validate parton shower algorithms against some know analytic result. I will focus on the Drell-Yan pT distribution since this is one of the most important non-trivial observable what can test the initial state shower in the Monte Carlo programs and it can provide some guidelines how to define modified leading order parton distribution functions for general purpose event generation. Speaker: Dr Zoltan Nagy (DESY) • 2:45 PM Three- and Four-jet Production at Low x at HERA 15m Three- and four-jet production is measured in deep-inelastic ep scattering at low x and Q^2 with the H1 detector using an integrated luminosity of 44.2 pb^-1. Several phase space regions are selected for the three-jet analysis in order to study the underlying parton dynamics from global topologies to the more restrictive regions of forward jets close to the proton direction. The measurements of cross sections for events with at least three jets are compared to fixed order QCD predictions of${\mathcal{O}}(\alpha_s^2)$and${\mathcal{O}}(\alpha_s^3) $and with Monte Carlo simulation programs where higher order effects are approximated by parton showers. A good overall description is provided by the${\mathcal{O}}(\alpha_s^3) $calculation. Too few events are predicted at the lowest$x \sim 10^{-4}$, especially for topologies with two forward jets. This hints to large contributions at low x from initial state radiation of gluons close to the proton direction and unordered in transverse momentum. The Monte Carlo program in which gluon radiation is generated by the colour dipole model gives a good description of both the three- and the four-jet data in absolute normalisation and shape. Speaker: Prof. Jacek Turnau (Institute of Nuclear Physics, Krakow) • 3:00 PM Studies of forward jets and production of W,Z within kt factorisation approach 15m We are interested in processes which probe partonic structure where the partons carry a small fraction of the protons momentum. In particular the physics of forward jets and production of W,Z, bosons allows for this studies. In our approach we apply kt factorisation framework and perform simulations using Monte Carlo generator CASCADE. Speaker: Dr Krzysztof Kutak (Deutsches Elektronen-Synchrotron (DESY)) • 3:15 PM Mini experimental review of low-x at LHC 20m Feasibility studies are presented on forward jet production at the LHC with the CMS detector, assuming the integrated luminosity 1 pb-1, together with studies of inclusive Z and W production, as well as low-mass Drell Yan with the LHCb detector. The potential sensitivity of the CMS and the LHCb experiments to the proton PDFs at low x_Bj is discussed. The feasibility of observing hard diffraction at the LHC with the first 10-100 1 pb-1 collected by the CMS detector are also summarized. Studies of single-diffractive di-jet production, single-diffractive W boson production, Y photoproduction and di-jet production with a large rapidity gap between jets in pp collisions are presented. Speaker: Mrs Silvia Ochesanu (Antwerpen University) • 4:00 PM coffee break 30m • 4:30 PM Jet-gap-jet events at Tevatron and LHC 15m Double diffractive events are a direct test of BFKL resummations at Tevatron and LHC. In this new study, we compute for the first time the BFKL NLL cross section for two jet events with a large rapidity gap between jets. The BFKL NLL formalism leads to a good description of D0 data, and we provide in addition some predictions for LHC. Speaker: Dr Christophe Royon (IRFU-SPP, CEA Saclay) • 4:45 PM Mini review, hard diffraction and CEP at LHC. 20m The LHC experiments provide an unprecedented coverage in pseudo-rapidity. This advantage and high LHC luminosity allows for interesting studies of exclusive diffractive production, probing gluon physics and testing pQCD, and which can eventually lead to discovery physics. The talk is focused on the CMS program, the ATLAS is also mentioned briefly, and includes discussion of the exclusive production of upsilon and chi_b mesons, and of dijets. Speaker: Dr Grzegorz Brona (CERN) • 5:25 PM Diffractive PDFs and factorisation tests at HERA 20m Diffractive photoproduction of dijets was measured with the ZEUS detector at the ep collider HERA using an integrated luminosity of 77.2 pb-1. The measurements were made in the kinematic range Q2 < 1 GeV2 , 0.20 < y < 0.85 and xIP < 0.025, where Q2 is the photon virtuality, y is the inelasticity and xIP is the fraction of the proton momentum taken by the diffractive exchange. The two jets with the highest transverse energy, ETjet , were required to satisfy ETjet > 7.5 and 6.5 GeV, respectively, and to lie in the pseudorapidity range 1.5 <eta_jet < 1.5. Differential cross sections were compared to perturbative QCD calculations using available parameterisations of diffractive parton distributions of the proton. Measurements are presented of single and double-differential dijet cross sections in diffractive photoproduction ($Q2 < 0.01 GeV2$) based on 1999 and 2000 HERA data with an integrated luminosity of 54$pb^{-1}$. The event topology is given by$ep ightarrow eXY$, where the system X, containing at least two jets, is separated from a leading low-mass proton dissociative system Y by a large rapidity gap. The dijet cross sections are compared to leading order Monte Carlo models and to next-to-leading order QCD predictions, based on recent diffractive parton densities obtained by H1. The next-to-leading order calculations predict larger cross sections than observed. The suppression of the data relative to the calculation is investigated as a function of various kinematic variables. Ratios of the diffractive to inclusive single-differential dijet cross sections are measured for the first time. Differential dijet cross sections in diffractive deep-inelastic scattering are measured with the H1 detector at HERA using an integrated luminosity of 51.5 pb-1. The selected events are of the type ep --> eXY, where the system X contains at least two jets and is well separated in rapidity from the low mass proton dissociation system Y. The dijet data are compared with QCD predictions at next-to-leading order based on diffractive parton distribution functions previously extracted from measurements of inclusive diffractive deep-inelastic scattering. The prediction describes the dijet data well at low and intermediate zpom (the fraction of the momentum of the diffractive exchange carried by the parton entering the hard interaction) where the gluon density is well determined from the inclusive diffractive data, supporting QCD factorisation. A new set of diffractive parton distribution functions is obtained through a simultaneous fit to the diffractive inclusive and dijet cross sections. This allows for a precise determination of both the diffractive quark and gluon distributions in the range 0.05<0.9. In particular, the precision on the gluon density at high momentum fractions is improved compared to previous extractions. ZEUS inclusive diffractive cross-sections data were used in a DGLAP next-to-leading-order QCD analysis to extract the diffractive parton distribution functions. Data on diffractive dijet production in deep inelastic scattering were also included in the fit to constrain the gluon density. Diffractive photoproduction dijet were used to test the extracted parton densities. Speaker: Alberto Garfagnini (Padova University and INFN) • 5:45 PM Diffractive open charm production from the dipole model analysis 15m The most promising QCD based approach to DIS diffraction is formulated in terms of dipole models. In this analysis, we consider two important parameterisations of the dipole scattering amplitude, called GBW and CGC in which parton saturation results are built in. We present a precise comparison of the results of the dipole models using these two parameterisations with the newest data from HERA. The comparison we performed prompt us to discuss some subtle points of the dipole models, mostly related to the qqg component, and connect them to the approach based on the diffractive parton distributions evolved with the Dokshitzer-Gribov-Lipatov-Altarelli-Parisi (DGLAP) equations. Within the latter approach, the diffractive open charm production, which is the main goal of this analysis, is particularly interesting since it is sensitive to a diffractive gluon distribution. Thus, we extracted the diffractive gluon distribution from the dipole model formulae to use it for the computation of the charm contribution to F2D. We found good agreement with the HERA data on the diffractive open charm production both for the the gluon distributions from the considered dipole models and the DGLAP fits to HERA data from our earlier analysis for diffractive parton distributions with higher twist. Speaker: Ms Agnieszka Łuszczak (Institut of Nuclear Physics PAN Cracow) • 9:00 AM 6:15 PM VI. QCD in Hadronic Physics Exhibition room B ### Exhibition room B #### Kraków, Poland The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków • 9:00 AM Inclusive Photoproduction of rho^0, K^{*0} and phi Mesons at HERA 20m Inclusive non-diffractive photoproduction of rho(770)^0, K^*(892)^0 and phi(1020) mesons is investigated with the H1 detector in ep collisions at HERA. The corresponding average \gamma p centre-of-mass energy is 210 GeV. The mesons are measured in the transverse momentum range 0.5 Speaker: Grazyna Nowak (IFJ PAN Krakow) • 9:20 AM First Observation of Hadronic Final State Charge Asymmetry in High Q^2 Deep-Inelastic Scattering at HERA 20m A first measurement of the charge asymmetry in the scattered hadronic final state in high Q^2 deep-inelastic ep neutral current scattering at HERA has been made. The difference between the normalised distribution of the scaled momentum, xp, for positive and negative particles, measured in the current region of the Breit frame, has been studied together with its evolution as a function of Q^2. The results are compared to Monte Carlo models at the hadron and parton level. Speaker: Daniel Traynor (Queen Mary, University of London) • 9:40 AM Particle spectra at ZEUS 25m The charged multiplicity distributions and the mean charged multiplicity have been investigated in inclusive neutral current deep inelastic ep scattering with the ZEUS detector at HERA using an integrated luminosity of 38.6 pb-1. The measurements were performed in the current region of the Breit frame, as well as in the current fragmentation region of the hadronic centre-of-mass frame. The KNO-scaling properties of the data were investigated and the energy dependence was studied using different energy scales. The data are compared to results obtained in e+e- collisions and to previous DIS measurements as well as to leading-logarithm parton-shower Monte Carlo predictions. The scaled momentum distributions of charged particles in jets have been measured for dijet photoproduction with the ZEUS detector at HERA using an integrated luminosity of 359 pb-1. The distributions are compared to predictions based on perturbative QCD carried out in the framework of the modified leading-logarithmic approximation (MLLA) and assuming local parton-hadron duality (LPHD). The universal MLLA scale, Lambda_eff , and the LPHD parameter, k^ch , are extracted. Speakers: Lydia Shcheglova (Moscow State University), Dr Lydia Shcheglova (Nuclear Physics Institute of Moscow State University) • 10:05 AM Charm and strange particles production at ZEUS 25m Inclusive K0sK0s production in ep collisions at HERA was studied with the ZEUS detector using an integrated luminosity of 0.5 fb-1. Enhancements in the mass spectrum were observed and are attributed to the production of f2(1270)/a20(1320), f2'(1525) and f0(1710). Masses and widths were obtained using a fit which takes into account theoretical predictions based on SU(3) symmetry arguments, and are consistent with the PDG values. The f0(1710) state, which has a mass consistent with a glueball candidate, was observed with a statistical significance of 5 standard deviations. However, if this state is the same as that seen in gamma gamma->K0sK0s, it is unlikely to be a pure glueball state. The production of excited charm, D_1(2420)^0 and D_2^{*}(2460)^0, and charm-strange, D_{s1}(2536)+/-, mesons in ep collisions was measured with the ZEUS detector at HERA using an integrated luminosity of 126 pb^-1. Masses, widths and helicity parameters were determined. The measured yields were converted to the rates of c quarks hadronising as a given excited charm meson and to the ratios of the dominant D_2^{*}(2460)^0 and D_{s1}(2536)^\pm branching fractions. A search for the radially excited charm meson, D^*(2640)+/-, was also performed. The results are compared with those measured previously and with theoretical expectations. Speakers: Vladimir Aushev (Kiev National University, and Institute for Nuclear Research), Dr Volodymyr Aushev (DESY/INR) • 10:30 AM coffee break 30m • 11:00 AM Recent results and prospects on exploring the helicity structure of the proton at RHIC in high-energy polarized proton-proton collisions 25m One of the primary goals of the high-energy spin physics program at RHIC is to determine the polarized gluon contribution,$\Delta G$, to proton spin. The most recent STAR measurements of the longitudinal double-spin asymmetries,$A_{LL}$, for the inclusive production of jets, neutral and charged pions at mid-rapidity from collisions at a center of mass energy of$\sqrt{s} = 200\,$GeV will be presented. STAR has also begun measurements of di-jet production, and is preparing for future measurements of gamma+jet production. At leading order, both processes provide access to the initial parton kinematics, allowing a direct determination of the parton momentum dependence of$\Delta g(x)$. The production of$W^{-(+)}$bosons provides an ideal tool to study the spin-flavor structure of the proton, in particular contribution from the sea anti-quarks.$W^{-(+)}$bosons are produced in$\bar{u}+d\,(\bar{d}+u)$collisions and can be detected through their leptonic decays,$e^{-}+\bar{\nu}_{e}\,(e^{+}+\nu_{e})$, where only the respective charged lepton is measured. The suppression of QCD background over W boson signal events by several orders of magnitude is accomplished by using the highly segmented STAR Electromagnetic Calorimeter (EMC) allowing for hadron suppression based on shower shape analysis, requiring an isolation criteria suppressing jet events, and vetoing di-jet events based on the measured away side energy. Results of full scale simulations and reconstruction of expected W and QCD background yields will be shown. The STAR experiment has recently completed collecting data for exploratory run 9 with longitudinaly polarized p+p collisions at$\sqrt{s}=500\,$GeV. The current analysis status and plans for future STAR measurements at$\sqrt{s} = 500\,\$GeV in polarized proton-proton collisions will be presented.
Speaker: Mr Jan Balewski (MIT)
• 11:25 AM
Selected recent HERMES results on parton distribution and fragmentation functions 25m
The HERMES experiment at HERA has performed a new determination of the strange quark distribution s(x) from multiplicities of charged kaons in semi-inclusive deep-inelastic scattering (SIDIS) of 27.6 GeV electrons/positrons from deuterium. The extracted distribution function (DF) is much softer than that previously derived from dimuon events in neutrino/antineutrino scattering and those currently used in global PDF fits. Azimuthal asymmetries of identified hadrons in SIDIS from a transversely polarized hydrogen target and from unpolarized hydrogen and deuterium targets were measured. The former are caused by a convolution of the chiral-odd Collins fragmentation function (FF) and quark transversity (DF) or the convolution of the unpolarized FF and the naive time-reversal odd Sivers DF which can be related to orbital angular momenta of quarks in a polarized nucleon. The latter allow to access flavour dependent information about quark intrinsic transverse momenta and spin-orbit correlations. Examples are the Cahn effect, generated by the non-zero transverse motion of quarks and the Boer-Mulders effect, originating from a coupling between quark transverse momentum and transverse spin.
Speaker: Prof. Klaus Rith (University of Erlangen-Nürnberg and DESY)
• 11:50 AM
New results on quark helicity distributions and gluon polarization from the COMPASS experiment at CERN 20m
The new results on quark helicity distributions and on gluon polarization Delta_G/G from the COMPASS experiment will be presented. COMPASS is polarized DIS experiment using polarized muons with an energy of 160 GeV scattered off a polarised deuteron and proton targets. Quark helicity distributions are obtained from inclusive and semi-inclusive reactions from 2002-2004 and 2006 deuteron data and from 2007 proton data. The gluon polarisation Delta_G/G is determined from photon-gluon fusion (PGF )events. Two methods based on LO QCD approximation are used to extract PGF events: the selection of open-charm events via observation of D0 and D* mesons or a pairs of high-pT hadrons. The open-charm result is obtained from the data collected in 2002-2006 and it is updated with additional charm contributions. For these contributions a new method of the signal strength parameterization based on a neural network classification is used. The high-pT hadron pair result is obtained from 2002-2004 data using a new method of accounting for background processes.
Speaker: Dr Krzysztof Kurek (Soltan Institute for Nuclear Studies)
• 12:10 PM
QCD factorization beyond leading twist in exclusive processes: rhoT-meson production 20m
Exclusive processes in hard electroproduction with asymptotic gamma* p center of mass energy is one of the best place for understanding QCD in the perturbative Regge limit. The HERA experiment recently provided precise data for rho electroproduction, including all spin density matrix elements. From QCD, it is expected that such a process should factorize between a hard (calculable) coefficient function, and hadronic (P and rho) matrix elements. Such a factorization is up to now only proven for a longitudinaly polarized rho. Within the kt-factorization approach (valid at large s_gamma* p), we evaluate the impact factor of the transition gamma* -> rhoT taking into account the twist 3 contributions. We show that a gauge invariant expression is obtained with the help of QCD equations of motion. More generally, relying on these equations and on the gauge invariance of the factorized amplitude, the non-perturbative Distribution Amplitudes can be reduced to a minimal set. This opens the way to a consistent treatment of factorization for exclusive processes with a transversally polarized vector meson.
Speaker: Dr Samuel Wallon (Laboratoire de Physique Théorique)
• 12:30 PM
lunch break 2h
• 2:30 PM
SDMEs in exclusive rho^0 electroproduction 25m
Spin Density Matrix Elements (SDMEs) describing the angular distribution of exclusive rho^0 electroproduction and decay are determined in the HERMES experiment with 27.6 GeV beam energy on unpolarized hydrogen and deuterium targets, and on transversely polarized hydrogen target. Those are extracted in the kinematic region 1 < Q^2 < 7 GeV^2, 3 < W < 6.3 GeV, and -t < 0.4 GeV^2. Within the given experimental uncertainties, a hierarchy of relative sizes of helicity amplitudes is observed. A small but statistically significant deviation from the hypothesis of s-channel helicity conservation is observed. An indication is seen of a contribution of unnatural-parity-exchange amplitudes; these amplitudes are naturally generated with a quark-exchange mechanism.
Speaker: Dr Alexander Borissov (DESY)
• 2:55 PM
Measurement of Bc mass and lifetime at LHCb 25m
The Bc mass and lifetime measurements using the exclusive decay Bc -> Jpsi pi at the LHCb experiment were studied. About 300 signal events are expected for a data set which corresponds to an integrated luminosity of 1 fb-1, with a B/S ratio around 2. Based on these data, the Bc mass and lifetime can be measured with expected statistical errors below 2 MeV/c^2 and 30 fs, respectively
Speaker: Mr Wenbin QIAN (LAL,Orsay and Tsinghua University)
• 3:20 PM
The Quark Model via an hbar expansion of QCD 20m
I discuss the possibility that the quark model emerges as the lowest order of an hbar expansion of QCD bound states. Bound state calculations are generally complicated by backward (in time) motion of their relativistic constituents (Z-graphs, corresponding to pair production in a time-ordered formulation). I show that in the absence of loops (i.e., at lowest order in hbar) bound state dynamics may equivalently be formulated using a vacuum where all antifermion states are filled (d^\dag|0> = 0) and fermions only propagate forward in time. The derivation of the Dirac equation in an external potential then becomes straightforward. Fermion-antifermion states are bound by the instantaneous Coulomb (A^0) potential which is determined by the equation of motion (EOM) for each Fock state amplitude. The EOM has a homogeneous solution which gives a linear potential when the direction of the instantaneous field is along the pair separation, as required for minimal action. The solutions are expected to be exact at lowest order in hbar, as evidenced by the fact that the the bound states (evaluated at equal time in all frames) have Lorentz covariant energies, while their relativistic wave functions transform in a novel way.
Speaker: Prof. Paul Hoyer (Helsinki University)
• 3:40 PM
Is the X(3872) molecular hypothesis compatible with CDF data? 20m
Assuming that the X(3872) is a D0- \bar D0* molecule, we estimate its prompt production cross section at Tevatron and compare our results with the CDF data. We use different hadronization models, namely the ones implemented in Pythia and in Herwig, in order to have an estimate of the associated uncertainties. We give an upper bound for the theoretical cross section and a lower bound for the experimental one. According to our preliminary results, S-wave resonant scattering seems to be unlikely to allow the formation of a loosely bound molecule in high energy hadronic collisions. Some alternative mechanisms are discussed
Speaker: Dr Fulvio piccinini (INFN Pavia)
• 4:00 PM
Exact beta function and glueball spectrum in large N Yang-Mills theory. 15m
In the pure large N Yang-Mills theory there is a quasi BPS sector that is exactly solvable at large N. It follows an exact large N beta function and the glueball spectrum in this sector. The main technical tool is localization of the loop equation for quasi BPS Wilson loops by homological deformations of the loop, somehow in analogy with Witten's cohomological localization by a coboundary deformation.
Speaker: Dr Marco Bochicchio (INFN Roma1)
• 4:15 PM
coffee break 20m
• 4:35 PM
Inelastic J/psi production at HERA 25m
Inelastic Photo-production of J/Psi mesons is studied in ep-scattering at HERA. The J/psi decay angular distributions have been measured with the ZEUS detector, using an integrated luminosity of 468 pb^-1. The range in photon-proton centre-of-mass energy, W, was 50
Speaker: Riccardo Brugnera (Padova University and INFN)
• 5:25 PM
Experimental evidence for piK-atoms 20m
We present evidence for the first observation of electromagnetically bound pion-kaon pairs (piK- atoms) with the DIRAC-II experiment at the CERN-PS. The mean life of piK-atoms is related to the s-wave piK-scattering lengths, a measurement of which is relevant to low energy QCD, in particular chiral perturbation theories including the s-quarks. The atoms are produced by a 24 GeV/c proton beam in a thin Pt-target and the dissociated pions and kaons analyzed in a two-arm magnetic spectrometer. The observed enhancement at low relative momentum corresponds to the production of 173 +- 54 piK-atoms. From these first data we derive a lower limit for the mean life of 0.8 fs at the 90% confidence level.
Speaker: Prof. Claude Amsler (University of Zurich)
• 5:45 PM
Search for a D*p resonance at HERA II 15m
A possible resonance decaying into the D*-proton final state is investigated in deep inelastic scattering at HERA. The data were taken with the H1 detector in the years 2004 to 2007 and correspond to an integrated luminosity of ~348 pb^-1 thus increasing the available data significantly compared to the analysis of HERAI data.
Speaker: Katja Krueger (Heidelberg University)
• 9:00 AM 4:30 PM
VII. Standard Model Electroweak Physics Middle Lecture Hall A

### Middle Lecture Hall A

#### Kraków, Poland

The Auditorium Maximum of the Jagiellonian University 33 Krupnicza Street 31-123 Kraków
• 9:00 AM
Measurement of the W Boson Mass and Width with 1 fb-1 of D0 Run II Data 20m
We present the most precise single measurement of the W boson mass and and a measurement of the W width using data collected with the D0 experiment. An integrated luminosity of 1 fb-1 yields 499,830 W->evcandidates. The mass is measured with an uncertainty of less than 45 MeV while the width uncertainty is less than 75 MeV.
Speaker: Dr Mikolaj Cwiok (University of Warsaw, Institute of Experimental Physics)
• 9:20 AM
W boson mass measurement in the ATLAS experiment 15m
A precise measurement of the mass of the W boson will be essential to provide improved indirect constraints, e.g. on the Higgs boson mass. Using new methods developed for this challenging measurement, the performance expected is presented, evaluating various sources of systematic uncertainties, both of experimental and theoretical nature. The focus of this contribution will be on the expectation for the initial data taking and results will be shown for an integrated luminosity of 15 pb-1. Prospects on the total uncertainties which may be obtained with an integrated luminosity of 10 fb-1 will be given.
Speaker: Ms Nathalie Besson (CEA/Saclay IRFU/SPP)
• 9:35 AM
Measurement of the W-boson mass at the LHC: Shortcuts revisited. 15m