Dr
Christoph Pahl
(MPI for Physics Munich)
16/07/2009, 09:00
QCD at Colliders
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...
Dr
Biagio DI MICCO
(Istituto Nazionale di Fisica Nucleare)
16/07/2009, 09:00
QCD in hadronic physics
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 -->...
Mrs
Julia Vogel
(Albert-Ludwigs-Universität Freiburg)
16/07/2009, 09:00
Astroparticle Physics
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...
Dr
Eric Kajfasz
(Centre de Physique des Particules de Marseille)
16/07/2009, 09:00
Higgs and New Physics
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...
Jose Ocariz
(Universite Paris Diderot and IN2P3)
16/07/2009, 09:00
Flavour Physics
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...
Dr
Ignacio Sevilla
(CIEMAT)
16/07/2009, 09:00
Detectors (LHC and R&D) and Accelerators
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...
Prof.
Wieslaw Placzek
(Marian Smoluchowski Institute of Physics, Jagiellonian University)
16/07/2009, 09:00
Standard Model Electroweak Physics
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...
Dr
Andreas van Hameren
(IFJ-PAN, Krakow)
16/07/2009, 09:15
QCD at Colliders
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...
Dr
Thorsten Lux
(IFAE)
16/07/2009, 09:15
Detectors (LHC and R&D) and Accelerators
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...
Mr
Zeeshan Ahmed
(Caltech)
16/07/2009, 09:15
Astroparticle Physics
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...
Mr
Miguel Vidal
(CIEMAT, Madrid)
16/07/2009, 09:15
Higgs and New Physics
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...
Dr
Cecilia Tarantino
(University Roma Tre)
16/07/2009, 09:15
Flavour Physics
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...
Dr
Alexander Mueck
(Paul Scherrer Institut)
16/07/2009, 09:18
Standard Model Electroweak Physics
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...
Dr
Paolo Gauzzi
(University of Rome "La Sapienza")
16/07/2009, 09:20
QCD in hadronic physics
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...
Dr
Valentin Kozlov
(Forschungszentrum Karlsruhe)
16/07/2009, 09:30
Astroparticle Physics
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...
Neus Lopez March
(IFIC (Universitat de València - CSIC ))
16/07/2009, 09:30
Flavour Physics
Joerg Behr
(Hamburg University)
16/07/2009, 09:30
QCD at Colliders
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...
Prof.
Krzysztof Piotrzkowski
(UCLouvain)
16/07/2009, 09:30
Detectors (LHC and R&D) and Accelerators
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,...
Dr
Anna Kulesza
(RWTH Aachen)
16/07/2009, 09:35
Higgs and New Physics
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...
Dr
Krzysztof Sliwa
(Tufts University)
16/07/2009, 09:36
Standard Model Electroweak Physics
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.
Dr
Gianluca Lamanna
(SNS & INFN Pisa)
16/07/2009, 09:40
QCD in hadronic physics
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...
Dr
Panos Christakoglou
(NIKHEF - Utrecht University)
16/07/2009, 09:45
Detectors (LHC and R&D) and Accelerators
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...
Dr
Muhammed Deniz
(Instructor)
16/07/2009, 09:45
Astroparticle Physics
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...
Dr
Vincenzo Lombardo
(INFN Milano)
16/07/2009, 09:50
Flavour Physics
Dr
Nirmalya Parua
(Indiana University, Bloomington)
16/07/2009, 09:50
QCD at Colliders
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,...
Dr
David Khatidze
(Brown University)
16/07/2009, 09:54
Standard Model Electroweak Physics
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.
Dr
Marie-Helene Genest
(Ludwig-Maximilians-Universität München)
16/07/2009, 09:55
Higgs and New Physics
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...
Prof.
Themis Bowcock
(CERN)
16/07/2009, 10:00
Detectors (LHC and R&D) and Accelerators
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...
Dr
Alfredo Davide Ferella
(University of Zurich (UZH))
16/07/2009, 10:00
Astroparticle Physics
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...
Dr
Maurizio Bonesini
(Sezione INFN Milano Bicocca)
16/07/2009, 10:05
QCD in hadronic physics
(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.
Dr
Eli Ben-Haim
(LPNHE-Paris)
16/07/2009, 10:10
Flavour Physics
Claudia Glasman
(Univer. Autonoma De Madrid)
16/07/2009, 10:10
QCD at Colliders
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...
Dr
Aristotelis Kyriakis
(NCSR Demokritos)
16/07/2009, 10:12
Standard Model Electroweak Physics
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...
Bernadette Heyburn
(University of Colorado)
16/07/2009, 10:15
Detectors (LHC and R&D) and Accelerators
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...
Dr
Vadym Zhuravlov
(Max Planck Institut fuer Physik)
16/07/2009, 10:15
Higgs and New Physics
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.
Dr
Lucia Masetti
(Bonn University)
16/07/2009, 11:00
Detectors (LHC and R&D) and Accelerators
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...
Anton POLUEKTOV
(University of Warwick / Budker INP), Dr
Anton Poluektov
(Warwick / BINP)
16/07/2009, 11:00
Flavour Physics
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...
Prof.
Oscar Adriani
(University of Florence and INFN Florence)
16/07/2009, 11:00
Astroparticle Physics
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...
Dr
Sandro Uccirati
(TTP Karlsruhe)
16/07/2009, 11:00
Standard Model Electroweak Physics
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.
Dr
Sébastien Descotes-Genon
(LPT Orsay (CNRS/Univ. Paris Sud 11))
16/07/2009, 11:00
QCD in hadronic physics
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...
Dr
Eilam Gross
(Weizmann Institute), Prof.
Eilam Gross
(Weizmann Institute of Science)
16/07/2009, 11:00
Higgs and New Physics
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.
Dr
Maciej Skrzypek
(IFJ-PAN)
16/07/2009, 11:00
QCD at Colliders
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...
Dr
Adam Matyja
(Institute of Nuclear Physics PAN ,ul. Radzikowskiego 152, 31-342 Kraków, Poland)
16/07/2009, 11:15
Detectors (LHC and R&D) and Accelerators
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...
Ms
Nele Boelaert
(Lund University - Div. of Experimental High-Energy Physics)
16/07/2009, 11:15
QCD at Colliders
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...
Dr
Satoshi Mishima
(DESY)
16/07/2009, 11:15
Flavour Physics
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...
Dr
Joseph Haley
(For the D0 Collaboration)
16/07/2009, 11:18
Standard Model Electroweak Physics
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...
Dr
Vladimir DRUZHININ
(Budker Institute of Nuclear Physics, Novosibirsk, Russia)
16/07/2009, 11:20
QCD in hadronic physics
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...
Dr
Andrey Loginov
(University of Yale)
16/07/2009, 11:20
Higgs and New Physics
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....
Prof.
Jin Chang
(Purple Mountain Observatory)
16/07/2009, 11:25
Astroparticle Physics
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...
Prof.
Marta Calvi
(University Milano Bicocca)
16/07/2009, 11:30
Flavour Physics
Dr
Iacopo Vivarelli
(University of Freiburg)
16/07/2009, 11:30
QCD at Colliders
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...
Dr
Toyoko Orimoto
(California Institute of Technology)
16/07/2009, 11:30
Detectors (LHC and R&D) and Accelerators
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...
DURMUS DEMIR
(IZTECH)
16/07/2009, 11:35
Higgs and New Physics
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...
Ms
Viviana Cavaliere
(CDF Collaboration, INFN Pisa, University of Siena)
16/07/2009, 11:36
Standard Model Electroweak Physics
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...
Dr
Arafat Gabareen Mokhtar
(SLAC National Accelerator Laboratory)
16/07/2009, 11:40
QCD in hadronic physics
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...
Dr
Giuseppe Tartarelli
(INFN - Sezione di Milano (Italy)), Mr
Julien Labbé
(LPSC, Université Joseph Fourier Grenoble 1, CNRS/IN2P3, Institut Polytechnique de Grenoble)
16/07/2009, 11:45
Detectors (LHC and R&D) and Accelerators
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...
Mr
Joel Jones Perez
(Universitat de Valencia)
16/07/2009, 11:45
Flavour Physics
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...
Dr
Leonard Apanasevich
(University of Illinios at Chicago)
16/07/2009, 11:50
QCD at Colliders
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...
Mr
Luigi Tibaldo
(INFN Padova)
16/07/2009, 11:50
Astroparticle Physics
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...
Dr
Eyal Brodet
(Tel-Aviv University)
16/07/2009, 11:54
Standard Model Electroweak Physics
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...
Dr
Edmond Berger
(Argonne National Laboratory)
16/07/2009, 11:55
Higgs and New Physics
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...
Dr
Marcin Konecki
(Institute of Experimental Physics, University of Warsaw, Warsaw, Poland)
16/07/2009, 12:00
Detectors (LHC and R&D) and Accelerators
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...
Mr
Wolfgang Altmannshofer
(TU Munich)
16/07/2009, 12:00
Flavour Physics
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....
Sookyung Choi
(Gyeongsang)
16/07/2009, 12:05
QCD in hadronic physics
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 $\mathcal{B}(\bar{B}^0 \to K^- Z(4430)^+) \times \mathcal{B}(Z(4430)^+ \to \pi^+ \psi') = (3.2^{+1.8}_{-0.9}{}^{+5.3}_{-1.6}) \times 10^{-5}$,...
Prof.
D0 H1
(DESY, FNAL)
16/07/2009, 12:10
QCD at Colliders
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...
Dr
Katarzyna Wichmann
(DESY)
16/07/2009, 12:10
Higgs and New Physics
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...
Prof.
Krzysztof Piotrzkowski
(UCLouvain)
16/07/2009, 12:12
Standard Model Electroweak Physics
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...
Amarjit Soni
(Brookhaven National Lab)
16/07/2009, 12:15
Flavour Physics
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...
Dr
Claudio Ferretti
(University of Michigan)
16/07/2009, 12:15
Detectors (LHC and R&D) and Accelerators
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...
Dr
Kathrin Egberts
(Max-Planck-Institut fuer Kernphysik, Heidelberg)
16/07/2009, 12:15
Astroparticle Physics
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...
Remi Louvot
(École Polytechnique Fédérale de Lausanne (EPFL))
16/07/2009, 14:30
Flavour Physics
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...
Mr
Nils-Erik Bomark
(University of Bergen)
16/07/2009, 14:30
Astroparticle Physics
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...
Ms
Anastasia Bolshakova
(Joint Institute for Nuclear Research)
16/07/2009, 14:30
QCD in hadronic physics
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...
Dr
Giancarlo Ferrera
(Florence University)
16/07/2009, 14:30
QCD at Colliders
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...
Dr
Katarzyna Grebieszkow
(Warsaw University of Technology)
16/07/2009, 14:30
Heavy Ions
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...
Dr
Mike Mulhearn
(Columbia University)
16/07/2009, 14:30
Higgs and New Physics
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...
Dr
Andrea Ferroglia
(Johannes Gutenberg Univestitaet Mainz)
16/07/2009, 14:30
Standard Model Electroweak Physics
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...
Dr
Murilo Rangel
(Laboratoire de l'Accélérateur Linéaire)
16/07/2009, 14:45
QCD at Colliders
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...
Dr
carlos yaguna
(universidad autonoma de madrid)
16/07/2009, 14:45
Astroparticle Physics
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...
Dr
Andrzej Rybicki
(H.Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences)
16/07/2009, 14:45
Heavy Ions
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...
Burkard Reisert
(MPI)
16/07/2009, 14:50
QCD in hadronic physics
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...
Dr
Michele Giunta
(University of Pisa)
16/07/2009, 14:50
Higgs and New Physics
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...
Mr
Jan Morlock
(University of Karlsruhe)
16/07/2009, 14:50
Flavour Physics
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...
Dr
Sebastien GREDER
(IPHC, Strasbourg, France)
16/07/2009, 14:55
Standard Model Electroweak Physics
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....
Prof.
Paul Kooijman
(Univ. of Amsterdam/Univ. Utrecht/Nikhef)
16/07/2009, 15:00
Astroparticle Physics
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...
Dr
Pietro Cortese
(Universita' del Piemonte Orientale in Alessandria and INFN of Torino)
16/07/2009, 15:00
Heavy Ions
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...
Krzysztof Nowak
(Zuerich University)
16/07/2009, 15:05
QCD at Colliders
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...
Prof.
Phillip Gutierrez
(University of Oklahoma)
16/07/2009, 15:05
Flavour Physics
Mr
Dean Hidas
(University of Duke)
16/07/2009, 15:10
Higgs and New Physics
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...
Dr
Alison Lister
(University of Geneva)
16/07/2009, 15:13
Standard Model Electroweak Physics
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...
Dr
Christian Spiering
(DESY)
16/07/2009, 15:15
Astroparticle Physics
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...
Dr
Alexey DRUTSKOY
(University of Cincinnati)
16/07/2009, 15:15
QCD in hadronic physics
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...
Mr
Gergo Hamar
(MTA KFKI RMKI Research Institude for Particle and Nuclear Physics)
16/07/2009, 15:20
Heavy Ions
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...
Mr
Dominik Horn
(University of Karlsruhe)
16/07/2009, 15:20
Flavour Physics
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 →...
Ms
Imai Jen-La Plante
(Enrico Fermi Institute, University of Chicago)
16/07/2009, 15:25
QCD at Colliders
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...
Dr
Bjoern Penning
(University of Freiburg)
16/07/2009, 15:30
Higgs and New Physics
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...
Mr
Alexander Kappes
(ECAP, University Erlangen-Nuremberg)
16/07/2009, 15:30
Astroparticle Physics
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...
Dr
Luca Fiorini
(IFAE)
16/07/2009, 15:31
Standard Model Electroweak Physics
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...
Dr
Veronique Ziegler
(SLAC National Accelerator Laboratory)
16/07/2009, 15:35
QCD in hadronic physics
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.
Dr
Lars Sonnenschein
(RWTH Aachen IIIA)
16/07/2009, 15:35
Flavour Physics
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...
Torsten Dahms
(CERN)
16/07/2009, 15:35
Heavy Ions
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...
Prof.
Guey-Lin Lin
(National Chiao-Tung University)
16/07/2009, 15:45
Astroparticle Physics
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...
Dr
MOKHTAR GABAREEN
(SLAC National Accelerator Laboratory)
16/07/2009, 15:45
Higgs and New Physics
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...
Dr
Tara Shears
(University of Liverpool)
16/07/2009, 15:45
QCD at Colliders
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.
Dr
Lorenzo Bellagamba
(INFN Bologna)
16/07/2009, 15:49
Standard Model Electroweak Physics
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...
Dr
CHIEN-YI MA
(NATIONAL TAIWAN UNIVERSITY)
16/07/2009, 15:50
Flavour Physics
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...
Dr
Gergely Gabor Barnafoldi
(MTA KFKI RMKI)
16/07/2009, 15:50
Heavy Ions
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...
isabelle ripp-baudot
(IPHC Strasbourg, CNRS/IN2P3)
16/07/2009, 16:30
Flavour Physics
Dr
Pedro Jimenez-Delgado
(Technische Universität Dortmund)
16/07/2009, 16:30
QCD at Colliders
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...
Dr
Radja Boughezal
(University of Zurich)
16/07/2009, 16:30
Higgs and New Physics
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...
Chao Liu
(USTC)
16/07/2009, 16:30
QCD in hadronic physics
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...
Mr
Bruno Casal Laraña
(Instituto de Fisica de Cantabria (CSIC - U. Cantabria))
16/07/2009, 16:30
Standard Model Electroweak Physics
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...
Dr
Pawel Staszel
(Jagiellonian University)
16/07/2009, 16:30
Heavy Ions
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...
Prof.
Daniele Fargion
(Physics Depart. and INFN, Rome1)
16/07/2009, 16:30
Astroparticle Physics
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, ...
Dr
James Catmore
(Lancaster University, UK)
16/07/2009, 16:45
Flavour Physics
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,...
Dr
KWANG-CHANG LAI
(Institute of Physics, National Chiao Tung University)
16/07/2009, 16:45
Astroparticle Physics
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...
Dr
Junichi Tanaka
(ICEPP, University of Tokyo)
16/07/2009, 16:45
Higgs and New Physics
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.
Jan Kretzschmar
(University of Liverpool)
16/07/2009, 16:45
QCD at Colliders
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...
Reinhard Schwienhorst
(Michigan State University), Prof.
Reinhard Schwienhorst
(Michigan State University)
16/07/2009, 16:45
Standard Model Electroweak Physics
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...
Floriana Giannuzzi
(University of Bari and INFN)
16/07/2009, 16:50
QCD in hadronic physics
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...
Dr
Krzysztof Wozniak
(Institute of Nuclear Physics PAN, Krakow, Poland)
16/07/2009, 16:50
Heavy Ions
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...
Prof.
Paula Eerola
(University of Helsinki)
16/07/2009, 17:00
Flavour Physics
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...
Ms
Cristina Botta
(University of Turin and INFN)
16/07/2009, 17:00
Higgs and New Physics
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...
Prof.
Robin Erbacher
(Univ. of California, Davis)
16/07/2009, 17:00
Standard Model Electroweak Physics
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...
Michael Prouza
(Institute of Physics, Prague, Czech Republic)
16/07/2009, 17:00
Astroparticle Physics
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...
Burkard Reisert
(Max-Planck-Institut für Physik, München)
16/07/2009, 17:05
QCD at Colliders
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...
Prof.
Julia Velkovska
(Vanderbilt University)
16/07/2009, 17:10
Heavy Ions
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.
Dr
Benoit Blossier
(CNRS)
16/07/2009, 17:10
QCD in hadronic physics
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...
Dr
Giovanni Onorato
(INFN Napoli - Università "Federico II" Napoli)
16/07/2009, 17:15
Flavour Physics
presenters will be chousen
Dr
Daniele Martello
(Dip. of Physics and INFN - Lecce (Italy))
16/07/2009, 17:15
Astroparticle Physics
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...
Dr
Yvonne Peters
(University of Manchester)
16/07/2009, 17:20
Standard Model Electroweak Physics
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...
Dr
Philipp Kant
(TTP Karlsruhe)
16/07/2009, 17:20
Higgs and New Physics
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...
Juan Terron
(Univer. Autonoma De Madrid)
16/07/2009, 17:25
QCD at Colliders
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...
Lech Wiktor Piotrowski
(University of Warsaw)
16/07/2009, 17:30
Astroparticle Physics
"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...
Piotr Bozek
(Institute of Nuclear Physics PAN Krakow/Rzeszow University)
16/07/2009, 17:30
Heavy Ions
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...
Mr
David Straub
(Technische Universität München)
16/07/2009, 17:30
Flavour Physics
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)...
Julia Ruiz Tabasco
(Cinvestav - Unidad Mérida)
16/07/2009, 17:30
QCD in hadronic physics
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...
Dr
Per Jonsson
(Imperial College London)
16/07/2009, 17:35
Higgs and New Physics
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,...
Pedro Ferreira da Silva
(LIP / CMS)
16/07/2009, 17:40
Standard Model Electroweak Physics
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...
Dr
Robi Peschanski
(IPhT, Saclay)
16/07/2009, 17:45
Heavy Ions
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...
Ms
Voica Radescu
(DESY)
16/07/2009, 17:45
QCD at Colliders
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...
Dr
Jonatan Piedra
(University of Florida)
16/07/2009, 17:45
Astroparticle Physics
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...
Mr
Lars Hofer
(Karlsruhe Institut of Technology)
16/07/2009, 17:45
Flavour Physics
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...
Mr
Krisztian Krajczar
(Eotvos University)
16/07/2009, 17:50
QCD in hadronic physics
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...
Dr
Dimitris Fassouliotis
(University of Athens)
16/07/2009, 17:50
Higgs and New Physics
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...
Mr
Salvatore RAPPOCCIO
(Johns Hopkins University)
16/07/2009, 18:00
Standard Model Electroweak Physics
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 >...
Prof.
Claude Amsler
(University of Zurich)
16/07/2009, 18:00
Astroparticle Physics
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...
Karin Daum
(Wuppertal University)
17/07/2009, 09:00
QCD at Colliders
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,...
Mr
Jan Kapitan
(Nuclear Physics Institute, Academy of Sciences of the Czech Republic)
17/07/2009, 09:00
Heavy Ions
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...
Grazyna Nowak
(IFJ PAN Krakow)
17/07/2009, 09:00
QCD in hadronic physics
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<p_T<7 GeV and the rapidity range |y_{lab}|<1. Differential cross sections are presented as a function of...
Bostjan Golob
(University of Ljubljana, Jozef Stefan Inst.)
17/07/2009, 09:00
Flavour Physics
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...
Mr
Florian Fraenkle
(Karlsruhe Institute of Technology)
17/07/2009, 09:00
Neutrino Physics
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...
Dr
Mikolaj Cwiok
(University of Warsaw, Institute of Experimental Physics)
17/07/2009, 09:00
Standard Model Electroweak Physics
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.
Dr
Jared Yamaoka
(University of Duke), Dr
Jared Yamaoka
(Duke University)
17/07/2009, 09:00
Higgs and New Physics
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...
Shohei Nishida
(KEK)
17/07/2009, 09:15
Flavour Physics
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...
Dr
Vera Beillet-Kovalenko
(IPHC/JINR)
17/07/2009, 09:15
Neutrino Physics
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...
Dr
Claudio Gatti
(Laboratori Nazionali di Frascati - INFN)
17/07/2009, 09:20
Higgs and New Physics
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...
Dr
Domenico ELIA
(INFN Bari)
17/07/2009, 09:20
Heavy Ions
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...
Daniel Traynor
(Queen Mary, University of London)
17/07/2009, 09:20
QCD in hadronic physics
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....
Katerina Lipka
(DESY)
17/07/2009, 09:20
QCD at Colliders
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...
Ms
Nathalie Besson
(CEA/Saclay IRFU/SPP)
17/07/2009, 09:20
Standard Model Electroweak Physics
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...
Dr
Tobias Hurth
(CERN)
17/07/2009, 09:30
Flavour Physics
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...
Dr
Florent Fayette
(LPNHE Paris)
17/07/2009, 09:35
Standard Model Electroweak Physics
The claim that the W mass will be measured at the LHC with a precision of O(10) MeV is critically reviewed. It is argued that such a precision cannot be achieved, unless a dedicated measurement programme, specific to the LHC collider is pursued. We propose such a programme. Its main target is to significantly improve the experimental control of the relative polarization of the W+, W- and...
Prof.
Riccardo Brugnera
(University of Padova and INFN Padova)
17/07/2009, 09:35
Neutrino Physics
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...
Dr
Matthias Mozer
(Vrije Universiteit Brussel)
17/07/2009, 09:40
Higgs and New Physics
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...
Massimo Corradi
(Bologna University and INFN), Dr
massimo corradi
(INFN Bologna)
17/07/2009, 09:40
QCD at Colliders
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
...
Dr
Adam Trzupek
(Institute of Nuclear Physics PAN)
17/07/2009, 09:40
Heavy Ions
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...
Lydia Shcheglova
(Moscow State University), Dr
Lydia Shcheglova
(Nuclear Physics Institute of Moscow State University)
17/07/2009, 09:40
QCD in hadronic physics
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....
Dr
Cecilia Tarantino
(University Roma Tre)
17/07/2009, 09:45
Flavour Physics
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...
Prof.
Thomas ferbel
(Universities of Rochester/Maryland)
17/07/2009, 09:50
Standard Model Electroweak Physics
We present three analyses of the mass of the top quark (mt) using top-antitop candidate events collected by the DO experiment during the current run of the Fermilab Tevatron Collider: (i) a 3.6 events/fb sample of data in the lepton+jets channel analyzed to extract a precision value of mt using the “Matrix-Element” method (ME), wherein each event probability is calculated from the differential...
Verena Schoenberg
(Bonn University)
17/07/2009, 09:55
QCD at Colliders
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...
Dr
Elena Guardincerri
(INFN Genova)
17/07/2009, 09:55
Neutrino Physics
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,...
Dr
Ivan Amos Cali
(M.I.T.)
17/07/2009, 10:00
Heavy Ions
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...
Mr
Lorenzo Basso
(PhD student)
17/07/2009, 10:00
Higgs and New Physics
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...
Dr
Marie-Helene Schune
(LAL-Orsay IN2P3/CNRS)
17/07/2009, 10:00
Flavour Physics
Vladimir Aushev
(Kiev National University, and Institute for Nuclear Research), Dr
Volodymyr Aushev
(DESY/INR)
17/07/2009, 10:05
QCD in hadronic physics
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,...
Mr
Jacob Linacre
(Oxford)
17/07/2009, 10:10
Standard Model Electroweak Physics
We report the results of the measurements of the top quark mass using top pair events corresponding to an integrated luminosity of more than 4 fb-1 from proton-antiproton collisions at the Tevatron, recorded by the CDF II detector. We present different results using various techniques in the lepton+jets, dilepton, and all-jets channels, and describe the current status of the systematic...
Dr
Carlos Chavez
(University of Liverpool)
17/07/2009, 10:15
Flavour Physics
Dr
Carmen Palomares
(CIEMAT)
17/07/2009, 10:15
Neutrino Physics
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...
Dr
Enrique Palencia
(FNAL)
17/07/2009, 10:15
Higgs and New Physics
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.
Dr
Amir Rezaeian
(Santa Maria Universidad/Universitaet Regensburg)
17/07/2009, 10:20
Heavy Ions
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...
Dr
Michel Jaffre
(Laboratoire de l Accelerateur Lineaire, Orsay, France)
17/07/2009, 11:00
Higgs and New Physics
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...
Shuangshi Fang
(DESY)
17/07/2009, 11:00
QCD at Colliders
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...
Mr
Jan Balewski
(MIT)
17/07/2009, 11:00
QCD in hadronic physics
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...
Dr
Simon Eidelman
(Budker Institute of Nuclear Physics, Novosibirsk, KEDR Collaboration)
17/07/2009, 11:00
Flavour Physics
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.
Andreas Hoecker
(CERN)
17/07/2009, 11:00
Standard Model Electroweak Physics
Results from the global Standard Model (SM) fit to electroweak precision data, including
newest Tevatron measurements, are reviewed and discussed. The constraint on the Higgs boson
mass obtained from the fit is convolved with the high-scale behaviour of the
Higgs quartic coupling to derive likelihoods for stability, metastability or instability
scenarios of the SM. Information from the...
Mr
Viktor Pec
(IPNP Charles University in Prague)
17/07/2009, 11:00
Neutrino Physics
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...
Dr
Kim Vervink
(CERN)
17/07/2009, 11:00
Detectors (LHC and R&D) and Accelerators
Present constraints on physics beyond the Standard Model are heavily influenced by measurements of rare processes where observables are theoretically well controlled. Rare B decays will offer opportunities to make further world class constraints on new physics at the LHC, and a host of such decays will be studied at the LHCb experiment.
Given the small bb-bar cross-section expected and...
Eunil Won
(Korea University)
17/07/2009, 11:15
Flavour Physics
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...
Dr
Tuula Maki
(CERN)
17/07/2009, 11:15
Detectors (LHC and R&D) and Accelerators
The CMS trigger system must reduce an input data rate from the LHC bunch-crossing frequency of 40 MHz to a rate which will be written to permanent storage. This online event selection is performed in two steps. At the first level (L1) the rate is reduced to 100 kHz, based on calorimeter and muon trigger subsystem information. Then the selected events are forwarded to the high level trigger...
Dr
Alessandro Grelli
(Utrecht University)
17/07/2009, 11:15
QCD at Colliders
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...
Dr
Marcin Misiaszek
(Jagellonian University)
17/07/2009, 11:15
Neutrino Physics
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...
Dr
Viatcheslav Valuev
(UCLA)
17/07/2009, 11:20
Higgs and New Physics
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...
Dr
Daniel Maitre
(IPPP)
17/07/2009, 11:25
Standard Model Electroweak Physics
In this talk, we report on a recent next-to-leading order QCD calculation of the production of a W boson in association with three jets at hadron colliders. The computation is performed by combining two programs, BlackHat for the computation of the virtual one-loop matrix elements and Sherpa for the real emission part.
Prof.
Klaus Rith
(University of Erlangen-Nürnberg and DESY)
17/07/2009, 11:25
QCD in hadronic physics
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...
Prof.
Richard Kass
(Ohio State University)
17/07/2009, 11:30
Flavour Physics
Dr
Sinead Farrington
(University of Oxford)
17/07/2009, 11:30
Detectors (LHC and R&D) and Accelerators
This paper will give an overview of the ATLAS trigger design and its innovative features. It will
describe the valuable experience gained in running the trigger reconstruction and event selection in the fastchanging
environment of the detector commissioning during 2008. It will also include a description of the
trigger selection menu and its 2009 deployment plan from first collisions to the...
Dr
Andrea Giammanco
(Louvain)
17/07/2009, 11:35
Higgs and New Physics
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...
Dr
Bari Osmanov
(University of Florida/Fermilab)
17/07/2009, 11:35
Neutrino Physics
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...
Mr
Jonathan Debove
(LPSC Grenoble)
17/07/2009, 11:40
QCD at Colliders
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...
Dr
costas papadopoulos
(ncsr demokritos)
17/07/2009, 11:45
Standard Model Electroweak Physics
We report on recent progress on NLO QCD calculations using the
OPP method. The method gives a complete description of the one-loop matrix element.
We will also discuss the development of the programmes, HELAC-1L and HELAC-DIPOLES that allow for a fully numerical evaluation of NLO QCD corrections.
Prof.
Tomasz Skwarnicki
(Syracuse University)
17/07/2009, 11:45
Flavour Physics
please see abstracts 634 and 637.
Dr
Guido Volpi
(INFN Pisa)
17/07/2009, 11:45
Detectors (LHC and R&D) and Accelerators
Hadron collider experiments search for extremely rare processes hidden in much larger background levels. Only a tiny fraction of the produced collisions can be stored on tape and an enormous real-time data reduction is needed. This requires massive computing power to minimize the on-line execution time of complex algorithms. A multi-level trigger is an effective solution for an otherwise...
Dr
Krzysztof Kurek
(Soltan Institute for Nuclear Studies)
17/07/2009, 11:50
QCD in hadronic physics
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...
Mr
fabio happacher
(INFN - LNF)
17/07/2009, 11:50
Higgs and New Physics
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...
Dr
Justin Evans
(University College London)
17/07/2009, 11:55
Neutrino Physics
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...
Christian Schwinn
(IPPP Durham)
17/07/2009, 11:55
QCD at Colliders
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...
Mr
Oleg Brandt
(University of Oxford)
17/07/2009, 12:00
Detectors (LHC and R&D) and Accelerators
The Large Hadron Collider (LHC) at CERN is the world largest particle
accelerator. It will collide two proton beams at an unprecedented center of
mass energy of 14 TeV. ATLAS is equipped with a charge particle tracking
system built on two technologies: silicon and drift tube based detectors,
composing the ATLAS Inner Detector (ID). The alignment of the tracking
system poses a challenge...
Dr
Stefania Ricciardi
(STFC Rutherford Appleton Laboratory)
17/07/2009, 12:00
Flavour Physics
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...
Dr
David South
(TU Dortmund)
17/07/2009, 12:05
Standard Model Electroweak Physics
Measurements of the production of events containing isolated high energy leptons (electrons, muons or taus) and missing transverse momentum produced in ep collisions have been performed with the H1 and ZEUS detectors at HERA in the period 1994-2007. In addition, topologies with more than one high energy isolated lepton (electron or muon) are analyzed. The data samples corresponds to an...
Mr
Karel Kolar
(Institute of Physics, Prague)
17/07/2009, 12:10
QCD at Colliders
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...
Dr
Samuel Wallon
(Laboratoire de Physique Théorique)
17/07/2009, 12:10
QCD in hadronic physics
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)...
Dr
Mark Williams
(Lancaster University / Fermilab)
17/07/2009, 12:10
Higgs and New Physics
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...
Prof.
Andrei Gritsan
(Johns Hopkins University)
17/07/2009, 12:15
Detectors (LHC and R&D) and Accelerators
We present the first results of the full CMS Silicon Tracker alignment based on several million reconstructed tracks from the cosmic data taken during the commissioning runs with the detector in its final position. Implication for CMS physics performance is discussed. The all-silicon design of the tracking system of the CMS experiment is expected to provide 1-2% resolution for 100 GeV tracks...
Prof.
David Miller
(Purdue University)
17/07/2009, 12:15
Flavour Physics
Dr
Henri PESSARD
(LAPP-IN2P3-CNRS)
17/07/2009, 12:15
Neutrino Physics
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...
Mr
Eram Rizvi
(Queen Mary and Westfield College)
17/07/2009, 12:20
Standard Model Electroweak Physics
Measurements of Neutral Current (NC) ep -> e X and Charged Current (CC) ep -> nu X cross sections by the H1 and ZEUS collaborations are presented using HERA data recorded during the years 1994-2007. The cross sections are measured in the region of large negative four-momentum transfer squared Q2 >200 GeV^2. Single differential and double-differential cross-sections are extracted and and...
Dr
Zoltan Nagy
(DESY)
17/07/2009, 14:30
QCD at Colliders
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...
Dr
Patrizia CENCI
(Istituto Nazionale di Fisica Nucleare, Sezione di Perugia)
17/07/2009, 14:30
Flavour Physics
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...
Dr
Alexander Borissov
(DESY)
17/07/2009, 14:30
QCD in hadronic physics
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...
Dr
Simon Eidelman
(Budker Institute of Nuclear Physics, Novosibirsk)
17/07/2009, 14:30
Standard Model Electroweak Physics
An update of the theoretical prediction for the muon anomalous
magnetic moment within the Standard Model is presented. It is based
on recent low energy e+e- data for the leading order hadronic
contributions as well as developments in the estimates of the
hadronic light-by-light term. The theoretical prediction is confronted
to the world average value of the experimentally measured...
Dr
Ken Sakashita
(HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION, KEK)
17/07/2009, 14:30
Neutrino Physics
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...
Dr
David Miller
(University of Glasgow)
17/07/2009, 14:30
Higgs and New Physics
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...
Dr
Günther Geschonke
(CERN)
17/07/2009, 14:30
Detectors (LHC and R&D) and Accelerators
Two options for a linear e+e- collider are presently under development, the ILC and CLIC. The energy reach of the two machines is different, which leads to two different technological choices. ILC is based on superconducting acceleration technology, the CLIC design uses a two-beam acceleration system with normal conducting copper cavities. Nevertheless considerable synergy between the two...
Mrs
Evelina Marinova
(INFN Sezione di Perugia)
17/07/2009, 14:45
Flavour Physics
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...
Prof.
Alain Blondel
(DPNC university of Geneva)
17/07/2009, 14:45
Neutrino Physics
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...
Prof.
Jacek Turnau
(Institute of Nuclear Physics, Krakow)
17/07/2009, 14:45
QCD at Colliders
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...
Dr
Federico Nguyen
(INFN Sezione Roma TRE)
17/07/2009, 14:48
Standard Model Electroweak Physics
The KLOE experiment, operating at the Frascati phi-factory DAPHNE, has measured the differential cross section for the process e+ e- --> pi+ pi- gamma as a function of the pi+pi- invariant mass, M(pipi).
From the measured differential $M(pipi) spectrum inclusive of final state radiation, the total sigma(pi+pi-(gamma)) cross section is determined using the QED radiator function.
The...
Giacomo Cacciapaglia
(IPN Lyon)
17/07/2009, 14:50
Higgs and New Physics
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...
Mr
Wenbin QIAN
(LAL,Orsay and Tsinghua University)
17/07/2009, 14:55
QCD in hadronic physics
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
Ms
Monika Blanke
(Technische Universitaet Muenchen)
17/07/2009, 15:00
Flavour Physics
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...
Dr
Krzysztof Kutak
(Deutsches Elektronen-Synchrotron (DESY))
17/07/2009, 15:00
QCD at Colliders
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.
Prof.
Jan Kisiel
(Insitute of Physics, University of Silesia, Katowice, Poland)
17/07/2009, 15:00
Neutrino Physics
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.
Dr
Zhiqing Philippe Zhang
(LAL)
17/07/2009, 15:06
Standard Model Electroweak Physics
We revisit the procedure for comparing the pi pi spectral function measured in tau decays to that obtained in e+e- annihilation. We re-examine the isospin-breaking corrections using new experimental and theoretical input, and find improved agreement between the tau- --> pi- pi0 nu_tau branching fraction measurement and its prediction using the isospin-breaking-corrected e+e- --> pi+pi-...
Frank Zimmermann
(Cern)
17/07/2009, 15:10
Detectors (LHC and R&D) and Accelerators
The primary goal of CERN and the LHC community is to ensure that LHC is operated efficiently, that it achieves nominal performance in the shortest term, and that its performance steadily improves. Since several years the community has been discussing the directions for maximizing the physics reach of the LHC by upgrading the experiments, in particular ATLAS and CMS, the LHC machine and the...
Dr
Jackson Wu
(Institute of Theoretical Physics, University of Bern)
17/07/2009, 15:10
Higgs and New Physics
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...
Patrizia de Simone
(LNF - INFN)
17/07/2009, 15:15
Flavour Physics
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...
Dr
Muhammed Deniz
(Department of Physics, Middle East Technical University, Turkey; Institute of Physics, Academia Sinica, Taiwan.)
17/07/2009, 15:15
Neutrino Physics
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...
Mrs
Silvia Ochesanu
(Antwerpen University)
17/07/2009, 15:15
QCD at Colliders
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...
Prof.
Paul Hoyer
(Helsinki University)
17/07/2009, 15:20
QCD in hadronic physics
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...
Kiyoshi Hayasaka
(Nagoya)
17/07/2009, 15:21
Standard Model Electroweak Physics
We report a study of $\tau^- \to \pi^- \pi^+ \pi^- \nu$, $\tau^- \to K^- \pi^+ \pi^- \nu$, $\tau^- \to K^- K^+ \pi^- \nu$ and $\tau^- \to K^- K^+ K^- \nu$ decays using a 666 fb$^{-1}$ data sample collected with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider. We present the branching fractions as well as the unfolded mass spectra of the total hadronic system for these four...
Dr
Dennis D. Dietrich
(University of Southern Denmark)
17/07/2009, 15:30
Higgs and New Physics
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...
Dr
Marco Dreucci
(Istituto Nazionale di Fisica Nucleare)
17/07/2009, 15:30
Flavour Physics
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...
Dr
Vladimir Litvinenko
(Brookhaven National laboratory)
17/07/2009, 15:35
Detectors (LHC and R&D) and Accelerators
This talk is focused on possible designs and predicted performance if two proposed high-energy, high-luminosity electron-hadron colliders: eRHIC at BL and and LHeC at CERN. Both the eRHIC and the LHeC will add polarized electrons to the list of colliding species in these versatile hadron colliders: 10-20 GeV electrons to 250 GeV RHIC and 50-100 to 7 TeV LHC. Both colliders plan to operate in...
Ms
Elisa Guido
(INFN & University Genova)
17/07/2009, 15:39
Standard Model Electroweak Physics
A selection of electroweak measurements performed by the BaBar experiment operating at the Stanford Linear Accelerator Center is presented.
Using a sample of 122 million Y(3S) decays, we measure the ratio
R = BR(Y(1S) -> tautau)/BR(Y(1S) -> mumu); the
measurement is intended as a test of the lepton universality and
as a search for a light pseudoscalar Higgs boson in NMSSM
scenarios....
Dr
Fulvio piccinini
(INFN Pavia)
17/07/2009, 15:40
QCD in hadronic physics
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...
Prof.
Maria Krawczyk
(University of Warsaw)
17/07/2009, 15:45
Higgs and New Physics
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.
Dr
Krzysztof Graczyk
(Institute of Theoretical Physics, University of Wrocław)
17/07/2009, 15:45
Neutrino Physics
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...
Dr
Erika De Lucia
(Laboratori Nazionali di Frascati - INFN)
17/07/2009, 15:45
Flavour Physics
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...
Dr
Marco Bochicchio
(INFN Roma1)
17/07/2009, 16:00
QCD in hadronic physics
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...
Dr
Max Baak
(CERN)
17/07/2009, 16:30
Higgs and New Physics
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...
Wolfgang Dungel
(Institute for high energy physics, Austrian academy of Sciences)
17/07/2009, 16:30
Flavour Physics
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...
Dr
Christophe Royon
(IRFU-SPP, CEA Saclay)
17/07/2009, 16:30
QCD at Colliders
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.
Dr
Ferruccio Feruglio
(University of Padova)
17/07/2009, 16:30
Neutrino Physics
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...
Riccardo Brugnera
(Padova University and INFN)
17/07/2009, 16:35
QCD in hadronic physics
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<W<180 GeV. The
polar and azimuthal angles of the mu+ were measured in the J/psi rest
frame and compared to theoretical...
Dr
Amir Rahimi
(OSU)
17/07/2009, 16:45
Unified Theories, Strings, Non-perturbative QFT
We present updates on the searches for three $D^0 \to V \eta$ decays, where the $D^0$ comes from the decay $D^{*+}\to D^0 \pi^+$ and $V$ is a $\phi$, $\omega$ or $K^*$ vector meson. These results use a 467~fb$^{-1}$ data sample collected with the {\sl B{\scriptsize A}B{\scriptsize AR}} detector at SLAC.
Dr
Grzegorz Brona
(CERN)
17/07/2009, 16:45
QCD at Colliders
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...
Prof.
Jose Ramon Espinosa
(IFAE, Barcelona)
17/07/2009, 16:45
Higgs and New Physics
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...
Dr
Marcello Rotondo
(INFN Padova)
17/07/2009, 16:50
Flavour Physics
Dr
Zdenek Dolezal
(Charles University Prague)
17/07/2009, 16:55
Detectors (LHC and R&D) and Accelerators
The Belle detector at the KEKB electron-positron collider has collected approximately 800 million Upsilon(4S) events in its decade of operation. The KEKB group has proposed Super-KEKB, an upgrade of KEKB to increase the luminosity by two orders of magnitude during a three-year shutdown, with an ultimate goal of 8 x 10^35/cm^2/s luminosity. To exploit the improved luminosity, an upgrade of the...
Klaus Desch
(University of Bonn)
17/07/2009, 17:00
Higgs and New Physics
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...
James Morris
(The Ohio State University)
17/07/2009, 17:00
Unified Theories, Strings, Non-perturbative QFT
We present preliminary results of the search for the doubly-radiative
decay $D^{0} \rightarrow \gamma \gamma$ and the measurement of the
branching fraction of its associated background $D^{0} \rightarrow
\pi^{0}\pi^{0}$ in a data sample corresponding to an integrated
luminosity of ~470fb$^{-1}$ collected with the BaBar detector at the
PEP-II asymmetric $e^{+} e^{-}$ collider at SLAC. ...
Isamu Nakamura
(KEK)
17/07/2009, 17:05
Flavour Physics
Mr
Daniel Hernández
(Universidad Autónoma de Madrid, Theoretical Physics Department)
17/07/2009, 17:10
Neutrino Physics
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...
Dr
Christophe Royon
(IRFU-SPP, CEA Saclay)
17/07/2009, 17:15
Unified Theories, Strings, Non-perturbative QFT
We present a new method to test the Standard Model expectations at the LHC
using photon-induced WW production. Both W decay in the main ATLAS or CMS
detectors while scattered protons are measured in forward detectors.
The sensitivity to anomalous WW gamma quartic and triple gauge coupling can be improved
respectively by more than three orders of magnitude or
a factor 30 compared to the...
Dr
Gerhard Brandt
(DESY)
17/07/2009, 17:15
Higgs and New Physics
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...
Dr
Eric Prebys
(Fermi National Accelerator Laboratory)
17/07/2009, 17:20
Detectors (LHC and R&D) and Accelerators
As the highest energy collider in the world, the Tevatron
has been the centerpiece of Fermilab's physics program
for more than 20 years. This will all change with the
imminent startup of CERN's LHC.
This talk will describe how the lab plans to redefine its
mission in terms of the "intensity frontier", with a program
focusing on neutrino physics, precision measurements and
cutting...
Alberto Garfagnini
(Padova University and INFN)
17/07/2009, 17:25
QCD at Colliders
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...
Prof.
Claude Amsler
(University of Zurich)
17/07/2009, 17:25
QCD in hadronic physics
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...
Dr
Omar Miranda
(Depto de Fisica Cinvestav)
17/07/2009, 17:30
Neutrino Physics
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...
Dr
Peter Renkel
(Southern Methodist University)
17/07/2009, 17:30
Higgs and New Physics
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...
Dr
laurent schoeffel
(CEA Saclay)
17/07/2009, 17:30
Unified Theories, Strings, Non-perturbative QFT
We discuss the perspectives concerning a better determination of the proton structure in terms of quarks and gluons at LHC after describing the results coming from HERA and Tevatron. In a second part of the review, we describe the diffractive phenomena at HERA and Tevatron and the consequences for LHC. The focus will be given on perspectives for LHC, essentially on early measurements that...
Dr
Peter Marquard
(Institute for Theoretical Particle Physics, Karlsruhe, Germany)
17/07/2009, 17:35
Flavour Physics
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.
Ms
Agnieszka Łuszczak
(Institut of Nuclear Physics PAN Cracow)
17/07/2009, 17:45
QCD at Colliders
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...
Dr
Rob Edgecock
(STFC Rutherford Appleton Laboratory)
17/07/2009, 17:45
Detectors (LHC and R&D) and Accelerators
The EUROnu FP7 Design Study has recently begun to investigate possible future high intensity neutrino oscillation facilities that could be located in Europe and elsewhere. This talk will describe the major challenges of these facilities and the accelerator R&D work that is being undertaken, particularly by EUROnu, to meet them.
Shahram Rahatlou
(Sapienza University of Rome & INFN)
17/07/2009, 17:45
Higgs and New Physics
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...
Dr
Paul Hunt
(University of Warsaw)
17/07/2009, 17:45
Unified Theories, Strings, Non-perturbative QFT
The primordial power spectrum is important both for cosmological parameter estimation and for distinguishing between models of inflation. Many cosmological observables which probe inhomogenities are related to the power spectrum by a convolution with a transfer function. We show how two different deconvolution techniques, Tikhonov regularisation and the Backus-Gilbert method, can be used to...
Katja Krueger
(Heidelberg University)
17/07/2009, 17:45
QCD in hadronic physics
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.
Mr
Pietro Biassoni
(Universita' degli Studi and INFN Milano)
17/07/2009, 17:50
Flavour Physics
Mr
Emiliano Molinaro
(SISSA)
17/07/2009, 17:50
Neutrino Physics
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...
Dr
Maurizio Bonesini
(Sezione INFN Milano Bicocca)
17/07/2009, 18:00
Detectors (LHC and R&D) and Accelerators
Muon ionization cooling provides the only practical solution to prepare high brilliance beams necessary for a neutrino factory or muon colliders. The muon ionization cooling experiment (MICE) is under development at the Rutherford Appleton Laboratory (UK). It comprises a dedicated beam line to generate a range of input emittance and momentum, with time-of-flight and Cherenkov detectors to...
Dr
Joseph Conlon
(Oxford University)
17/07/2009, 18:00
Unified Theories, Strings, Non-perturbative QFT
I discuss string phenomenology, gauge threshold corrections and LARGE volume models. I describe scenarios for moduli stabilisation and supersymmetry breaking.
Sunghyon KYEONG
(Yonsei University)
18/07/2009, 09:00
Flavour Physics
Study of $B^+ \to \rho^+ \omega$ decay at Belle
We report the results of a search for the charmless decay $B^+ \to \rho^+ \omega$. The analysis is based on a large data sample recorded at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric-energy $e^+e^-$ collider.
Study of inclusive $B \to X_s \eta$ at Belle
We report results on a search for inclusive high...
Dr
Pierre Astier
(Paris University)
18/07/2009, 09:00
Cosmology and Gravitational Waves
I will review our current knowledge of cosmological parameters, with dark energy as a guideline.
I will briefly present some methods and preliminary results from the third year sample of the
Supernova Legacy Survey (SNLS). I will then discuss the future instruments and surveys.
Dr
Michal Malinsky
(KTH Stockholm)
18/07/2009, 09:00
Unified Theories, Strings, Non-perturbative QFT
The current status of the non-supersymmetric SO(10) GUTs is discussed from the point of view of the high scale unification of the running gauge couplings. The new refined analysis shows that, on the contrary to the common lore, several breaking chains are still perfectly compatible with the current phenomenological constraints imposed namely by the absolute neutrino mass scale and the proton...
Mr
Vitaliy Dodonov
(Max-Planck-Institut f. Kernphysik Heidelberg)
18/07/2009, 09:00
QCD at Colliders
The production of highly energetic forward neutrons has been studied in deep-inelastic scattering. The data were taken with the H1 detector at HERA in the years 2006-2007 and correspond to an integrated luminosity of 117 pb^-1. Semi-inclusive cross sections have been measured in the kinematic region 4 < Q^2 < 100 GeV^2, 0.7*10^-4 < x < 0.3*10^-1 and the fractional momentum of the neutron 0.3 <...
Dr
Gianmaria Collazuol
(Scuola Normale Superiore and INFN Pisa)
18/07/2009, 09:00
Higgs and New Physics
The SM prediction for the ratio of purely leptonic decay rates of the charged kaon $R_K=\Gamma(K_{e2}/\Gamma(K_{\mu2}))$ has an excellent sub-premille precision. Due to the helicity suppression of the SM contribution, the ratio is sensitive to non-SM effects; in particular, LFV contributions in the MSSM can modify it by a few percent without contradicting any other presently known experimental...
Dr
Marcin Kucharczyk
(Syracuse University)
18/07/2009, 09:00
Detectors (LHC and R&D) and Accelerators
The LHCb detector has been designed to study CP violation and other rare phenomena in B-meson decays up to a luminosity of $\sim 5.10^{32}\rm cm^{-2}s^{-1}$. We will describe the current limitations that prevent LHCb from exploiting the much higher luminosities available at the LHC, and what modifications can be made that allow data taking at an order of magnitude higher instantaneous...
Mr
Andreas Richter
(Physikalisches Institut IV, Univ. Erlangen-Nürnberg)
18/07/2009, 09:00
QCD in hadronic physics
Three distribution functions are needed to fully describe the nucleon at leading twist: the unpolarized distribution function q(x), the helicity distribution function $\Delta q(x)$ and the transversity spin distribution function $\Delta_T q(x)$. Transversity and transverse momentum-dependent parton distribution functions (TMDs) are been measured in semi-inclusive deep inelastic scattering...
Dr
Sandro Palestini
(CERN)
18/07/2009, 09:15
Detectors (LHC and R&D) and Accelerators
With LHC about to start collisions, plans are advancing on detector upgrades necessary to cope with the scenario of the super-LHC collider, with ten-fold increase in the collision rate.
The expected experimental conditions and the current detector studies, including an entirely new inner tracker system, are summarized. The detector technologies being considered for the upgrade of the Muon...
Cheng-Chin CHIANG
(National Taiwan University)
18/07/2009, 09:15
Flavour Physics
Observation of $B^+ \to \bar{K}{}^{*0}(892)K^+$ at Belle
We present a measurement of the branching fraction for the process $B^+ \to \bar{K}{}^{*0}(892)(\to K^-\pi^+)K^+$ based on a data sample of $657 \times 10^6$ $\Upsilon(4S) \to B\bar{B}$ events collected with the Belle detector at the KEKB $e^+e^-$ asymmetric-energy collider. A measurement of the charge asymmetry of $A_{CP}$ for this...
Dr
Takashi Shimomura
(Universidad de Valencia, Spain)
18/07/2009, 09:15
Higgs and New Physics
When the mass difference between the lightest slepton, the NLSP, and the lightest neutralino, the LSP, is smaller than the tau mass, the lifetime of the lightest slepton increases in many orders of magnitude with respect to typical lifetimes of other supersymmetric particles. In a general gravity-mediated MSSM, where the LSP is the neutralino, the lifetime of the lightest slepton is...
Dr
Eun-Kyung Park
(Physics Institute of Bonn University)
18/07/2009, 09:15
Unified Theories, Strings, Non-perturbative QFT
We investigate phenomenology of an SO(10) model which features two-step intermediate scale symmetry breaking, $SO(10) \to SU(4)_C \times SU(2)_L \times SU(2)_R \to SU(3)_C \times U(1)_{B-L} \times SU(2)_L \times SU(2)_R \to SU(3)_C \times SU(2)_L \times U(1)_Y$. We compare the low energy phenomenology of our model to mSUGRA with scalar masses, gaugino masses and trilinear couplings, which are...
Mr
Xavier Janssen
(Inter-University Institute for High Energies ULB-VUB Brussels)
18/07/2009, 09:20
QCD at Colliders
Exclusive rho^0 electroproduction at HERA has been studied with the ZEUS detector using 120 pb-1 of integrated luminosity collected during 1996-2000. The analysis was carried out in the kinematic range of photon virtuality 2 < Q2 < 160 GeV2, and gamma* p centre-of-mass energy 32 < W < 180 GeV. The results include the Q2 and W dependence of the gamma*p->rho^0 p cross section and the...
Mr
Florian Haas
(Technische Universität München, Physik Department E18, 85748 Garching, Germany)
18/07/2009, 09:25
QCD in hadronic physics
on behalf of the COMPASS collaboration
In addition to constituent qq(bar) pair configurations, four quark states or
gluonic excitations like hybrids or glueballs are also expected to contribute to the mesonic spectrum.
The most promising way to identify such states allowed by QCD is the search for
J^PC quantum number combinations which are forbidden in the constituent
quark...
Dr
Ignacio Sevilla
(CIEMAT)
18/07/2009, 09:25
Cosmology and Gravitational Waves
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 is a next generation sky survey aimed directly at understanding this mystery. We will build an extremely red sensitive 500 Megapixel camera, a 1 meter diameter, 2.2 degree field of view prime focus...
Dr
Carlo Civinini
(INFN - Firenze)
18/07/2009, 09:30
Detectors (LHC and R&D) and Accelerators
Following an expected increase of the LHC luminosity beyond its design value of 10^34 cm^-2s^-1 the CMS collaboration is planning for an upgrade of the experimental apparatus. In particular the silicon tracker should undergo a major rebuild to cope with the new ultimate luminosity of the upgraded collider (SLHC) which is foreseen to be a factor ten greater than the present limit. In these...
Prof.
Justin ALBERT
(Univ. of Victoria)
18/07/2009, 09:30
Higgs and New Physics
We present a search for decay of the Y(1S) meson into undetectable
final states, using a sample of Y(3S) mesons collected at
the PEP-II/BaBar B-factory. We tag the decay of the Y(3S) into
the Y(1S) through a pair of charged pions, and measure the rate at
which the Y(1S) decays into particles which do not interact with
the BaBar detector. Furthermore, we present a search for
charged...
Mr
Takaaki Nomura
(Saitama University)
18/07/2009, 09:30
Unified Theories, Strings, Non-perturbative QFT
We analyze a gauge-Higgs unification model which is based on a gauge theory defined on a six-dimensional spacetime with an $S^2$ extra-space. We impose a symmetry condition for a gauge field and non-trivial boundary conditions of the $S^2$. We provide the scheme for constructing a four-dimensional theory from the six-dimensional gauge theory under these conditions. We then construct a concrete...
Dr
Thomas Latham
(University of Warwick)
18/07/2009, 09:35
Flavour Physics
We present recent results from the BABAR experiment on three-body charmless hadronic B decays.
The results include searches for the decay of charged B mesons to the final state KSKSpi+ and for neutral B mesons to pi0KSKS, etaKSKS and eta'KSKS. We also present a Dalitz-plot analysis of charged B decays to the final state pi+pi+pi-. All analyses use a sample of approximately 465 million...
Dorota Szuba
(DESY)
18/07/2009, 09:40
QCD at Colliders
The exclusive photoproduction reaction gamma p -> Upsilon p has been
studied with the ZEUS experiment in ep collisions at HERA using an
integrated luminosity of 468 pb^-1. The measurement covers the kinematic
range 60<W<220 GeV and Q^2<1 GeV^2, where W is the photon-proton
centre-of-mass energy and Q^2 is the photon virtuality. These results,
which represent the analysis of the full ZEUS...
Dr
Agnieszka Pollo
(The Andrzej Soltan Institute for Nuclear Research)
18/07/2009, 09:40
Cosmology and Gravitational Waves
We discuss the evolution of clustering of galaxies back to z~2. For that purpose we use the VIMOS-VLT Deep Survey (VVDS) data. We analyze the evolution of the projected two-point correlation function for the global galaxy population and for particular galaxy classes, with different intrinsic luminosities, spectral types, colors and other properties. For the brightest galaxies (with L>L*), for...
Mr
Yoshiyuki Miyazaki
(Nagoya University)
18/07/2009, 09:45
Higgs and New Physics
We report results of a search for lepton flavor violating $\tau$ decays
into $l K_S$ and $l K_S K_S$ using a large data sample accumulated with
the Belle detector at the KEKB $e^+ e^-$ collider. The sensitivity to
the branching fractions is improved significantly compared to previous
experiments.
Dr
Giulio Pellegrini
(Centro Nacional de Microelectronica CNM-IMB-CSIC)
18/07/2009, 09:45
Detectors (LHC and R&D) and Accelerators
It is foreseen to significantly increase the luminosity of the Large Hadron Collider(LHC) at CERN around 2018 by upgrading the LHC towards the sLHC (Super-LHC). Due to the radiation damage to the silicon detectors used, the physics experiment will require new tracking detectors for sLHC operation. All-silicon central trackers are being studied in ATLAS, CMS and LHCb, with extremely radiation...
Dr
Diego Guadagnoli
(Technical University Munich)
18/07/2009, 09:45
Unified Theories, Strings, Non-perturbative QFT
After a short overview of the hypothesis of Yukawa Unification within
SUSY GUTs, I report on its viability in the light of the predictions
for quark masses, EW precision data and FCNC processes.
In particular, I discuss the phenomenological difficulties existing
when universalities for the soft SUSY-breaking terms at the GUT scale
are assumed, and how these difficulties can be overcome...
Ivana Hristova
(DESY)
18/07/2009, 09:50
QCD in hadronic physics
Exclusive production of $\pi^+$ mesons was studied with the HERMES
spectrometer at the DESY laboratory by scattering $27.6\,\mathrm{GeV}$ positrons and
electrons off a transversely nuclear-polarised hydrogen target.
The spin-averaged cross section was measured for values of the
virtuality of the exchanged photon $Q^2 > 1\,\mathrm{GeV}^2$ and the invariant
mass of the photon-nucleon system...
Prof.
Leonard Lesniak
(Henryk Niewodniczanski Institute of Nuclear Physics PAN, Krakow, Poland)
18/07/2009, 09:50
Flavour Physics
Dalitz plot analysis of three-body hadronic final states in B decays should
be performed in a unitary approach. A first step towards this goal will be to
enforce two-body unitarity. Here we apply this concept to the K pi channel for
the B --> K pi pi decays by using a unitary coupled channel model to describe
the kaon-pion interactions. The weak decay amplitudes, derived in QCD...
Dr
Krzysztof Turzynski
(Institute of Theoretical Physics, University of Warsaw)
18/07/2009, 09:55
Cosmology and Gravitational Waves
Supersymmetry breaking mediated by gauge interactions is regarded an attractive option due to the lack of new sources of flavor changing neutral currents other than those already present in the Standard Model. In models with gauge mediated supersymmetry breaking (GMSB), the dark matter particle is the gravitino. It is produced both thermally in scatterings in the hot plasma and non-thermally...
Dr
Wolfgang Schäfer
(IFJ PAN)
18/07/2009, 10:00
QCD at Colliders
Protons and antiprotons at collider energies are a source of high energy Weizs\"acker--Williams photons.
This opens up a possibility to study at the LHC exclusive photoproduction of heavy vector mesons at energies much larger than possible at the HERA accelerator.
We present the results of detailed studies of various distributions for the production of
heavy quarkonia (e.g. rapidity,...
Prof.
K.K. Gan
(The Ohio State University)
18/07/2009, 10:00
Detectors (LHC and R&D) and Accelerators
High-speed data transmission in a high radiation environment poses an immense challenge in the detector design. We investigate the feasibility of using optical links for the silicon trackers of the ATLAS experiment for the planned upgrade of the LHC. The planned upgrade with ten times higher collision rate will produce a similar increase in the radiation. One possibility for the optical...
Michael Herbst
(Kirchhoff-Institut für Physik, Universität Heidelberg)
18/07/2009, 10:00
Higgs and New Physics
A search for squarks in R-parity violating supersymmetry is performed
using the full ep data sample collected by the H1 detector at HERA at
a centre-of-mass energy of 319 GeV. This corresponds to a total
integrated luminosity of 440 pb^{-1}. The resonant production of
squarks via a Yukawa coupling lambda' is considered, taking into
account direct and indirect R-parity violating decay...
Dr
James Gray
(University of Oxford)
18/07/2009, 10:00
Unified Theories, Strings, Non-perturbative QFT
I will briefly review some aspects of recent work in heterotic string and M-theory as applied to string phenomenology. Emphasis will be placed on describing the strengths and weaknesses of this type of string construction as related to both model building and moduli stabilization.
Dr
Sébastien Descotes-Genon
(LPT Orsay (CNRS/Univ. Paris Sud 11))
18/07/2009, 10:05
Flavour Physics
We discuss the decay of B_c mesons into two light (pseudoscalar and vector) mesons. All these decay channels come from a single type of diagram, namely tree annihilation which allows us to derive simple relations among these processes. The size of annihilation contributions is an important issue in B physics, and we provide two different estimates in the case of non-leptonic charmless B_c...
Dr
Johan Messchendorp
(KVI/University of Groningen/PANDA collaboration)
18/07/2009, 10:10
QCD in hadronic physics
The physics of strong interactions is undoubtedly one of the
most challenging areas of modern science. Quantum
Chromo Dynamics (QCD) is reproducing the physics phenomena
only at distances much shorter than the size of the nucleon,
where perturbation theory can be used yielding results of
high precision and predictive power. At larger distance
scales, however, perturbative methods...
Dr
Masato Yamanaka
(ICRR, university of Tokyo)
18/07/2009, 10:10
Cosmology and Gravitational Waves
A scenario of the big-bang nucleosynthesis is analyzed within the minimal supersymmetric standard model, which is consistent with a stau-neutralino coannihilation scenario to explain the relic abundance of dark matter. We find that we can account for the possible discrepancy of the abundance of 7Li between the observation and the prediction of the big-bang nucleosynthesis by taking the mass of...
Dr
Roman Pasechnik
(Bogoliubov Laboratory of Theoretical Physics, JINR, Dubna 141980, Russia)
18/07/2009, 10:15
QCD at Colliders
We calculate several differential distributions for exclusive double diffractive scalar $\chi_c(0^{++})$, axial-vector $\chi_c(1^{++})$ and tensor $\chi_c(2^{++})$ mesons production in the proton-antiproton collisions at Tevatron and in
proton-proton collisions at RHIC and LHC. We use the formalism of unintegrated gluon distributions (UGDFs) within the $k_{\perp}$-factorisation approach. The...
Dr
Tobias Hurth
(CERN)
18/07/2009, 10:15
Higgs and New Physics
We consider scenarios with large flavour violating
entries in the squark mass matrices focusing on the mixing between
second and third generation squarks. These entries govern both,
flavour violating low energy observables on the one hand and
squark and gluino decays on the other hand.
We first discuss the constraints on the parameter space due to the
recent data on $B$ mesons from the...
Mr
Ricardo Marco-Hernández
(IFIC(CSIC-UV))
18/07/2009, 10:15
Detectors (LHC and R&D) and Accelerators
A readout system for microstrip silicon sensors has been developed as a result of collaboration among the University of Liverpool, the CNM of Barcelona and the IFIC of Valencia. The name of this collaboration is ALIBAVA and it is integrated in the RD50 Collaboration. This system is able to measure the collected charge in one or two microstrip silicon sensors by reading out all the channels of...
Dr
Juan Pablo Fernández
(CIEMAT)
18/07/2009, 10:20
Flavour Physics
We present recent CDF results on the properties of hadrons containing heavy quarks. These include a new measurement of the Bc production rate and updated measurement of B-hadron lifetimes.
Dr
Radoslaw Stompor
(CNRS, Laboratoire AstroParticule et Cosmologie, Paris, France)
18/07/2009, 11:00
Cosmology and Gravitational Waves
In many viable theoretical models primordial gravitational waves are predicted as a consequence of the early evolution of the Universe. Such waves will unavoidably leave an imprint on the Cosmic Microwave Background (CMB) anisotropies, which would be particularly noticeable in the so-called B-mode polarization. The precise measurements of the CMB polarization anisotropies are therefore one of...
Dr
Cristina Carloganu
(LPC/IN2P3/CNRS)
18/07/2009, 11:00
Detectors (LHC and R&D) and Accelerators
The CALICE collaboration is developing calorimeters for use in the
Particle Flow approach (PFA) to jet energy measurement in future particle
accelerator experiments. A highly granular electromagnetic calorimeter
is central to this program and two prototypes , based on two different
technologies were consequently built. Both are sampling calorimeters:
Silicon-Tungsten and...
Dr
Hans-Peter Morsch
(Institut fuer Kernphysik, Forschungszentrum Juelich)
18/07/2009, 11:00
QCD in hadronic physics
Assuming a Lagrangian of the strong interaction slightly different from quantum chromodynamics - by replacing the non-Abelian Yang-Mills term by the coupling of two gluons to J(pi)=0+ (the quantum numbers of the vacuum) with subsequent creation of quarks and/or antiquarks - the confinement of quarks is well understood. Further, hadron masses are generated by requiring "massless" quarks, which...
Jaroslaw WIECHCZYNSKI
(Institute of Nuclear Physics PAN, Krakow)
18/07/2009, 11:00
Flavour Physics
Study of $B \to D_s^* h$ decays
We report a measurement of the branching fractions for $B^0 \to D_s^* h$ decays using a large sample of $B\bar{B}$ decays collected with the Belle detector at the KEKB asymmetric energy $e^+e^-$ collider.
Improved measurements of $B \to D_s K$ and $B \to D_s\pi$ branching fractions
We report improved measurements of the $B\to D_s K$ and $B\to D_s\pi$...
Mr
Jonathan Burns
(HEMRES)
18/07/2009, 11:00
QCD at Colliders
Deeply Virtual Compton Scattering is the simplest interaction that allows access to Generalised Parton Distributions, a theoretical framework that can be used to describe the nucleon structure. The strong interest in GPDs results from the fact that they offer access to the total angular momentum of quarks inside the nucleon and to a 3-dimensional picture of nucleon structure. The measurement...
Dr
Jernej Kamenik
(INFN LNF)
18/07/2009, 11:00
Higgs and New Physics
One or more heavy spin-1 fields may replace the Higgs boson in keeping perturbative unitarity up to a few TeV while at the same time account for the ElectroWeak Precision Tests. We study the Drell-Yan production of heavy vector and axial-vector states of generic Higgsless models at hadron colliders. We analyse in particular the l+l-, WZ, and three SM gauge boson final states. In the l+l- case...
Dr
Marco Zagermann
(MPI for Physics, Munich)
18/07/2009, 11:00
Unified Theories, Strings, Non-perturbative QFT
During the past decade, the study of the cosmological implications of string theory has evolved into a very active and fruitful field of research. The remarkable progress in this area is to a large extent driven by the impressive advances in observational cosmology as well as by important theoretical progress, in particular, regarding the problem of moduli stabilization in string...
Mr
Tae Min Hong
(University of California -- Santa Barbara)
18/07/2009, 11:15
Flavour Physics
First, we report a study of ten Cabibbo-favored B decays to final states of the form B0bar,B- --> D(*) p pbar n pi, n=0,1,2. We measure the branching fractions and present their kinematic distributions using a data sample of 455 million B Bbar pairs collected with the BaBar detector at the PEP-II asymmetric-energy B Factory at SLAC. Second, we report the Dalitz plot analysis of B- --> D+ pi-...
Dr
Ezequiel Alvarez
(Universidad de Buenos Aires and CONICET)
18/07/2009, 11:15
Higgs and New Physics
We show how a resonance from the recently proposed Lee-Wick Standard Model could lead to wrong vertex displacements at LHCb.
We study which could be the possible 'longest lived' Lee-Wick particle that could be created at LHC, and we study its possible decays and detections. We conclude that there is a region in the parameter space which would give wrong vertex displacements as a unique...
Dr
laurent schoeffel
(CEA Saclay)
18/07/2009, 11:20
QCD at Colliders
Standard parton distribution functions contain neither information on the correlations between partons nor on their transverse motion, then a vital knowledge about the three dimensional structure of the nucleon is lost. Hard exclusive processes, in particular DVCS, are essential reactions to go beyond this standard picture. In the following, we examine the most recent data in this context and...
Mr
Felix Wick
(University of Karlsruhe)
18/07/2009, 11:20
QCD in hadronic physics
With growing datasets collected by the CDF II experiment, studies of the
spectroscopy of mesons containing heavy quarks becomes more exciting. The
CDF experiment has good capabilities in both charm and bottom sector. This
capability allowed also to contribute to the study of the Zoo of states
called X,Y,Z. In this area we present a recent update of the mass
measurement of X(3872). The...
Prof.
Jaroslav Cvach
(Institute of Physics of the AS CR, v.v.i., Na Slovance 2, 182 21 Prague 8, Czech Republic)
18/07/2009, 11:20
Detectors (LHC and R&D) and Accelerators
A prototype of a highly granular CALICE scintillator-steel hadron calorimeter using SiPMs as photodetectors has been tested in electron and hadron beams at CERN and Fermilab in the energy range 1-80 GeV. More than 7600 SiPMs - the highest number ever used - performed well over a period longer than 2 years and did not show an increase of noise. The electron data were used to validate the...
Prof.
Andrzej Krolak
(Institute of Mathematics Polish Academy of Sciences)
18/07/2009, 11:25
Cosmology and Gravitational Waves
I shall review stochastic sources of gravitational waves and prospects of their detection. A stochastic background of gravitational waves is expected to arise from a superposition of a large number of unresolved gravitational-wave sources of astrophysical and cosmological origin. I shall present the status of
the searches for stochastic gravitational wave sources by the LIGO and VIRGO...
Min-Zu Wang
(NTU)
18/07/2009, 11:30
Flavour Physics
Study of $B^+ \to p \bar{\Lambda} \pi^+ \pi^-$ at Belle
We study charmless $B^+$ decays to $p \bar{\Lambda} \pi^+ \pi^-$ final state using a 605 fb$^{-1}$ data sample collected at the $\Upsilon(4S)$ resonance with the Belle detector at the KEKB asymmetric energy $e^+ e^-$ collider. There are significant signals found with $p \bar{\Lambda}$ mass peaking near threshold. The branching...
Dr
Pablo G. Camara
(Ecole Polytechnique)
18/07/2009, 11:30
Unified Theories, Strings, Non-perturbative QFT
We briefly review the different approaches to model building within type IIB string theory and show the utility of open string wavefuntions for computing 4D physical couplings, such as Yukawa couplings. In the second part of the talk we report on some of the recent developments in extending these techniques to compactifications with closed string fluxes or with non-diagonal magetization.
Dr
Thomas Nunnemann
(University of Munich)
18/07/2009, 11:30
Higgs and New Physics
We report on searches for the production of scalar and vector leptoquarks in ppbar collisions at the Tevatron collider. Leptoquarks, which are predicted by several extensions of the Standard Model, are hypothetical particles carrying both lepton and quark flavors. At hadron colliders they can either be pair-produced via the strong interaction or a single leptoquark can be produced in...
Dr
Robi Peschanski
(IPhT, Saclay)
18/07/2009, 11:35
QCD at Colliders
We identify the nonlinear evolution equation in impact-parameter space for
the ``Supercritical Pomeron'' in Reggeon Field Theory as a 2-dimensional
stochastic Fisher-Kolmogorov-Petrovski-Piscounov equation. It exactly preserves
unitarity and leads in its radial form to an high energy traveling wave
solution corresponding to an ``universal'' behaviour of the impact-parameter...
Klaus Dehmelt
(DESY)
18/07/2009, 11:40
Detectors (LHC and R&D) and Accelerators
A Time Projection Chamber (TPC) is a candidate for the central tracker of the future International Linear Collider (ILC) detectors. TPCs have already demonstrated very good performance in past collider experiments. However the tracking system of the ILC should have a very good track momentum resolution (delta(1/pt) ~ 5 10**-5 /GeV/c), which is an order of magnitude more precise than in...
Dr
Robert Kaminski
(Insititute of Nuclear Physics PAN)
18/07/2009, 11:40
QCD in hadronic physics
Significant progress in description of pi-pi amplitudes has been
recently made [1,2]. We present amplitudes fitted both to well known and to newest experimental
data. In fits we use additional theoretical constraints from forward dispersion relations, sum rules
and from twice and once subtracted dispersion relations.
The latter two (so called Roy's and GKPY equations) are derived with...
Mr
Marcus Ebert
(Babar speaker)
18/07/2009, 11:45
Flavour Physics
Dr
Robert Ciesielski
(DESY)
18/07/2009, 11:45
Higgs and New Physics
A search for physics beyond the Standard Model is performed with
high-Q^2 deep inelastic scattering events recorded with
the ZEUS and H1 detectors at HERA. Complete data on scattering of polarized
electrons and positrons from HERA II running are combined with
electron and positron data from HERA I.
ZEUS limits are derived on the effective mass scale
in eeqq contact interactions, on the...
Mrs
Anna Kaminska
(Institute of Theoretical Physics, University of Warsaw)
18/07/2009, 11:50
Cosmology and Gravitational Waves
In order to properly describe inflation and particle production one has to consider the underlying theory of particles and interactions. Supersymmetry is one of the most promising extensions of the Standard Model (SM). One of the typical features of supersymmetric extensions of the SM is the presence of flat directions - directions in field space, along which the scalar potential identically...
Dr
Samuel Wallon
(Laboratoire de Physique Théorique)
18/07/2009, 11:50
QCD at Colliders
The experimental evidence for Odderon exchange processes is still weak.
In this talk, we will show that the Odderon could be observed by
interference effects with the Pomeron in charge asymmetries in the production of two pion pairs.
After discussing the theoretical framework for our calculation
based on high energy factorization and the necessary phenomenological input,
the calculation...
Mr
Pablo G. Ortega
(University of Salamanca)
18/07/2009, 11:55
QCD in hadronic physics
In the last years a number of exciting discoveries of new hadron states have
challenged our description of the hadron spectroscopy. Among the several charmonium states (X(3940), Y(3940), Z(3930)) the most
mysterious one is the well established $X(3872)$. It was first discovered by
the Belle Collaboration in the $J/\psi \pi \pi$ invariant mass spectrum of the
decay $B\rightarrow K^+...
Mr
Claudio Giganti
(CEA/Saclay)
18/07/2009, 11:55
Detectors (LHC and R&D) and Accelerators
The Tokai-to-Kamiokande (T2K) experiment is a second generation long baseline neutrino oscillation experiment which will start taking data at the end of 2009. A high intensity muon neutrino beam produced at the new JPARC proton accelerator complex at Tokai, Japan is aimed at the Super-Kamiokande detector which is 295 km away. The goals of the experiment include the precision measurement of the...
Prof.
Jen-Chi Lee
(National Chiao-Tung University)
18/07/2009, 12:00
Unified Theories, Strings, Non-perturbative QFT
We calculate high energy massive string scattering amplitudes of open bosonic string in the
Regge regime (RR). We found that the number of high energy amplitudes for each fixed mass level
in the RR is much more numerous than that of Gross regime (GR) calculated previously. Moreover,
we discover that the leading order amplitudes in the RR can be expressed in terms of the Kummer
function of...
Mr
Zhiqing Zhang
(LAL Orsay)
18/07/2009, 12:00
Higgs and New Physics
Searches for excited electrons, excited neutrinos and excited quarks are perfomed using the full $e^{\pm}p$ data sample collected by the H1 experiment at HERA, corresponding to a total luminosity of 475 pb$^{-1}$. The electroweak decays of excited fermions into standard model fernions and $\gamma$, $Z$ or $W$ bosons are considered. No evidence for excited fermion production is found. Mass...
Dr
Stefan Antusch
(MPI Munich)
18/07/2009, 12:05
Cosmology and Gravitational Waves
In supergravity, the construction of viable models of inflation is challenging
due to the so-called $\eta$-problem, which states that the flatness of the
inflaton potential is typically spoiled by supergravity corrections. We
discuss strategies to overcome this problem and how they can be applied to
classes of inflationary models. In this context, we also propose a new class
of...
Rita De Masi
(IPHC-Strasbourg)
18/07/2009, 12:10
Detectors (LHC and R&D) and Accelerators
CMOS sensors of the MIMOSA (standing for Minimum
Ionising particle MOS Active pixel sensor) series are developped
at IPHC since a decade and have ended up with full scale devices
used in beam telescopes and in demonstrators of future vertex
detectors. The sensors deliver analogue, unfiltered, signals and are
therefore limited to read-out frequencies of ~1 kframe/s. Since
a few...
Dr
Maciej Trzetrzelewski
(Jagiellonian University)
18/07/2009, 12:15
Unified Theories, Strings, Non-perturbative QFT
We explicitly construct a (unique) Spin(9)xSU(2) singlet state, involving only the fermionic degrees of freedom, corresponding to the supermembrane/M-theory matrix-model. Any ground state of the theory evaluated at the origin must be proportional to the state. (based on arXiv:0809.5270).
Dr
Tricomi Alessia
(University and INFN Catania)
18/07/2009, 12:15
QCD in hadronic physics
The LHCf detector is ready to take data at the LHC accelerator at CERN. The
whole detector has been installed at the beginning of 2008 on both side of LHC
collision point 1 (IP1) and the commissioning phase is in a well advanced stage.
Thanks to the excellent energy and position resolution of the two sampling
calorimeters, LHCf will be able to measure the pion production cross section...
Dr
Jesus Orduna
(CINVESTAV Mexico)
18/07/2009, 12:15
Flavour Physics
We report the first observation of the doubly strange b baryon Omega-_b in
the decay channel Omega-_b to J/psi Omega-, with J/psi to mu+ mu-
and Omega- to Lambda K- to (p pi-)K- in ppbar
collisions at sqrt{s} = 1.96 TeV. Using approximately 1.3 fb-1 of
data collected with the D0 detector at the Fermilab Tevatron Collider, we
observe a signal with 5.4 sigma.
Prof.
Sherwin Love
(Purdue University)
18/07/2009, 12:20
Cosmology and Gravitational Waves
A minimal candidate for non-baryonic dark matter is provided by a single standard model singlet. The quantum mechanical effects of this singlet are explored in a model where the Higgs boson has a large non-minimal coupling to the Ricci scalar and plays the role of the inflaton. Imposition of the slow roll inflation cosmological constraints restricts the allowed values of the Higgs boson mass,...
Prof.
Bernd Surrow
(MIT)
18/07/2009, 12:25
Detectors (LHC and R&D) and Accelerators
The STAR collaboration is preparing a tracking detector upgrade, the Heavy Flavor Tracker (HFT) and
the Forward GEM Tracker (FGT) to further
investigate fundamental properties of the new state of strongly interacting matter produced
in relativistic-heavy ion collisions at RHIC and to provide fundamental studies of the
proton spin structure and dynamics in high-energy polarized...
Prof.
Karlheinz Meier
(Heidelberg University), Prof.
Per OSLAND
(University of Bergen)
18/07/2009, 14:00
Dr
Christian Spiering
(DESY)
18/07/2009, 14:10
Prof.
Alain Blondel
(DPNC university of Geneva)
18/07/2009, 16:00
Prof.
John Conway
(Univ. of California, Davis)
20/07/2009, 11:00
Prof.
Charalampos Anastasiou
(ETH Zurich)
20/07/2009, 16:00
Prof.
Olaf Reimer
(Institute for Astro- and Particle Physics, University of Innsbruck and KIPAC, Stanford University)
21/07/2009, 09:30
Karl-Heinz Kampert
(University Wuppertal)
21/07/2009, 10:00
Angel Uranga
(CSIC, Madrid & CERN, Geneva)
21/07/2009, 12:00
Prof.
Karsten Danzmann
(MPI for Gravitational Physics)
21/07/2009, 14:00
Dr
Christopheer Hays
(Oxford University)
21/07/2009, 14:30
Dr
Christian Schwanenberger
(University of Manchester)
21/07/2009, 15:00
Dr
Romuald Janik
(Jagiellonian University)
22/07/2009, 09:30
Prof.
Giovanni Punzi
(Universita' and INFN-Pisa)
22/07/2009, 10:00
Dr
Adrian Bevan
(Queen Mary University of London)
22/07/2009, 11:00
Prof.
Andrzej J. Buras
(Technical University Munich)
22/07/2009, 11:45
Prof.
Andrey Golutvin
(Imperial College / ITEP / CERN)
22/07/2009, 14:30
Prof.
David Wark
(Rutherford Appleton Laboratory)
22/07/2009, 16:30
Josef Juran
(Institute of Experimental and Applied Physics, Czech Technical University in Prague)
Poster session
Facing the plethora of alternative hypotheses for the mechanism of
electroweak symmetry breaking (ESB) it is highly desirable to typify its
phenomenology using the effective Lagrangians. The BESS
(Breaking Electroweak Symmetry Strongly) model effectively describes
a Higgsless ESB mechanism accompanied by a hypothetical strong
triplet of vector resonances. The model couples the vector...
Stefan Soldner-Rembold
(University of Manchester)
Poster session
Using a novel technique we present a precise measurement of the low
transverse momentum region of Z boson production in proton-antiproton
collisions at 2 TeV centre of mass energy. The measurement is
corrected for experimental acceptance and resolution and is presented
in bins of Z boson rapidity. The full currently available D0 Run II
data set in the dielectron and dimuon channels is employed.
Dr
Alexander Schmidt
(University of Zürich)
Poster session
The CMS software contains a widespread set of algorithms to identify jets originating from the weak decay of b-quarks. Different physical properties of b-hadron decays like lifetime information, secondary vertices and soft leptons are exploited. The variety of selection algorithms range from simple and robust ones, suitable for early data-taking and online environments as the trigger system,...
Dr
Christophe Royon Royon
(IRFU-SPP, CEA Saclay)
Poster session
We present a new method to test the Standard Model expectations at the LHC
using photon-induced WW production. Both W decay in the main ATLAS or CMS
detectors while scattered protons are measured in forward detectors.
The sensitivity to anomalous WW gamma quartic and triple gauge coupling can be improved
respectively by more than three orders of magnitude or
a factor 30 compared to the...
Prof.
Di Ciaccio Anna
(University of Roma Tor Vergata and INFN)
Poster session
The large W and Z cross sections expected at the LHC allow for several measurements involving electroweak bosons already in the early data. The W and Z cross sections can be measured with good accuracy with 10-100 pb-1. These cross-sections are presently predicted with about 5% uncertainty. The ratio of W and Z cross-sections in particularis not affected by the uncertainty on the machine...
James Catmore
(Lancaster University, UK)
Flavour Physics
The LHC experiments will perform sensitive tests of physics phenomena beyond the Standard Model (BSM). Investigation of decays of beauty hadrons represents an alternative approach in addition to direct BSM searches. The ATLAS efforts concentrate on those B decays that can be selected already at the first and second trigger levels. The most favorable trigger signature will be for B hadrons...
Dr
Cheng-Chin Chiang
(National Taiwan University, department of Physics)
Dr
Panos Christakoglou
(NIKHEF - Utrecht University)
Poster session
Particle yields along with the ratios of particle production in hadronic
interactions are important indicators of the collision dynamics. In
particular, the detailed analysis of the baryon spectra as well as that of
$\bar{p}/p$ and $\bar{\Lambda}/\Lambda$ ratios are of great importance since
they allow to determine the carrier of the baryon number (BN): is the BN
carried by the...
Mr
Marcus Ebert
(Babar speaker)
Flavour Physics
269 Observation of the baryonic B-meson decay B0bar --> Lambda_c+ pbar K- pi+
287 Measurement of the Branching Fraction and Lambda polarization in B0 -> Lambdabar p pi-
Dr
Gholam Reza Boroun
(Assistant professor of physics)
Poster session
Behavior of the longitudinal structure function in the next- to- leading order of the perturbation theory at low x, based on of the exponent λg gluon
distribution and λS structure function from the Regge- like behavior at this limit is
presented. This approach shows, the longitudinal structure function has the hard-Pomeron behavior. All the results can consistently be described within the...
Prof.
Eunil Won
(Korea University)
Flavour Physics
We study the decay properties of the D_s^+ using a large data sample
collected by the Belle detector at the KEKB asymmetric energy $e^+ e^-$ collider. Measurements of the relative branching fractions of K_S pi and K_S K
states, the observation of the doubly Cabibbo-suppressed decay Ds+ -> K+K+pi- are presented, and other properties are presented.
The CDF Collaboration
(multiple institutions)
Flavour Physics
The CDFII detector at the Fermilab Tevatron has now collected more than 5 fb-1 of data, and using an impact parameter trigger has has collected the largest existing samples of D*+ -> D0pi+ , where D0 decays as D0-> h+h- (with h = K or pi). We present updated measurements of decay rates in these channels, which allow precise measurements of CP violation and flavor mixing in the charm sector.
Stefan Soldner-Rembold
(University of Manchester)
Higgs and New Physics
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 D0 detector at the Fermilab 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...
Mr
Iurii Timrov
(National Taras Shevchenko University of Kyiv)
Heavy Ions
We consider a single-particle spectrum of secondary hadrons created in
relativistic nucleus-nucleus collisions. The particles are radiated from the
system (fireball) which exhibits a sharp kinetic freeze-out: space-like and
time-like hypersurfaces separate the exited (interacting) system of particles
from its noninteracting stage of the evolution process. The standard and
widely used...
Dr
Lars Sonnenschein
(RWTH Aachen IIIA)
Prof.
Roberto Petti
(University of South Carolina, USA)
Neutrino Physics
We present new results on the neutrino-nucleon/nucleus
cross-sections using the high resolution NOMAD data.
The results include cross-section measurements of
(a) Inclusive NuMu-N charge current, (b) NuMu quasi elastic,
and (c) Coherent NuMu-Carbon neutral pion. Each measurement
is the most precise reported to date.
Dr
alessandro grelli
(Utrecht University)
Poster session
Charm and bottom quarks have been proposed as probes to study partonic matter produced in high-energy heavy-ion collisions. The detailed understanding of the production mechanisms in such collisions is of considerable interest. Measurements of the D* yield in jets probe the production processes in which the observed D* mesons are formed primarily from gluon splitting into c-cbar or b-bbar...
Prof.
Roberto Petti
(University of South Carolina, USA)
Poster session
We present an analysis of the nucleon strange sea extracted from a
global Parton Distribution Function fit including the neutrino and anti-
neutrino dimuon data by the CCFR and NuTeV collaborations, the inclusive
charged lepton-nucleon Deep Inelastic Scattering and Drell-Yan data. The
(anti-)neutrino induced dimuon analysis is constrained by the semi-
leptonic charmed-hadron branching...
Ms
Agnieszka Łuszczak
(Institut of Nuclear Physics PAN Cracow)
Poster session
Hard diffractive processes, such as the diffractive production of massive electroweak
bosons, dijets or Higgs, allow to study the interplay of small and large distance
dynamics in QCD. We present predictions for the cross sections for such processes at the LHC,
using the diffractive parton distribution from the newest analysis of diffractive HERA data
with higher twist. We calculate W and...
Prof.
Fazal Fazal-e-Aleem
(CHEP, Punjab University, Lahore-54590 Pakistan)
QCD at Colliders
Elastic scattering in the soft region poses a challenge to theoreists. TOTEM Colleboration plans to measure total and elastic scattering both in the soft and hard regions. A brief sketch of theory vs measurements is undertaken, specially with reference to QCD and eikonal picture.
Stefan Soldner-Rembold
(University of Manchester)
Poster session
We present a measurement of the difference between the masses
of the top and antitop quarks in the lepton+jets final state.
The analysis is based on the "matrix element" method. The purity
of the data sample is enhanced by applying a neural-net-based
b-tagging technique. The data for this measurement corresponds
to 1 fb-1 of integrated luminosity acquired by the D0 experiment
at the...
Dr
Fatemeh Taghavi Shahri
(IPM)
Poster session
We study the low x behavior of non-singlet spin structure Function, of the nucleon in the so-called the valon representation. We find the double logarithmic term Ln^2(1/x) in the polarized non singlet structure function at small x with using the valon model .The Structure of the valon itself develops through the perturbative dressing of a valence quark in QCD, which is independent of the...
Mr
Sabyasachi Roy
(Karimganj College, Karimganj, India.)
Poster session
Nambu-Goto string predicts the long distance quark-antiquark potential to be :
V (r) = σ r + µ +γ /r + O(1/r2).
The coefficient γ = -π(d-2)/24 is the universal Lűscher term which depends on the space-time dimension ‘d’. Recent lattice calculation of the force versus distance supports this potential for r>0 and d=3 & 4.
We use quantum mechanical Dalgerno’s method to calculate the effect of...
Piotr Lebiedowicz
(Institute of Nuclear Physics)
Poster session
We evaluate differential distributions for exclusive scalar
$f_0(1500)$ meson (glueball candidate) production for
$p \bar p \to N_1 N_2 f_0$ and $p p \to p p f_0$.
%Several mechanisms were considered, including gluonic diffractive,
Both gluon induced diffractive, pion-pion meson exchange current (MEC) components as well as
double-diffractive mechanism with intermediate pionic loop...
Mr
Wolfgang Dungel
(Institute for high energy physics, Austrian academy of Sciences)
Dr
Teh Lee Cheng
(University of Bristol)
Poster session
The top quark will be a fundamental element of the early physics program at the Large Hadron Collider (LHC). Given the complex signature of this "most exotic" of all known SM particles, the pair production of top quarks will be a crucial instrument for the commissioning the LHC experiments' tools for physics analysis. Only when the first top-quark signal has been established will the...
Dr
Benedikt Zihlmann
(Jefferson LAB)
Detectors (LHC and R&D) and Accelerators
While gluonic degrees of freedom in nucleons are well established
its counter part in mesons has not been confirmed. The properties
of the of mesons are attributed to quark degrees of freedom only.
The GlueX detector facility in Hall-D at Jefferson lab in Newport News is
part of the 12GeV upgrade and dedicated to the search for gluonic degrees
of freedom in mesons by scattering high...
Mr
Jaroslaw Wiechczynski
(Institute of Nuclear Physics PAN, Krakow)
Dr
Andrzej Rybicki
(H.Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences)
Poster session
At the Super Proton Synchrotron, measurements of final state hadron production in p-p, n-p, pion-p, p-nucleus and pion-nucleus reactions have been performed at a c.m. energy of sqrt(s)=17.3 GeV. The experimental data are characterized by an unprecedented coverage of available phase space. This includes the area 0<x_F^*<0.85 and 0<p_T<2 GeV/c, covered in a dense two-dimensional grid of double...
Prof.
Di Ciaccio Anna
(University of Roma Tor Vergata and INFN)
Poster session
ATLAS prepared a program for measurements of production cross sections both of b‐hadrons and Onia in central proton‐proton collisions at new energy 14 TeV of LHC. Dedicated triggers based on muon, di‐muon or electron signatures are designed to accommodate large statistics with already first several months. Starting from semi‐inclusive measurements for very early stage exclusive channels will...
Prof.
Di Ciaccio Anna
(University of Roma Tor Vergata and INFN)
Heavy Ions
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...
Dr
Mais Suleymanov
(COMSATS Institute of Information Technology)
Poster session
The present paper focuses on one of the possible sources of high energy cosmic particles.
In system where the temperature and density is near the QCD critical ones there is some probability that the energies of group of partons will transfer to one or to several partons as a result of nucleon collective effects (as a result of nucleons percolation for example [H.Satz. arXiv:hep-ph/0212046...
Andrea Lavagno
(Politecnico di Torino)
Poster session
We investigate the equation of state of hadronic and quark-gluon matter at finite temperature and baryon density considering the possible formation of mixed phase in relativistic heavy ion collisions. The analysis is performed by requiring the Gibbs conditions on the global conservation of baryon number, electric
charge and strangeness number. For hadronic phase, we study an extended...
Prof.
Bostjan Golob
(University of Ljubljana, Jozef Stefan Inst.)
Dr
Tara Shears
(University of Liverpool)
Poster session
We report on studies of indirect luminosity measurements, using events containing muon final states, in LHCb. The first method exploits elastic two photon dimuon production in LHCb. The process has a theoretical uncertainty of less than 1%, making it an ideal choice for use in performing an indirect luminosity measurement. Strategies for triggering, selection and background rejection are...
Stefan Soldner-Rembold
(University of Manchester)
QCD at Colliders
We present measurements of differential cross sections in
inclusive Z/gamma plus jet production in a data sample of
1fb-1 collected with the D0 detector in proton antiproton
collisions at sqrt(s)=1.96TeV. Measured variables include
the Z/gamma transverse momentum (pT-Z), and rapidity (y-Z),
the leading jet pT (pT-jet), and rapidity (y-jet), as well
as various angles of the Z+jet...
Stefan Soldner-Rembold
(University of Manchester)
QCD at Colliders
First measurements of the differential cross sections for the inclusive
production of a photon in association with a heavy quark (c, b) jet are
presented, 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. The results are based on an
integrated luminosity of 1 fb-1 in ppbar...
Dr
Cristina Lazzeroni
(University of Birmingham, UK)
Poster session
We report on measurements of the rare decays K+- -> pi+- e+ e- and K+- -> pi+- mu+ mu-. The full NA48/2 data set was analyzed, leading to more than 7200 reconstructed events in the electronic and more than 3000 events in the muonic channel, the latter exceeding the total existing statistics by a factor of five. For both channels the selected events are almost background-free. From these...
Collaboration CDF
(Fermilab)
Poster session
A method of reconstructing t-tbar events in the lepton plus jets mode is applied to a measurement of the forward backward asymmetry in t- tbar pair production at CDF. The measurement is a test of discrete symmetries in t-tbar production and strong interactions at large Q^2. In the present data set it is potentially sensitive to the presence of parity-violating production channels such as a...
Prof.
Grzegorz Wilk
(The Andrzej Soltan Institute for Nuclear Studies, Warsaw, Poland)
Poster session
Recently experiments in high-energy nuclear collisions have observed fluctuations of multiplicity which exhibit spectacular and unexpected features as functions of the number of participants (in particular they show that the scaled variance of the multiplicity distribution, Var(N)/<N>, increases when proceeding from the central towards peripheral collisions, i.e., when the number of...
Dr
Bernardo Resende
(Nikhef - Amsterdam)
Poster session
In the midst of the intense activity that will arise from the proton-proton collisions at the LHC, muons will be very useful to spot rare events of interest. The good resolution expected for their momentum measurement shall also make them powerful tools in event reconstruction. Muon identification will thus be a crucial issue in the ATLAS experiment at the LHC. Their charged tracks can be...
Alexey Zhemchugov
(Joint Institute for Nuclear Research)
Poster session
The so-called 'LSND anomaly', a 3.8 \sigma excess of \nuebar events, resulted in many theoretical speculations. The interpretation by the LSND authors that the anomaly originates from \numubar->\nuebar oscillation, is inconsistent with the recent findings of the MiniBooNE Collaboration. We present a critical assessment of the prediction of the neutrino fluxes that were used in the analysis of...
Mr
Folkert Koetsveld
(Nikhef/Radboud University)
Poster session
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 on such data-driven techniques, and prospects for their application on first data.
Mrs
Marta Luszczak
(Rzeszow University)
Poster session
Recently the PHENIX and STAR collaborations at RHIC have measured transverse momentum distribution of so-called nonphotonic electrons.
They have measured the total charm and bottom production cross-section for p+p and Au+Au
collisions at 200 GeV. The dominant contribution to the nonphotonic electrons/positrons comes from the semileptonic decays of charm and beauty mesons.
In the first step...
Mrs
Katarzyna Malek
(Center for Theoretical Physics PAS, Poland)
Poster session
AKARI is the first satellite dedicated to survey the entire sky in near-, mid- and far- infrared wavelenghts at the same time with un unpecedented agular resolution to investigate the evolution of star-forming galaxies, the large-scale structure of the Universe, and the cosmic infrared background radiation.
Our main goal is to identify the detected sources from the AKARI Deep Field South...
Dr
Alinaghi Khorramian
(IPM and Semnan University)
Poster session
We present the results of our QCD analysis for nonsinglet
unpolarized quark distributions and structure function
F_2(x,Q^2) up to NNNLO using the Pade approximation. New parameterizations are derived for the
nonsinglet quark distributions for the kinematic wide range of x
and Q^2. The analysis is based on the Jacobi polynomials
expansion of the structure function. The higher...
Prof.
Wojciech Broniowski
(IFJ PAN/UJK)
Poster session
Parton transversity distribution in the pion is calculated in the framework of chiral quark models. The results for the corresponding form factors are compared to the recent data from lattice QCD and agreement is found. It shows, together with the previous predictions of these models for such quantities as the parton distribution function, distribution amplitudes, generalized parton...
Dr
Pavel Weber
(University of Heidelberg)
Poster session
The measurement of the missing transverse momentum in events produced in proton- proton collisions is an important ingredient in the physics program of LHC. In 2008 the Atlas detector has been operated to commission and integrate the individual sub-detectors and a large data-set of millions of events has been recorded. It has been shown that the noise in more than 200000 cells in the ATLAS...
Ms
Elina Berglund
(Unversity of Geneva)
Poster session
The understanding of the reconstruction of photons will be one of the key issues at the start-up of data-taking with the ATLAS experiment at the LHC in 2009. Large statistics of photons produced in association with jets are expected over a wide range of ET, from 20 GeV to several hundred GeV. These will be used as an important in situ calibration tool for the jet energy scale.
The energy...
Mr
Tomasz Palczewski
(Soltan Institute for Nuclear Studies, Warsaw, Poland.)
Poster session
Tomasz Jan Palczewski, for the NA61 Collaboration:
In this talk I will present preliminary results from a fixed target experiment NA61/SHINE at the CERN SPS. One of physics goals of the NA61 experiment is a measurement of hadron production cross sections from proton-Carbon interactions at 31GeV/c for the T2K experiment at J-PARC. A better knowledge of differential cross sections for pion...
Dr
Cristina Lazzeroni
(University of Birmingham, UK)
Poster session
We report our final result on the measurement of direct photon emission
(DE) in the decay K+- -> pi+- pi0 gamma and its interference (INT) with
the inner bremsstrahlung amplitude. For this measurement the full NA48/2
data set with about 600k reconstructed K+- -> pi+- pi0 gamma decays was
analyzed, which is factor of 30 larger than for previous experiments and
a factor of three w.r.t. our...
Dr
Victor Egorychev
(ITEP)
Unified Theories, Strings, Non-perturbative QFT
We report on studies of low invariant mass Drell-Yan production in the LHCb experiment. Measurements of the Drell-Yan differential cross- section can probe values of x down to 10^-5. Strategies for triggering, selection, and background reduction are discussed. Estimated statistical and systematic errors are given as a function of Drell-Yan invariant mass. The sensitivity to uncertainties in...
Collaboration CDF
(Fermilab)
Poster session
More than a decade after its discovery we are still trying to find out more about the nature of the top quark. The current statistics of the Tevatron allow us to make stringent tests. In this talk we will present state of the art measurements of top quark properties. By studying rates and distributions sensitive to the production and decay mechanisms of top quarks, we can search for...
Emily Thompson
(University of Massachusetts, Amherst)
Poster session
Final states with high pT leptons and jets, without missing energy, are predicted by several BSM models at the LHC, including LR symmetric models and Leptoquarks.
The prospects for an early discovery of particles predicted by these models, using the ATLAS experiment, are discussed. These particles include in particular first and second generation leptoquarks, right-handed W and heavy neutrinos.
Prof.
Di Ciaccio Anna
(University of Roma Tor Vergata and INFN)
Poster session
We present searches for generic SUSY models with R-parity conservation in the ATLAS detector at the LHC, based on signatures including missing transverse momentum from undetected neutralinos, multiple jets and leptons or b and tau jets. We show the corresponding discovery reach for early ATLAS data, including the effect of systematic uncertainties on the background estimate.
Dr
Maurizio Bonesini
(Sezione INFN Milano Bicocca)
Poster session
This talk will review the current R&D effort towards new neutrino
beams at accelerators, both superbeams and neutrino factory.
After a brief introduction on the physics reach, as compared to other
ongoing projects, the critical R&D issues of targetry and muon cooling
will be discussed.
Dr
María Pilar Casado Lechuga
(IFAE/UAB)
Poster session
The scope of the ATLAS tau trigger system at the LHC is most ambitious.
It aims at reconstructing in real time, a matter of seconds, a
detailed picture of the high energy proton proton collisions at the
LHC. Such system is mandatory in order to select efficiently data needed
for discovery of new physics in a proton proton collision environment
where the rates of jets observed in the...
Mr
Michail Bachtis
(University of Wisconsin)
Poster session
Taus provide an excellent probe of possible new physics beyond the Standard Model and their identification at the LHC is an important part of the CMS physics program. This talk reports on the strategies to trigger, reconstruct, and identify hadronic decays of taus during the early running of the LHC (tens of inverse picobarns of data), preparing the way for searches involving taus at a few...
Stefan Soldner-Rembold
(University of Manchester)
Poster session
We report on a new search for charged massive stable particles
(CMSPs) at the D0 Experiment at the Fermilab Tevatron collider.
These electrically charged particles have sufficiently long lifetimes
to penetrate through the entire D0 detector before decaying. CMSPs
are predicted in many theories beyond the Standard Model. We
use time-of-flight information to search for pair-produced...
Dr
Monica D'Onofrio
(Institut de Fisica d'Altes Energies (IFAE), Barcelona)
Poster session
Using data collected at the CDF detector in Run II at the Tevatron we present a search for pair production of heavy down-type quarks, each of which decay to a top quark and a W boson yielding a b+bbar+W+W+W+W final state. The mode in which two same-charge leptons are produced is very sensitive because while the signal branching ratio is reasonable, same-charge dilepton events are rare in the...
Malgorzata Kazana
(CMS group)
Poster session
New studies of the CMS collaboration are presented on the sensitivity to searches for Heavy Stable Charged Particles (HCSPs). Such particles appear for example in particular SUSY and extra dimension models. Making use of the redundancy of the CMS experiment to measure the velocity of such heavy particles while traversing the detector, excellent prospects for the discovery of these particles...
Stefan Soldner-Rembold
(University of Manchester)
Poster session
We present results of searches for unique experimental signatures
that might arise from a hidden sector extension (hidden valley)
of the standard model. Reduced couplings to the hidden sector
can result in long-lived particle decays that result in
highly displaced vertices from di-leptons or di-jets.
By searching for such signatures, D0 extends
its discovery potential into...
Dr
Monica D'Onofrio
(Institut de Fisica d'Altes Energies (IFAE), Barcelona)
Poster session
In models of maximal flavor violation (MxFV) there is at least one new scalar $\Phi_{FV}$ which couples to the quarks via $\Phi_{FV} q_i q_j \propto \xi_{ij}$ where $\xi_{i3},\xi_{3i} \sim V_{tb}$ for $i = 1,2$ and $\xi_{33} \sim V_{td}$ and $V$ is the CKM matrix. We study MxFV signals of same-sign leptons from same-sign top-quark pair production at CDF. We search for a pair of same-sign...
Dr
Antonio Policicchio Policicchio
(University of Washington, Seattle (WA), USA)
Poster session
Various models of new physics, including hidden valley models and some supersymmetric models, predict the existence of long lived particles decaying a significant distance away from
the interaction point, or even leaving the detector undecayed.
We present ATLAS strategies to improve triggering and reconstruction of these events, and discuss prospects for searches in early LHC data.
Dr
Agnieszka Majczyna
(The Andrzej Sołtan Institute for Nuclear Studies)
Poster session
"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. Due to on-line data...
Yuan Chao
(National Taiwan University)
Poster session
It is still a mystery why the Standard Model as we know it has three families. At new high energy colliders it is worthwhile to search for a new additional family -- which obviously would have a heavy neutrino to avoid the LEP bounds. This presentation discusses new studies made with the CMS detector for the search of new heavy b-like quarks in several different decay modes and for different...
Natascha Hoermann
(CMS group)
Poster session
If supersymmetry would manifest itself at a low mass scale it might be found already in the early phase of the LHC operation. Generic signatures for supersymmetry in pp-collisions consist of high jet multiplicity, large missing transverse energy (MET) as well as leptons in the final state. The presence of charged leptons makes these signature more robust and therefore facilitates their...
Dr
David Milstead
(Stockholm University)
Poster session
The search for stable exotic hadrons is a promising way to observe new physics
processes at collider experiments. For example, R-hadrons are predicted in a number of
supersymmetry scenarios such as split-supersymmetry and gauge-mediated supersymmetry
breaking. The discovery potential for such particles can be enhanced or severely
suppressed by their interactions with matter as they pass...
Mr
Piotr Kotko
(Jagiellonian University)
Poster session
In presence of the hard scale amplitudes for high energy processes factorize into perturbative and soft part. While the former can be calculated within QCD, the latter has to be either obtained from experiment or treated by non-perturbative methods. One of the possibilities is to use low energy effective models, which incorporate dynamical chiral symmetry breaking, as a one of the most...
Dr
Mariam Tórtola
(Universität Hamburg)
Neutrino Physics
The presence of neutrino oscillations in the solar neutrino flux is
nowadays a fact supported by all the existing solar neutrino
experiments and unambiguously confirmed by the reactor experiment
KamLAND. In this talk we will review the current status of the solar
neutrino parameter determination after the latest results from the
Sudbury and Borexino solar experiments. We will also discuss...
Dr
Alex Bernardini
(Universidade Federal de São Carlos - UFSCAR)
Poster session
A perturbative approach for arbitrary choices of the equation of state of the universe is introduced in order to treat scenarios for mass varying neutrinos (MaVaN's) coupled to the dark sector.
The generalized criterion for the applicability of such an approach is expressed through a constraint on the coefficient of the linear perturbation on the dark sector scalar field.
This coefficient...
Dr
Ken Sakashita
(HIGH ENERGY ACCELERATOR RESEARCH ORGANIZATION, KEK)
Neutrino Physics
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...
Dr
Alex Bernardini
(Universidade Federal de São Carlos - UFSCAR)
Poster session
The theoretical conception of compact structures that share the key features of mass varying mechanisms provides by itself the conditions for establishing the equilibrium and stability of stellar massive objects.
We investigate static, spherically symmetric solutions of Einstein equations for a fluid of mass varying particles of non-baryonic matter (neutrinos or dark matter) which forms...
Dr
Marek Kowalski
(Institute of Nuclear Physics, Cracow, Poland)
Poster session
It is now generally accepted that heavy ion collisions at ultra relativistic
energies result in a fireball of matter with high density and temperature. Such
conditions prevail, when the incoming nucleons deposit enough of their kinetic
energy in the reaction zone. Little is known about this stopping process and
about possible differences between the stopping of the incident nucleons in...
Jason Keller
(University of Nebraska-Lincoln)
Poster session
The CMS Collaboration is studying several algorithm to discriminate jets coming from the hadronization of b quarks from the lighter background. These will be used to identify top quarks and in searches of the Higgs boson and non-Standard Model processes. A reliable estimate of the performance of these algorithms is therefore crucial, and methods to estimate efficiencies and mistag rates...
Dr
Victor Egorychev
(ITEP)
Unified Theories, Strings, Non-perturbative QFT
We report on studies of W 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-section to uncertainties in parton density functions is discussed
Dr
Victor Egorychev
(ITEP)
Unified Theories, Strings, Non-perturbative QFT
We report on studies of 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 section to uncertainties in parton density functions is discussed.
Monica Turcato ZEUS Collaboration
(Hamburg University)
Poster session
A search for events containing two high-transverse-momentum tau leptons
has been performed with the ZEUS detector at HERA, using the data sample
collected between 2004 and 2007, corresponding to 0.36 fb^-1. At least
one of the tau candidates is required to decay hadronically, while the
second tau is required to decay either in an electron or in hadrons. The
number of observed tau...
Mr
Chih-Ching Chen
(Physics Deps.,National Taiwan University)
Poster session
The ultra-high energy neutrinos play one of the most important acts in astroparticle physics. There are many experiments on going and proposed to detect them. We study the radio/acustic signal from UHE neutrino induce particle showers by using ab initio method in time domain. Our study can provide general rule for radio/acustic detector design and deploy.
Dr
Irina Nasteva
(University of Manchester)
Poster session
The SuperNEMO experiment is being designed to search for neutrinoless double beta decay to test if neutrinos are Majorana particles. The experimental technique follows that of the currently running NEMO-3 experiment, which successfully combines tracking and calorimetry to measure the topology and energy of the final state electrons. Unique particle identification capabilities of SuperNEMO ...
Prof.
Roger Jones
(Lancaster University)
Poster session
The ATLAS computing model was constructed to exploit the opportunities of the Grid in handling the large volumes of data from the Large Hadron Collider and to allow easy and relatively local access to data for all of its collaborators worldwide. Despite delays with collision data, the model has now been tested with beam-related and cosmic ray data, and much has been learned. The model has...
Dr
Ana M. Teixeira
(CFTP - IST)
Higgs and New Physics
We briefly motivate the next-to-minimal supersymmetric extension of the Standard Model (NMSSM). In the NMSSM, a richer Higgs and neutralino spectrum allow for many interesting phenomena that are not present in the minimal supersymmetric extension of the Standard Model.
We propose a supergravity inspired version of the NMSSM (cNMSSM). After considering the different constraints on the...
Jason Lee
(University of Sydney)
Poster session
The ATLAS inner detector will see of the order of 1000 charged particle tracks for every beam crossing at the design luminosity of the CERN Large Hadron Collider (LHC).
This talk summarizes the design of the detector and outlines the reconstruction software.
The expected performance for reconstructing single particles is presented, along with an indication of the vertexing capabilities.
The...
Prof.
Mustapha MEKHFI
(Université Oran Es senia Oran Algeria)
Poster session
We re express the fermion probability amplitude as a trace over spinor indices; this reformulation puts the probability amplitude and the probability on equal footing at the computation level. We test the power of the trace formula in two applications: The calculation of the fermion charge-current using a symbolic program and the analytic computation by hand of the quark dipole magnetic moment.
Andras Agocs
(MTA KFKI-RMKI)
QCD at Colliders
Jet matter interaction remains a central question and a theoretical challenge in heavy-ion physics and might become important in high-multiplicity events in proton-proton collisions at top LHC energies. Full jet measurements at LHC are hoped to reconstruct the complete energy loss process and fragmentation of the hard parton in the medium. Since, jet reconstruction will be constrained to small...
Mr
Martin Vojik
(student)
Poster session
Processes in which the a1 resonance either dominates (τ − → π − π + π − ντ ,
K+ → π + l+ l− , e+ e− → 4π) is supposed to play an important role (photon and
dilepton production from a meson gas) are linked together using the meson dominance
(MD) hypotestis. The mixing angle of a two-part a1 ρπ - Lagrangian is first fixed to-
gether with the mass and width in the a1...
Mr
antoine Marzin
(CEA-Saclay)
Standard Model Electroweak Physics
The LHC will be the first top quark factory. ttbar pairs will be produced at such a high rate that the statistical error on the top quark mass measurement will soon become negligible.
A precise top quark mass measurement is of great importance for LHC experiments because it is one of the fundamental parameters of the Standard Model and because, during the LHC start-up, it will be a high mass...
Duc Bao Ta Ta
(Universität Bonn)
Poster session
An accurate determination of the top quark pair production cross section at the LHC provides a valuable measurement of the Standard Model. Given the high statistics which will be available,
this check can be performed relatively fast after the turn on of the LHC. The prospects for measuring the total top quark pair cross section with the ATLAS detector during the initial period of LHC...
Dr
Apostolos Skouroupathis
(University of Cyprus, Department of Physics)
Poster session
We compute the two-loop renormalization functions, in the RI' scheme, of local bilinear quark operators (ψbar Γ ψ), where Γ corresponds to the Vector, Axial-Vector and Tensor Dirac operators, in the lattice formulation of QCD. We consider both the flavor nonsinglet and singlet operators.
We use the clover action for fermions and the Wilson action for gluons. Our results are given as a...
Dr
Fei-Fan Lee
(Department of Physics, National Taiwan University, Taipei 106, Taiwan.)
Poster session
We extend the so-called “eV seesaw” scenario, where M_R is of eV order, to four lepton generations. The fourth generation gives a heavy pseudo-Dirac neutral lepton, which largely decouples from other generations and is relatively stable. The framework naturally gives 3 active and 3 sterile neutrinos. We update a previous numerical analysis of a 3+3 study of the LSND anomaly, taking into...
Tobias Winchen
(III. Physikalisches Institut A, RWTH Aachen University, Germany)
Poster session
Modern physics analysis is an iterative task consisting of prototyping,
executing and verifying the analysis procedure. For supporting
scientists in each step of this process, we developed VISPA: a toolkit
based on graphical and textual elements for visual physics analysis.
Unlike many other analysis frameworks VISPA runs on Linux, Windows and
Mac OS X.
VISPA can be used in any...
Collaboration The KLOE
(Laboratori Nazionali di Frascati - INFN)
Flavour Physics
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...
Dr
Larry Nodulman
(Argonne National Lab.)
Standard Model Electroweak Physics
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.
Prof.
Di Ciaccio Anna
(University of Roma Tor Vergata and INFN)
Standard Model Electroweak Physics
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...
