The 2009 Europhysics Conference on High Energy Physics

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...

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...

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...

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...

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...

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...

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...

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...

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...

The impressive performance of current (KEKB) and recent (PEP-II) B-Factory colliders has increased interest in developing even higher luminosity B-factories. Two new designs are being developed (SuperKEKB and SuperB) which plan to deliver luminosity in the range of 1x10^36 cm-2s-1, nearly 100 times the present B-factory level. Achieving this high luminosity requires either high beam currents...

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...

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...

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.

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...