8-13 August 2011
Rhode Island Convention Center
US/Eastern timezone

Performance of the CMS Electromagnetic Calorimeter at the LHC

10 Aug 2011, 17:05
556 (Rhode Island Convention Center)


Rhode Island Convention Center

Parallel contribution Detector Technology and R&D Detector Technology and R&D


Marco Grassi (Universita di Roma I 'La Sapienza'-Universita e INFN, Roma I)


The CMS Electromagnetic Calorimeter (ECAL) is a high resolution, fine grained calorimeter devised to measure photons and electrons at the LHC. Built of lead tungstate crystals, it plays a crucial role in the search for new physics as well as in precision measurements of the Standard Model. A pre-shower detector composed of sandwiches of lead and silicon strips improves pi-0/gamma separation in the forward region. The operation and performance of the ECAL during the 2010 run at the LHC, with pp collisions at √s = 7 TeV will be reviewed, and to some extent for the 2011 running as well. Pure samples of electrons and photons from decays of known resonances have been exploited to improve and verify the trigger efficiency, the reconstruction algorithms, the detector calibration and stability, and the particle identification efficiency. A review of these aspects will be given.

Primary author

Marco Grassi (Universita di Roma I 'La Sapienza'-Universita e INFN, Roma I)

Presentation Materials