CMS-PAS EGM-11-001
ECAL performance and electromagnetic objects reconstruction in CMS

Abstract: The CMS electromagnetic calorimeter (ECAL) has been operating in different data taking conditions since its full integration in the 2008. This paper describes how the proton-proton collision data at sqrt s = 7 TeV center-of-mass energy recorded in the year 2010 have been used to improve and assess the calorimeter performance. Signals from pure samples of electrons and photons are used as a benchmark: in the paper the algorithms used for reconstruction and selection of the electromagnetic objects in CMS are presented together with their performance. Previous results reported by the CMS collaboration on the commissioning and performance of the electromagnetic calorimeter using cosmic rays data and first LHC beam splash events are extended in this paper.

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Topic revision: r1 - 2013-09-23 - ToyokoOrimoto
 
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