Energy calibration and resolution of the CMS electromagnetic calorimeter in pp collisions at √s = 7 TeV

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dc.citation.firstpageP09009en_US
dc.citation.journalTitleJournal of Instrumentationen_US
dc.citation.volumeNumber8en_US
dc.contributor.authorAdair, A.en_US
dc.contributor.authorAkgun, B.en_US
dc.contributor.authorEcklund, K.M.en_US
dc.contributor.authorGeurts, F.J.M.en_US
dc.contributor.authorLi, W.en_US
dc.contributor.authorPadley, B.P.en_US
dc.contributor.authorRedjimi, R.en_US
dc.contributor.authorRoberts, J.en_US
dc.contributor.authorZabel, J.en_US
dc.date.accessioned2015-07-14T16:10:35Zen_US
dc.date.available2015-07-14T16:10:35Zen_US
dc.date.issued2013en_US
dc.description.abstractThe energy calibration and resolution of the electromagnetic calorimeter (ECAL) of the CMS detector have been determined using proton-proton collision data from LHC operation in 2010 and 2011 at a centre-of-mass energy of √s = 7 TeV with integrated luminosities of about 5\fbinv. Crucial aspects of detector operation, such as the environmental stability, alignment, and synchronization, are presented. The in-situ calibration procedures are discussed in detail and include the maintenance of the calibration in the challenging radiation environment inside the CMS detector. The energy resolution for electrons from Z-boson decays is better than 2% in the central region of the ECAL barrel (for pseudorapidity |η| < 0.8) and is 2–5% elsewhere. The derived energy resolution for photons from 125 GeV Higgs boson decays varies across the barrel from 1.1% to 2.6% and from 2.2% to 5% in the endcaps. The calibration of the absolute energy is determined from Z→e+e− decays to a precision of 0.4% in the barrel and 0.8% in the endcaps.en_US
dc.identifier.citationAdair, A., Akgun, B., Ecklund, K.M., et al.. "Energy calibration and resolution of the CMS electromagnetic calorimeter in pp collisions at √s = 7 TeV." <i>Journal of Instrumentation,</i> 8, (2013) IOP Publishing: P09009. http://dx.doi.org/10.1088/1748-0221/8/09/P09009.en_US
dc.identifier.doihttp://dx.doi.org/10.1088/1748-0221/8/09/P09009en_US
dc.identifier.urihttps://hdl.handle.net/1911/80962en_US
dc.language.isoengen_US
dc.publisherIOP Publishingen_US
dc.rightsThis is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.en_US
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/en_US
dc.titleEnergy calibration and resolution of the CMS electromagnetic calorimeter in pp collisions at √s = 7 TeVen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpublisher versionen_US
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