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

Please use this identifier to cite or link to this item: https://ir.lib.ncu.edu.tw/handle/987654321/104578

Title:	Energy calibration and resolution of the CMS electromagnetic calorimeter in pp collisions at √s = 7 TeV
Authors:	余欣珊;Chatrchyan, Serguei
Contributors:	理學院物理學系
Keywords:	Calibration;Collisions;Decay;Detectors;Energy resolution;Energy use;Higgs bosons;Instrumentation;Solenoids
Date:	2013-09-01
Issue Date:	2026-04-23 11:52:58 (UTC+8)
Publisher:	IOP Publishing Ltd.;United States
Abstract:	摘要： The 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 [radical]s = 7 TeV with integrated luminosities of about 5 fb super(-1). 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 \|[eta]\| < 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 arrow right e super(+)e super(-) decays to a precision of 0.4% in the barrel and 0.8% in the endcaps. 出版者： United States 出版日期： 2013-09-01 出處： Journal of instrumentation, 2013-09, Vol.8 (9), p.P09009-P09009 資源來源： Institute of Physics Journals 識別號： ISSN: 1748-0221 識別號： EISSN: 1748-0221 識別號： DOI: 10.1088/1748-0221/8/09/P09009
Appears in Collections:	[Department of Physics] journal & Dissertation

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