Electron and photon reconstruction and identification with the CMS experiment at the CERN LHC
File(s)
Published version
Author(s)
Type
Journal Article
Abstract
The performance is presented of the reconstruction and identification algorithms for electrons and photons with the CMS experiment at the LHC. The reported results are based on proton-proton collision data collected at a center-of-mass energy of 13 TeV and recorded in 2016–2018, corresponding to an integrated luminosity of 136 fb^-1. Results obtained from lead-lead collision data collected at √(sNN)=5.02 TeV are also presented. Innovative techniques are used to reconstruct the electron and photon signals in the detector and to optimize the energy resolution. Events with electrons and photons in the final state are used to measure the energy resolution and energy scale uncertainty in the recorded events. The measured energy resolution for electrons produced in Z boson decays in proton-proton collision data ranges from 2 to 5%, depending on electron pseudorapidity and energy loss through bremsstrahlung in the detector material. The energy scale in the same range of energies is measured with an uncertainty smaller than 0.1 (0.3)% in the barrel (endcap) region in proton-proton collisions and better than 1 (3)% in the barrel (endcap) region in heavy ion collisions. The timing resolution for electrons from Z boson decays with the full 2016–2018 proton-proton collision data set is measured to be 200 ps.
Date Issued
2021-05-01
Date Acceptance
2021-03-02
Citation
Journal of Instrumentation, 2021, 16 (5), pp.1-82
ISSN
1748-0221
Publisher
IOP Publishing
Start Page
1
End Page
82
Journal / Book Title
Journal of Instrumentation
Volume
16
Issue
5
Copyright Statement
© 2021 CERN for the benefit of the CMS collaboration. Published by
IOP Publishing Ltd on behalf of Sissa Medialab. Original content from
this work may be used under the terms of the Creative Commons Attribution 4.0 licence.
Any further distribution of this work must maintain attribution to the author(s) and the
title of the work, journal citation and DOI.
IOP Publishing Ltd on behalf of Sissa Medialab. Original content from
this work may be used under the terms of the Creative Commons Attribution 4.0 licence.
Any further distribution of this work must maintain attribution to the author(s) and the
title of the work, journal citation and DOI.
License URL
Identifier
http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000677883500002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
Subjects
Science & Technology
Technology
Instruments & Instrumentation
Large detector systems for particle and astroparticle physics
Particle identification methods
QUARK-GLUON PLASMA
PERSPECTIVE
Publication Status
Published
Article Number
ARTN P05014
Date Publish Online
2021-05-13