Electron and photon energy calibration with the ATLAS detector using 2015-2016 LHC proton-proton collision data

The ATLAS collaboration

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Abstract

This paper presents the electron and photon energy calibration obtained with the ATLAS detector using about 36 fb-1 of LHC proton-proton collision data recorded at √s = 13 TeV in 2015 and 2016. The different calibration steps applied to the data and the optimization of the reconstruction of electron and photon energies are discussed. The absolute energy scale is set using a large sample of Z boson decays into electron-positron pairs. The systematic uncertainty in the energy scale calibration varies between 0.03% to 0.2% in most of the detector acceptance for electrons with transverse momentum close to 45 GeV . For electrons with transverse momentum of 10 GeV the typical uncertainty is 0.3% to 0.8% and it varies between 0.25% and 1% for photons with transverse momentum around 60 GeV . Validations of the energy calibration with J/ψe+e- decays and radiative Z boson decays are also presented.

Original languageEnglish
Article numberP03017
Pages (from-to)1-58
Number of pages60
JournalJournal of Instrumentation
Volume14
Issue number3
DOIs
Publication statusPublished - Mar 2019
Externally publishedYes

Bibliographical note

Copyright the Author(s) 2019. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

  • Calorimeter methods
  • Pattern recognition
  • cluster finding
  • calibration and fitting methods
  • Performance of High Energy Physics Detectors

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