This paper describes the reconstruction of electrons and photons with the ATLAS detector, employed for measurements and searches exploiting the complete LHC Run 2 dataset. An improved energy clustering algorithm is introduced, and its implications for the measurement and identification of prompt electrons and photons are discussed in detail. Corrections and calibrations that affect performance, including energy calibration, identification and isolation efficiencies, and the measurement of the charge of reconstructed electron candidates are determined using up to 81 fb-1 of proton-proton collision data collected at √s = 13 TeV between 2015 and 2017.

Original languageEnglish
Article numberP12006
Number of pages69
JournalJournal of Instrumentation
Issue number12
Publication statusPublished - 10 Dec 2019


  • Particle identification methods
  • Performance of high energy physics detectors
  • Performance of High Energy Physics Detectors

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