Electron and photon efficiencies in LHC Run 2 with the ATLAS experiment

Collaboration
Aug 25, 2023
65 pages
Published in:
  • JHEP 05 (2024) 162
  • Published: May 14, 2024
e-Print:
DOI:
Report number:
  • CERN-EP-2023-182
Experiments:

Citations per year

2023202420259572
Abstract: (Springer)
Precision measurements of electron reconstruction, identification, and isolation efficiencies and photon identification efficiencies are presented. They use the full Run 2 data sample collected by the ATLAS experiment in pp collisions at a centre-of-mass energy of 13 TeV during the years 2015–2018, corresponding to an integrated luminosity of 139 fb1^{−1}. The measured electron identification efficiencies have uncertainties that are around 30%–50% smaller than the previous Run 2 results due to an improved methodology and the inclusion of more data. A better pile-up subtraction method leads to electron isolation efficiencies that are more independent of the amount of pile-up activity. Updated photon identification efficiencies are also presented, using the full Run 2 data. When compared to the previous measurement, a 30%–40% smaller uncertainty is observed on the photon identification efficiencies, thanks to the increased amount of available data.[graphic not available: see fulltext]
Note:
  • Hadron-Hadron Scattering
  • p p: colliding beams
  • photon: particle identification
  • p p: scattering
  • particle identification: efficiency
  • electron: particle identification
  • pile-up
  • ATLAS
  • CERN LHC Coll
  • data analysis method