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

Journal article

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 fb−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.

Authors: Aad, G; Abbott, B; Abeling, K; Abicht, NJ; Abidi, SH

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Springer
• Journal: Journal of High Energy Physics
• Volume: 2024
• Issue: 5
• Article number: 162
• Publication date: 2024-05-14
• Acceptance date: 2024-04-17
• DOI: 10.1007/jhep05(2024)162
• EISSN: 1029-8479
• Language: English
• Keywords: Hadron-Hadron Scattering