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

Georges Aad, Braden Keim Abbott, Kira Abeling, Nils Julius Abicht, Haider Abidi, Asmaa Aboulhorma, Halina Abramowicz, Henso Abreu, Yiming Abulaiti, Bobby Samir Acharya, …
Deutsches Elektronen-Synchrotron, DESY, Hamburg
2023
DOI: https://doi.org/10.3204/pubdb-2023-07889

摘要

CERN LHC Coll data analysis method electron: particle identification experimental results GeV-cms p p: colliding beams p p: scattering particle identification: efficiency photon: particle identification pile-up
Precision measurements of electron reconstruction, identification, and isolation efficiencies and photon identification efficiencies are presented. They use the full Run 2 data of $pp$ collisions at a centre-of-mass energy of 13 TeV, corresponding to an integrated luminosity of 139 $\mathrm{fb}^{-1}$ collected by the ATLAS experiment during the years 2015-2018. 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.

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