Electron and photon efficiencies in LHC Run 2 with the ATLAS experiment
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,...
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| Format: | Article |
| Status: | Published version |
| Publication date: | 2024 |
| Country: | Chile |
| Institution: | Pontificia Universidad Católica de Chile |
| Repository: | Pontificia Universidad Católica de Chile |
| OAI Identifier: | oai:repositorio.uc.cl:11534/86409 |
| Online Access: | https://doi.org/10.1007/JHEP05(2024)162 https://repositorio.uc.cl/handle/11534/86409 |
| Access Level: | Open access |
| Keyword: | Hadron-Hadron Scattering 510 Matemática física y química 07 Affordable and clean energy 07 Energía asequible y no contaminante |
| Summary: | 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. |
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