Measurement of the photon identification efficiencies with the ATLAS detector using LHC Run 2 data collected in 2015 and 2016

0521091 - FZÚ 2020 RIV DE eng J - Journal Article
Aaboud, M. - Aad, G. - Abbott, B. - Chudoba, Jiří - Hejbal, Jiří - Hladík, Ondřej - Jačka, Petr - Jakoubek, Tomáš - Kepka, Oldřich - Kroll, Jiří - Kupčo, Alexander - Lokajíček, Miloš - Lysák, Roman - Marčišovský, Michal - Mikeštíková, Marcela - Němeček, Stanislav - Penc, Ondřej - Šícho, Petr - Staroba, Pavel - Svatoš, Michal - Taševský, Marek … Total 2921 authors
Measurement of the photon identification efficiencies with the ATLAS detector using LHC Run 2 data collected in 2015 and 2016.
European Physical Journal C. Roč. 79, č. 3 (2019), s. 1-41, č. článku 205. ISSN 1434-6044. E-ISSN 1434-6052
Research Infrastructure: CERN-CZ - 90058
Institutional support: RVO:68378271
Keywords : ATLAS * CERN LHC Coll * experimental results * longitudinal * numerical calculations: Monte Carlo * Z0 --> muon+ muon- photon * electron * 13000 GeV-cms
OECD category: Particles and field physics
Impact factor: 4.389, year: 2019
Method of publishing: Open access

The efficiency of the photon identification criteria in the ATLAS detector is measured using 36.1 fb1 to 36.7 fb1 of pp collision data at s√=13 TeV collected in 2015 and 2016. The efficiencies are measured separately for converted and unconverted isolated photons, in four different pseudorapidity regions, for transverse momenta between 10 GeV and 1.5 TeV. The results from the combination of three data-driven techniques are compared with the predictions from simulation after correcting the variables describing the shape of electromagnetic showers in simulation for the average differences observed relative to data. Data-to-simulation efficiency ratios are determined to account for the small residual efficiency differences. These factors are measured with uncertainties between 0.5% and 5% depending on the photon transverse momentum and pseudorapidity.

Permanent Link: http://hdl.handle.net/11104/0305762