Measurement of the photon identification efficiencies with the ATLAS detector using LHC Run-1 data

The algorithms used by the ATLAS Collaboration to reconstruct and identify prompt photons are described. Measurements of the photon identification efficiencies are reported, using 4.9 fb - 1 of pp collision data collected at the LHC at s=7 TeV and 20.3 fb - 1 at s=8 TeV. The efficiencies are measure...

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Publicado: 2016
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v76_n12_p_Aaboud
http://hdl.handle.net/20.500.12110/paper_14346044_v76_n12_p_Aaboud
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_14346044_v76_n12_p_Aaboud
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spelling paper:paper_14346044_v76_n12_p_Aaboud2023-06-08T16:15:08Z Measurement of the photon identification efficiencies with the ATLAS detector using LHC Run-1 data The algorithms used by the ATLAS Collaboration to reconstruct and identify prompt photons are described. Measurements of the photon identification efficiencies are reported, using 4.9 fb - 1 of pp collision data collected at the LHC at s=7 TeV and 20.3 fb - 1 at s=8 TeV. The efficiencies are measured separately for converted and unconverted 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 to the predictions from a simulation of the detector response, after correcting the electromagnetic shower momenta in the simulation for the average differences observed with respect to data. Data-to-simulation efficiency ratios used as correction factors in physics measurements are determined to account for the small residual efficiency differences. These factors are measured with uncertainties between 0.5% and 10% in 7 TeV data and between 0.5% and 5.6% in 8 TeV data, depending on the photon transverse momentum and pseudorapidity. © 2016, CERN for the benefit of the ATLAS collaboration. 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v76_n12_p_Aaboud http://hdl.handle.net/20.500.12110/paper_14346044_v76_n12_p_Aaboud
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
description The algorithms used by the ATLAS Collaboration to reconstruct and identify prompt photons are described. Measurements of the photon identification efficiencies are reported, using 4.9 fb - 1 of pp collision data collected at the LHC at s=7 TeV and 20.3 fb - 1 at s=8 TeV. The efficiencies are measured separately for converted and unconverted 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 to the predictions from a simulation of the detector response, after correcting the electromagnetic shower momenta in the simulation for the average differences observed with respect to data. Data-to-simulation efficiency ratios used as correction factors in physics measurements are determined to account for the small residual efficiency differences. These factors are measured with uncertainties between 0.5% and 10% in 7 TeV data and between 0.5% and 5.6% in 8 TeV data, depending on the photon transverse momentum and pseudorapidity. © 2016, CERN for the benefit of the ATLAS collaboration.
title Measurement of the photon identification efficiencies with the ATLAS detector using LHC Run-1 data
spellingShingle Measurement of the photon identification efficiencies with the ATLAS detector using LHC Run-1 data
title_short Measurement of the photon identification efficiencies with the ATLAS detector using LHC Run-1 data
title_full Measurement of the photon identification efficiencies with the ATLAS detector using LHC Run-1 data
title_fullStr Measurement of the photon identification efficiencies with the ATLAS detector using LHC Run-1 data
title_full_unstemmed Measurement of the photon identification efficiencies with the ATLAS detector using LHC Run-1 data
title_sort measurement of the photon identification efficiencies with the atlas detector using lhc run-1 data
publishDate 2016
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v76_n12_p_Aaboud
http://hdl.handle.net/20.500.12110/paper_14346044_v76_n12_p_Aaboud
_version_ 1768546363549679616

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