Reconstruction of primary vertices at the ATLAS experiment in Run 1 proton–proton collisions at the LHC

This paper presents the method and performance of primary vertex reconstruction in proton–proton collision data recorded by the ATLAS experiment during Run 1 of the LHC. The studies presented focus on data taken during 2012 at a centre-of-mass energy of s=8 TeV. The performance has been measured as...

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Publicado: 2017
Acceso en línea:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v77_n5_p_Aaboud
http://hdl.handle.net/20.500.12110/paper_14346044_v77_n5_p_Aaboud
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id paper:paper_14346044_v77_n5_p_Aaboud
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spelling paper:paper_14346044_v77_n5_p_Aaboud2023-06-08T16:15:19Z Reconstruction of primary vertices at the ATLAS experiment in Run 1 proton–proton collisions at the LHC This paper presents the method and performance of primary vertex reconstruction in proton–proton collision data recorded by the ATLAS experiment during Run 1 of the LHC. The studies presented focus on data taken during 2012 at a centre-of-mass energy of s=8 TeV. The performance has been measured as a function of the number of interactions per bunch crossing over a wide range, from one to seventy. The measurement of the position and size of the luminous region and its use as a constraint to improve the primary vertex resolution are discussed. A longitudinal vertex position resolution of about 30μm is achieved for events with high multiplicity of reconstructed tracks. The transverse position resolution is better than 20μm and is dominated by the precision on the size of the luminous region. An analytical model is proposed to describe the primary vertex reconstruction efficiency as a function of the number of interactions per bunch crossing and of the longitudinal size of the luminous region. Agreement between the data and the predictions of this model is better than 3% up to seventy interactions per bunch crossing. © 2017, CERN for the benefit of the ATLAS collaboration. 2017 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v77_n5_p_Aaboud http://hdl.handle.net/20.500.12110/paper_14346044_v77_n5_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 This paper presents the method and performance of primary vertex reconstruction in proton–proton collision data recorded by the ATLAS experiment during Run 1 of the LHC. The studies presented focus on data taken during 2012 at a centre-of-mass energy of s=8 TeV. The performance has been measured as a function of the number of interactions per bunch crossing over a wide range, from one to seventy. The measurement of the position and size of the luminous region and its use as a constraint to improve the primary vertex resolution are discussed. A longitudinal vertex position resolution of about 30μm is achieved for events with high multiplicity of reconstructed tracks. The transverse position resolution is better than 20μm and is dominated by the precision on the size of the luminous region. An analytical model is proposed to describe the primary vertex reconstruction efficiency as a function of the number of interactions per bunch crossing and of the longitudinal size of the luminous region. Agreement between the data and the predictions of this model is better than 3% up to seventy interactions per bunch crossing. © 2017, CERN for the benefit of the ATLAS collaboration.
title Reconstruction of primary vertices at the ATLAS experiment in Run 1 proton–proton collisions at the LHC
spellingShingle Reconstruction of primary vertices at the ATLAS experiment in Run 1 proton–proton collisions at the LHC
title_short Reconstruction of primary vertices at the ATLAS experiment in Run 1 proton–proton collisions at the LHC
title_full Reconstruction of primary vertices at the ATLAS experiment in Run 1 proton–proton collisions at the LHC
title_fullStr Reconstruction of primary vertices at the ATLAS experiment in Run 1 proton–proton collisions at the LHC
title_full_unstemmed Reconstruction of primary vertices at the ATLAS experiment in Run 1 proton–proton collisions at the LHC
title_sort reconstruction of primary vertices at the atlas experiment in run 1 proton–proton collisions at the lhc
publishDate 2017
url https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14346044_v77_n5_p_Aaboud
http://hdl.handle.net/20.500.12110/paper_14346044_v77_n5_p_Aaboud
_version_ 1768542235591180288

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