Measurement of jet charge in dijet events from s =8 TeV pp collisions with the ATLAS detector

The momentum-weighted sum of the charges of tracks associated to a jet is sensitive to the charge of the initiating quark or gluon. This paper presents a measurement of the distribution of momentum-weighted sums, called jet charge, in dijet events using 20.3 fb-1 of data recorded with the ATLAS dete...

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Autor principal: Aad, G.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_24700010_v93_n5_p_Aad
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
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spelling todo:paper_24700010_v93_n5_p_Aad2023-10-03T16:41:55Z Measurement of jet charge in dijet events from s =8 TeV pp collisions with the ATLAS detector Aad, G. The momentum-weighted sum of the charges of tracks associated to a jet is sensitive to the charge of the initiating quark or gluon. This paper presents a measurement of the distribution of momentum-weighted sums, called jet charge, in dijet events using 20.3 fb-1 of data recorded with the ATLAS detector at s=8 TeV in pp collisions at the LHC. The jet charge distribution is unfolded to remove distortions from detector effects and the resulting particle-level distribution is compared with several models. The pT dependence of the jet charge distribution average and standard deviation are compared to predictions obtained with several leading-order and next-to-leading-order parton distribution functions. The data are also compared to different Monte Carlo simulations of QCD dijet production using various settings of the free parameters within these models. The chosen value of the strong coupling constant used to calculate gluon radiation is found to have a significant impact on the predicted jet charge. There is evidence for a pT dependence of the jet charge distribution for a given jet flavor. In agreement with perturbative QCD predictions, the data show that the average jet charge of quark-initiated jets decreases in magnitude as the energy of the jet increases. © 2016 CERN. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_24700010_v93_n5_p_Aad
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 momentum-weighted sum of the charges of tracks associated to a jet is sensitive to the charge of the initiating quark or gluon. This paper presents a measurement of the distribution of momentum-weighted sums, called jet charge, in dijet events using 20.3 fb-1 of data recorded with the ATLAS detector at s=8 TeV in pp collisions at the LHC. The jet charge distribution is unfolded to remove distortions from detector effects and the resulting particle-level distribution is compared with several models. The pT dependence of the jet charge distribution average and standard deviation are compared to predictions obtained with several leading-order and next-to-leading-order parton distribution functions. The data are also compared to different Monte Carlo simulations of QCD dijet production using various settings of the free parameters within these models. The chosen value of the strong coupling constant used to calculate gluon radiation is found to have a significant impact on the predicted jet charge. There is evidence for a pT dependence of the jet charge distribution for a given jet flavor. In agreement with perturbative QCD predictions, the data show that the average jet charge of quark-initiated jets decreases in magnitude as the energy of the jet increases. © 2016 CERN.
format JOUR
author Aad, G.
spellingShingle Aad, G.
Measurement of jet charge in dijet events from s =8 TeV pp collisions with the ATLAS detector
author_facet Aad, G.
author_sort Aad, G.
title Measurement of jet charge in dijet events from s =8 TeV pp collisions with the ATLAS detector
title_short Measurement of jet charge in dijet events from s =8 TeV pp collisions with the ATLAS detector
title_full Measurement of jet charge in dijet events from s =8 TeV pp collisions with the ATLAS detector
title_fullStr Measurement of jet charge in dijet events from s =8 TeV pp collisions with the ATLAS detector
title_full_unstemmed Measurement of jet charge in dijet events from s =8 TeV pp collisions with the ATLAS detector
title_sort measurement of jet charge in dijet events from s =8 tev pp collisions with the atlas detector
url http://hdl.handle.net/20.500.12110/paper_24700010_v93_n5_p_Aad
work_keys_str_mv AT aadg measurementofjetchargeindijeteventsfroms8tevppcollisionswiththeatlasdetector
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