Light-quark and gluon jet discrimination in pp collisions at √s=7 TeV with the ATLAS detector

A likelihood-based discriminant for the identification of quark- and gluon-initiated jets is built and validated using 4.7 fb(Formula presented.) of proton–proton collision data at (Formula presented.) collected with the ATLAS detector at the LHC. Data samples with enriched quark or gluon content ar...

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Autor principal: Aad, G.
Formato: JOUR
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_14346044_v74_n8_p1_Aad
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Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_14346044_v74_n8_p1_Aad
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spelling todo:paper_14346044_v74_n8_p1_Aad2023-10-03T16:14:59Z Light-quark and gluon jet discrimination in pp collisions at √s=7 TeV with the ATLAS detector Aad, G. A likelihood-based discriminant for the identification of quark- and gluon-initiated jets is built and validated using 4.7 fb(Formula presented.) of proton–proton collision data at (Formula presented.) collected with the ATLAS detector at the LHC. Data samples with enriched quark or gluon content are used in the construction and validation of templates of jet properties that are the input to the likelihood-based discriminant. The discriminating power of the jet tagger is established in both data and Monte Carlo samples within a systematic uncertainty of (Formula presented.) 10–20 %. In data, light-quark jets can be tagged with an efficiency of (Formula presented.) while achieving a gluon-jet mis-tag rate of (Formula presented.) in a (Formula presented.) range between (Formula presented.) and (Formula presented.) for jets in the acceptance of the tracker. The rejection of gluon-jets found in the data is significantly below what is attainable using a Pythia 6 Monte Carlo simulation, where gluon-jet mis-tag rates of 10 % can be reached for a 50 % selection efficiency of light-quark jets using the same jet properties. © 2014, The Author(s). JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_14346044_v74_n8_p1_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 A likelihood-based discriminant for the identification of quark- and gluon-initiated jets is built and validated using 4.7 fb(Formula presented.) of proton–proton collision data at (Formula presented.) collected with the ATLAS detector at the LHC. Data samples with enriched quark or gluon content are used in the construction and validation of templates of jet properties that are the input to the likelihood-based discriminant. The discriminating power of the jet tagger is established in both data and Monte Carlo samples within a systematic uncertainty of (Formula presented.) 10–20 %. In data, light-quark jets can be tagged with an efficiency of (Formula presented.) while achieving a gluon-jet mis-tag rate of (Formula presented.) in a (Formula presented.) range between (Formula presented.) and (Formula presented.) for jets in the acceptance of the tracker. The rejection of gluon-jets found in the data is significantly below what is attainable using a Pythia 6 Monte Carlo simulation, where gluon-jet mis-tag rates of 10 % can be reached for a 50 % selection efficiency of light-quark jets using the same jet properties. © 2014, The Author(s).
format JOUR
author Aad, G.
spellingShingle Aad, G.
Light-quark and gluon jet discrimination in pp collisions at √s=7 TeV with the ATLAS detector
author_facet Aad, G.
author_sort Aad, G.
title Light-quark and gluon jet discrimination in pp collisions at √s=7 TeV with the ATLAS detector
title_short Light-quark and gluon jet discrimination in pp collisions at √s=7 TeV with the ATLAS detector
title_full Light-quark and gluon jet discrimination in pp collisions at √s=7 TeV with the ATLAS detector
title_fullStr Light-quark and gluon jet discrimination in pp collisions at √s=7 TeV with the ATLAS detector
title_full_unstemmed Light-quark and gluon jet discrimination in pp collisions at √s=7 TeV with the ATLAS detector
title_sort light-quark and gluon jet discrimination in pp collisions at √s=7 tev with the atlas detector
url http://hdl.handle.net/20.500.12110/paper_14346044_v74_n8_p1_Aad
work_keys_str_mv AT aadg lightquarkandgluonjetdiscriminationinppcollisionsats7tevwiththeatlasdetector
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