Performance of b-jet identification in the ATLAS experiment

The identification of jets containing b hadrons is important for the physics programme of the ATLAS experiment at the Large Hadron Collider. Several algorithms to identify jets containing b hadrons are described, ranging from those based on the reconstruction of an inclusive secondary vertex or the...

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Autor principal:	Aad, G.
Formato:	JOUR
Materias:	Large detector systems for particle and astroparticle physics Large detector-systems performance Pattern recognition, cluster finding, calibration and fitting methods Performance of High Energy Physics Detectors Calibration Hadrons Uncertainty analysis Astroparticle physics Complementary methods Fitting method High energy physics detector Large detectors Large Hadron Collider Statistical correlation Systematic uncertainties Pattern recognition systems
Acceso en línea:	http://hdl.handle.net/20.500.12110/paper_17480221_v11_n4_p_Aad
Aporte de:	Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires

id	todo:paper_17480221_v11_n4_p_Aad
record_format	dspace
spelling	todo:paper_17480221_v11_n4_p_Aad2023-10-03T16:32:08Z Performance of b-jet identification in the ATLAS experiment Aad, G. Large detector systems for particle and astroparticle physics Large detector-systems performance Pattern recognition, cluster finding, calibration and fitting methods Performance of High Energy Physics Detectors Calibration Hadrons Uncertainty analysis Astroparticle physics Complementary methods Fitting method High energy physics detector Large detectors Large Hadron Collider Statistical correlation Systematic uncertainties Pattern recognition systems The identification of jets containing b hadrons is important for the physics programme of the ATLAS experiment at the Large Hadron Collider. Several algorithms to identify jets containing b hadrons are described, ranging from those based on the reconstruction of an inclusive secondary vertex or the presence of tracks with large impact parameters to combined tagging algorithms making use of multi-variate discriminants. An independent b-tagging algorithm based on the reconstruction of muons inside jets as well as the b-tagging algorithm used in the online trigger are also presented. The b-jet tagging efficiency, the c-jet tagging efficiency and the mistag rate for light flavour jets in data have been measured with a number of complementary methods. The calibration results are presented as scale factors defined as the ratio of the efficiency (or mistag rate) in data to that in simulation. In the case of b jets, where more than one calibration method exists, the results from the various analyses have been combined taking into account the statistical correlation as well as the correlation of the sources of systematic uncertainty. © CERN 2016 for the benefit of the ATLAS collaboration, published under the terms of the Creative Commons Attribution 3.0 License by IOP Publishing Ltd and Sissa Medialab srl. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_17480221_v11_n4_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)
topic	Large detector systems for particle and astroparticle physics Large detector-systems performance Pattern recognition, cluster finding, calibration and fitting methods Performance of High Energy Physics Detectors Calibration Hadrons Uncertainty analysis Astroparticle physics Complementary methods Fitting method High energy physics detector Large detectors Large Hadron Collider Statistical correlation Systematic uncertainties Pattern recognition systems
spellingShingle	Large detector systems for particle and astroparticle physics Large detector-systems performance Pattern recognition, cluster finding, calibration and fitting methods Performance of High Energy Physics Detectors Calibration Hadrons Uncertainty analysis Astroparticle physics Complementary methods Fitting method High energy physics detector Large detectors Large Hadron Collider Statistical correlation Systematic uncertainties Pattern recognition systems Aad, G. Performance of b-jet identification in the ATLAS experiment
topic_facet	Large detector systems for particle and astroparticle physics Large detector-systems performance Pattern recognition, cluster finding, calibration and fitting methods Performance of High Energy Physics Detectors Calibration Hadrons Uncertainty analysis Astroparticle physics Complementary methods Fitting method High energy physics detector Large detectors Large Hadron Collider Statistical correlation Systematic uncertainties Pattern recognition systems
description	The identification of jets containing b hadrons is important for the physics programme of the ATLAS experiment at the Large Hadron Collider. Several algorithms to identify jets containing b hadrons are described, ranging from those based on the reconstruction of an inclusive secondary vertex or the presence of tracks with large impact parameters to combined tagging algorithms making use of multi-variate discriminants. An independent b-tagging algorithm based on the reconstruction of muons inside jets as well as the b-tagging algorithm used in the online trigger are also presented. The b-jet tagging efficiency, the c-jet tagging efficiency and the mistag rate for light flavour jets in data have been measured with a number of complementary methods. The calibration results are presented as scale factors defined as the ratio of the efficiency (or mistag rate) in data to that in simulation. In the case of b jets, where more than one calibration method exists, the results from the various analyses have been combined taking into account the statistical correlation as well as the correlation of the sources of systematic uncertainty. © CERN 2016 for the benefit of the ATLAS collaboration, published under the terms of the Creative Commons Attribution 3.0 License by IOP Publishing Ltd and Sissa Medialab srl.
format	JOUR
author	Aad, G.
author_facet	Aad, G.
author_sort	Aad, G.
title	Performance of b-jet identification in the ATLAS experiment
title_short	Performance of b-jet identification in the ATLAS experiment
title_full	Performance of b-jet identification in the ATLAS experiment
title_fullStr	Performance of b-jet identification in the ATLAS experiment
title_full_unstemmed	Performance of b-jet identification in the ATLAS experiment
title_sort	performance of b-jet identification in the atlas experiment
url	http://hdl.handle.net/20.500.12110/paper_17480221_v11_n4_p_Aad
work_keys_str_mv	AT aadg performanceofbjetidentificationintheatlasexperiment
_version_	1782030349639876608

Performance of b-jet identification in the ATLAS experiment

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