Tagging b-jets using low-p_T electrons

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This note presents a study of b-jet tagging in ATLAS using soft electrons from semileptonic b-quark decays. Both Inner Detector and EM Calorimeter information is used by the b-tagging algorithm to identify signal electrons inside jets. The performance of this algorithm in terms of expected b-tagging...

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Detalles Bibliográficos
Autores principales: Jagielski, S, Kaczmarska, A, Wolter, M
Lenguaje:eng
Publicado: 1998
Materias:
Detectors and Experimental Techniques
Acceso en línea:http://cds.cern.ch/record/683744
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author Jagielski, S
Kaczmarska, A
Wolter, M
author_facet Jagielski, S
Kaczmarska, A
Wolter, M
author_sort Jagielski, S
collection CERN
description This note presents a study of b-jet tagging in ATLAS using soft electrons from semileptonic b-quark decays. Both Inner Detector and EM Calorimeter information is used by the b-tagging algorithm to identify signal electrons inside jets. The performance of this algorithm in terms of expected b-tagging efficiency and non-b jet rejection is discussed in detail over the small central rapidity range and for low luminosity operation. For an algorithm efficiency of 50%$ (and an overall efficiency of 7.2% taking into account the branching ratio of b to e decays), rejections of 554 against u-jets, 192 against gluon jets and of 47 against c-jets can be achieved. Such a soft-electron b-tagging algorithm can be combined with the higher-efficiency vertexing algorithm to improve the b-jet tagging performance.
id cern-683744
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1998
record_format invenio
spelling cern-6837442019-09-30T06:29:59Zhttp://cds.cern.ch/record/683744engJagielski, SKaczmarska, AWolter, MTagging b-jets using low-p_T electronsDetectors and Experimental TechniquesThis note presents a study of b-jet tagging in ATLAS using soft electrons from semileptonic b-quark decays. Both Inner Detector and EM Calorimeter information is used by the b-tagging algorithm to identify signal electrons inside jets. The performance of this algorithm in terms of expected b-tagging efficiency and non-b jet rejection is discussed in detail over the small central rapidity range and for low luminosity operation. For an algorithm efficiency of 50%$ (and an overall efficiency of 7.2% taking into account the branching ratio of b to e decays), rejections of 554 against u-jets, 192 against gluon jets and of 47 against c-jets can be achieved. Such a soft-electron b-tagging algorithm can be combined with the higher-efficiency vertexing algorithm to improve the b-jet tagging performance.ATL-PHYS-98-129oai:cds.cern.ch:6837441998-10-30
spellingShingle Detectors and Experimental Techniques
Jagielski, S
Kaczmarska, A
Wolter, M
Tagging b-jets using low-p_T electrons
title Tagging b-jets using low-p_T electrons
title_full Tagging b-jets using low-p_T electrons
title_fullStr Tagging b-jets using low-p_T electrons
title_full_unstemmed Tagging b-jets using low-p_T electrons
title_short Tagging b-jets using low-p_T electrons
title_sort tagging b-jets using low-p_t electrons
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/683744
work_keys_str_mv AT jagielskis taggingbjetsusinglowptelectrons
AT kaczmarskaa taggingbjetsusinglowptelectrons
AT wolterm taggingbjetsusinglowptelectrons

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