Measurements of fiducial cross-sections for t ̄t production with one or two additional b-jets in pp collisions at √s = 8 TeV using the ATLAS detector

Autores
Alconada Verzini, María Josefina; Alonso, Francisco; Arduh, Francisco Anuar; Dova, María Teresa; Monticelli, Fernando Gabriel; Wahlberg, Hernán Pablo; The ATLAS Collaboration
Año de publicación
2016
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Fiducial cross-sections for t ̄t production with one or two additional b-jets are reported, using an integrated luminosity of 20.3 fb−1 of proton–proton collisions at a centre-of-mass energy of 8 TeV at the Large Hadron Collider, collected with the ATLAS detector. The cross-section times branching ratio for t ̄t events with at least one additional b-jet is measured to be 950 ± 70 (stat.) +240−190 (syst.) fb in the lepton-plus-jets channel and 50 ± 10 (stat.) +15−10 (syst.) fb in the eμ channel. The cross-section times branching ratio for events with at least two additional b-jets is measured to be 19.3 ± 3.5 (stat.) ± 5.7 (syst.) fb in the dilepton chan- nel (eμ,μμ, and ee) using a method based on tight selection criteria, and 13.5 ± 3.3 (stat.) ± 3.6 (syst.) fb using a looser selection that allows the background normalisation to be extracted from data. The latter method also measures a value of 1.30 ± 0.33 (stat.) ± 0.28 (syst.)% for the ratio of t ̄t production with two additional b-jets to t ̄t production with any two additional jets. All measurements are in good agreement with recent theory predictions.
Facultad de Ciencias Exactas
Materia
Ciencias Exactas
Física
top quark
b-jets
ATLAS detector
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by/4.0/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/79709
Acceder
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oai_identifier_str oai:sedici.unlp.edu.ar:10915/79709
network_acronym_str SEDICI
repository_id_str 1329
network_name_str SEDICI (UNLP)
spelling Measurements of fiducial cross-sections for t ̄t production with one or two additional b-jets in pp collisions at √s = 8 TeV using the ATLAS detectorAlconada Verzini, María JosefinaAlonso, FranciscoArduh, Francisco AnuarDova, María TeresaMonticelli, Fernando GabrielWahlberg, Hernán PabloThe ATLAS CollaborationCiencias ExactasFísicatop quarkb-jetsATLAS detectorFiducial cross-sections for t ̄t production with one or two additional b-jets are reported, using an integrated luminosity of 20.3 fb<sup>−1</sup> of proton–proton collisions at a centre-of-mass energy of 8 TeV at the Large Hadron Collider, collected with the ATLAS detector. The cross-section times branching ratio for t ̄t events with at least one additional b-jet is measured to be 950 ± 70 (stat.) <sup>+240</sup><sub>−190</sub> (syst.) fb in the lepton-plus-jets channel and 50 ± 10 (stat.) <sup>+15</sup><sub>−10</sub> (syst.) fb in the eμ channel. The cross-section times branching ratio for events with at least two additional b-jets is measured to be 19.3 ± 3.5 (stat.) ± 5.7 (syst.) fb in the dilepton chan- nel (eμ,μμ, and ee) using a method based on tight selection criteria, and 13.5 ± 3.3 (stat.) ± 3.6 (syst.) fb using a looser selection that allows the background normalisation to be extracted from data. The latter method also measures a value of 1.30 ± 0.33 (stat.) ± 0.28 (syst.)% for the ratio of t ̄t production with two additional b-jets to t ̄t production with any two additional jets. All measurements are in good agreement with recent theory predictions.Facultad de Ciencias Exactas2016-01-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfhttp://sedici.unlp.edu.ar/handle/10915/79709enginfo:eu-repo/semantics/altIdentifier/issn/1434-6052info:eu-repo/semantics/altIdentifier/doi/10.1140/epjc/s10052-015-3852-4info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/Creative Commons Attribution 4.0 International (CC BY 4.0)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-10-22T16:53:25Zoai:sedici.unlp.edu.ar:10915/79709Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-10-22 16:53:26.027SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Measurements of fiducial cross-sections for t ̄t production with one or two additional b-jets in pp collisions at √s = 8 TeV using the ATLAS detector
title Measurements of fiducial cross-sections for t ̄t production with one or two additional b-jets in pp collisions at √s = 8 TeV using the ATLAS detector
spellingShingle Measurements of fiducial cross-sections for t ̄t production with one or two additional b-jets in pp collisions at √s = 8 TeV using the ATLAS detector
Alconada Verzini, María Josefina
Ciencias Exactas
Física
top quark
b-jets
ATLAS detector
title_short Measurements of fiducial cross-sections for t ̄t production with one or two additional b-jets in pp collisions at √s = 8 TeV using the ATLAS detector
title_full Measurements of fiducial cross-sections for t ̄t production with one or two additional b-jets in pp collisions at √s = 8 TeV using the ATLAS detector
title_fullStr Measurements of fiducial cross-sections for t ̄t production with one or two additional b-jets in pp collisions at √s = 8 TeV using the ATLAS detector
title_full_unstemmed Measurements of fiducial cross-sections for t ̄t production with one or two additional b-jets in pp collisions at √s = 8 TeV using the ATLAS detector
title_sort Measurements of fiducial cross-sections for t ̄t production with one or two additional b-jets in pp collisions at √s = 8 TeV using the ATLAS detector
dc.creator.none.fl_str_mv Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author Alconada Verzini, María Josefina
author_facet Alconada Verzini, María Josefina
Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author_role author
author2 Alonso, Francisco
Arduh, Francisco Anuar
Dova, María Teresa
Monticelli, Fernando Gabriel
Wahlberg, Hernán Pablo
The ATLAS Collaboration
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Ciencias Exactas
Física
top quark
b-jets
ATLAS detector
topic Ciencias Exactas
Física
top quark
b-jets
ATLAS detector
dc.description.none.fl_txt_mv Fiducial cross-sections for t ̄t production with one or two additional b-jets are reported, using an integrated luminosity of 20.3 fb<sup>−1</sup> of proton–proton collisions at a centre-of-mass energy of 8 TeV at the Large Hadron Collider, collected with the ATLAS detector. The cross-section times branching ratio for t ̄t events with at least one additional b-jet is measured to be 950 ± 70 (stat.) <sup>+240</sup><sub>−190</sub> (syst.) fb in the lepton-plus-jets channel and 50 ± 10 (stat.) <sup>+15</sup><sub>−10</sub> (syst.) fb in the eμ channel. The cross-section times branching ratio for events with at least two additional b-jets is measured to be 19.3 ± 3.5 (stat.) ± 5.7 (syst.) fb in the dilepton chan- nel (eμ,μμ, and ee) using a method based on tight selection criteria, and 13.5 ± 3.3 (stat.) ± 3.6 (syst.) fb using a looser selection that allows the background normalisation to be extracted from data. The latter method also measures a value of 1.30 ± 0.33 (stat.) ± 0.28 (syst.)% for the ratio of t ̄t production with two additional b-jets to t ̄t production with any two additional jets. All measurements are in good agreement with recent theory predictions.
Facultad de Ciencias Exactas
description Fiducial cross-sections for t ̄t production with one or two additional b-jets are reported, using an integrated luminosity of 20.3 fb<sup>−1</sup> of proton–proton collisions at a centre-of-mass energy of 8 TeV at the Large Hadron Collider, collected with the ATLAS detector. The cross-section times branching ratio for t ̄t events with at least one additional b-jet is measured to be 950 ± 70 (stat.) <sup>+240</sup><sub>−190</sub> (syst.) fb in the lepton-plus-jets channel and 50 ± 10 (stat.) <sup>+15</sup><sub>−10</sub> (syst.) fb in the eμ channel. The cross-section times branching ratio for events with at least two additional b-jets is measured to be 19.3 ± 3.5 (stat.) ± 5.7 (syst.) fb in the dilepton chan- nel (eμ,μμ, and ee) using a method based on tight selection criteria, and 13.5 ± 3.3 (stat.) ± 3.6 (syst.) fb using a looser selection that allows the background normalisation to be extracted from data. The latter method also measures a value of 1.30 ± 0.33 (stat.) ± 0.28 (syst.)% for the ratio of t ̄t production with two additional b-jets to t ̄t production with any two additional jets. All measurements are in good agreement with recent theory predictions.
publishDate 2016
dc.date.none.fl_str_mv 2016-01-07
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/79709
url http://sedici.unlp.edu.ar/handle/10915/79709
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/issn/1434-6052
info:eu-repo/semantics/altIdentifier/doi/10.1140/epjc/s10052-015-3852-4
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by/4.0/
Creative Commons Attribution 4.0 International (CC BY 4.0)
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
reponame_str SEDICI (UNLP)
collection SEDICI (UNLP)
instname_str Universidad Nacional de La Plata
instacron_str UNLP
institution UNLP
repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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