Measurements of the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson at √ s = 13 TeV with the ATLAS detector
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10316/103911 https://doi.org/10.1140/epjc/s10052-021-09439-4 |
Resumo: | Measurements of both the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson (t ¯t Z) are presented. The measurements are performed by targeting final states with three or four isolated leptons (electrons or muons) and are based on √ s = 13 TeV proton–proton collision data with an integrated luminosity of 139 fb−1, recorded from 2015 to 2018 with the ATLAS detector at the CERN Large Hadron Collider. The inclusive cross section is measured to be σt ¯t Z = 0.99±0.05 (stat.) ±0.08 (syst.) pb, in agreement with the most precise theoretical predictions. The differential measurements are presented as a function of a number of kinematic variables which probe the kinematics of the t ¯t Z system. Both absolute and normalised differential crosssection measurements are performed at particle and parton levels for specific fiducial volumes and are compared with theoretical predictions at different levels of precision, based on a χ2/ndf and p value computation. Overall, good agreement is observed between the unfolded data and the predictions. |
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Measurements of the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson at √ s = 13 TeV with the ATLAS detectorMeasurements of both the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson (t ¯t Z) are presented. The measurements are performed by targeting final states with three or four isolated leptons (electrons or muons) and are based on √ s = 13 TeV proton–proton collision data with an integrated luminosity of 139 fb−1, recorded from 2015 to 2018 with the ATLAS detector at the CERN Large Hadron Collider. The inclusive cross section is measured to be σt ¯t Z = 0.99±0.05 (stat.) ±0.08 (syst.) pb, in agreement with the most precise theoretical predictions. The differential measurements are presented as a function of a number of kinematic variables which probe the kinematics of the t ¯t Z system. Both absolute and normalised differential crosssection measurements are performed at particle and parton levels for specific fiducial volumes and are compared with theoretical predictions at different levels of precision, based on a χ2/ndf and p value computation. Overall, good agreement is observed between the unfolded data and the predictions.Springer Nature2021-08info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articlehttp://hdl.handle.net/10316/103911http://hdl.handle.net/10316/103911https://doi.org/10.1140/epjc/s10052-021-09439-4engFiolhais, M. C. N.Gonçalo, R.Veloso, F.Wolters, H.ATLAS Collaborationinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2022-12-09T21:36:23Zoai:estudogeral.uc.pt:10316/103911Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T21:20:40.068980Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Measurements of the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson at √ s = 13 TeV with the ATLAS detector |
title |
Measurements of the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson at √ s = 13 TeV with the ATLAS detector |
spellingShingle |
Measurements of the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson at √ s = 13 TeV with the ATLAS detector Fiolhais, M. C. N. |
title_short |
Measurements of the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson at √ s = 13 TeV with the ATLAS detector |
title_full |
Measurements of the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson at √ s = 13 TeV with the ATLAS detector |
title_fullStr |
Measurements of the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson at √ s = 13 TeV with the ATLAS detector |
title_full_unstemmed |
Measurements of the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson at √ s = 13 TeV with the ATLAS detector |
title_sort |
Measurements of the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson at √ s = 13 TeV with the ATLAS detector |
author |
Fiolhais, M. C. N. |
author_facet |
Fiolhais, M. C. N. Gonçalo, R. Veloso, F. Wolters, H. ATLAS Collaboration |
author_role |
author |
author2 |
Gonçalo, R. Veloso, F. Wolters, H. ATLAS Collaboration |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Fiolhais, M. C. N. Gonçalo, R. Veloso, F. Wolters, H. ATLAS Collaboration |
description |
Measurements of both the inclusive and differential production cross sections of a top-quark–antiquark pair in association with a Z boson (t ¯t Z) are presented. The measurements are performed by targeting final states with three or four isolated leptons (electrons or muons) and are based on √ s = 13 TeV proton–proton collision data with an integrated luminosity of 139 fb−1, recorded from 2015 to 2018 with the ATLAS detector at the CERN Large Hadron Collider. The inclusive cross section is measured to be σt ¯t Z = 0.99±0.05 (stat.) ±0.08 (syst.) pb, in agreement with the most precise theoretical predictions. The differential measurements are presented as a function of a number of kinematic variables which probe the kinematics of the t ¯t Z system. Both absolute and normalised differential crosssection measurements are performed at particle and parton levels for specific fiducial volumes and are compared with theoretical predictions at different levels of precision, based on a χ2/ndf and p value computation. Overall, good agreement is observed between the unfolded data and the predictions. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-08 |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10316/103911 http://hdl.handle.net/10316/103911 https://doi.org/10.1140/epjc/s10052-021-09439-4 |
url |
http://hdl.handle.net/10316/103911 https://doi.org/10.1140/epjc/s10052-021-09439-4 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Springer Nature |
publisher.none.fl_str_mv |
Springer Nature |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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