Measurement of differential t¯t production cross sections using top quarks at large transverse momenta in pp collisions at √s=13 TeV
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/235069 |
Resumo: | A measurement is reported of differential top quark pair (t¯t) production cross sections, where top quarks are produced at large transverse momenta. The data collected with the CMS detector at the LHC are from pp collisions at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 35.9 fb−1. The measurement uses events where at least one top quark decays as t→Wb→q¯q′b and is reconstructed as a large-radius jet with transverse momentum in excess of 400 GeV. The second top quark is required to decay either in a similar way or leptonically, as inferred from a reconstructed electron or muon, a bottom quark jet, and missing transverse momentum due to the undetected neutrino. The cross section is extracted as a function of kinematic variables of individual top quarks or of the t¯t system. The results are presented at the particle level, within a region of phase space close to that of the experimental acceptance, and at the parton level and are compared to various theoretical models. In both decay channels, the observed absolute cross sections are significantly lower than the predictions from theory, while the normalized differential measurements are well described. |
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Sirunyan, A. M.Silveira, Gustavo Gil daCMS Collaboration2022-02-12T04:50:53Z20210556-2821http://hdl.handle.net/10183/235069001128032A measurement is reported of differential top quark pair (t¯t) production cross sections, where top quarks are produced at large transverse momenta. The data collected with the CMS detector at the LHC are from pp collisions at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 35.9 fb−1. The measurement uses events where at least one top quark decays as t→Wb→q¯q′b and is reconstructed as a large-radius jet with transverse momentum in excess of 400 GeV. The second top quark is required to decay either in a similar way or leptonically, as inferred from a reconstructed electron or muon, a bottom quark jet, and missing transverse momentum due to the undetected neutrino. The cross section is extracted as a function of kinematic variables of individual top quarks or of the t¯t system. The results are presented at the particle level, within a region of phase space close to that of the experimental acceptance, and at the parton level and are compared to various theoretical models. In both decay channels, the observed absolute cross sections are significantly lower than the predictions from theory, while the normalized differential measurements are well described.application/pdfengPhysical Review. D, Particles and fields. Woodbury. Vol. 103, no. 5 (Mar. 2021), 052008, 43 p.Aceleradores de partículasColisões proton-protonMeasurement of differential t¯t production cross sections using top quarks at large transverse momenta in pp collisions at √s=13 TeVEstrangeiroinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da UFRGSinstname:Universidade Federal do Rio Grande do Sul (UFRGS)instacron:UFRGSTEXT001128032.pdf.txt001128032.pdf.txtExtracted Texttext/plain169508http://www.lume.ufrgs.br/bitstream/10183/235069/2/001128032.pdf.txt099796e126fad449f578a6524a8c152eMD52ORIGINAL001128032.pdfTexto completo (inglês)application/pdf2748894http://www.lume.ufrgs.br/bitstream/10183/235069/1/001128032.pdf5b7122dccbf5eecb1aa0384bbd74e4e7MD5110183/2350692023-07-20 03:33:09.39427oai:www.lume.ufrgs.br:10183/235069Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-20T06:33:09Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Measurement of differential t¯t production cross sections using top quarks at large transverse momenta in pp collisions at √s=13 TeV |
title |
Measurement of differential t¯t production cross sections using top quarks at large transverse momenta in pp collisions at √s=13 TeV |
spellingShingle |
Measurement of differential t¯t production cross sections using top quarks at large transverse momenta in pp collisions at √s=13 TeV Sirunyan, A. M. Aceleradores de partículas Colisões proton-proton |
title_short |
Measurement of differential t¯t production cross sections using top quarks at large transverse momenta in pp collisions at √s=13 TeV |
title_full |
Measurement of differential t¯t production cross sections using top quarks at large transverse momenta in pp collisions at √s=13 TeV |
title_fullStr |
Measurement of differential t¯t production cross sections using top quarks at large transverse momenta in pp collisions at √s=13 TeV |
title_full_unstemmed |
Measurement of differential t¯t production cross sections using top quarks at large transverse momenta in pp collisions at √s=13 TeV |
title_sort |
Measurement of differential t¯t production cross sections using top quarks at large transverse momenta in pp collisions at √s=13 TeV |
author |
Sirunyan, A. M. |
author_facet |
Sirunyan, A. M. Silveira, Gustavo Gil da CMS Collaboration |
author_role |
author |
author2 |
Silveira, Gustavo Gil da CMS Collaboration |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Sirunyan, A. M. Silveira, Gustavo Gil da CMS Collaboration |
dc.subject.por.fl_str_mv |
Aceleradores de partículas Colisões proton-proton |
topic |
Aceleradores de partículas Colisões proton-proton |
description |
A measurement is reported of differential top quark pair (t¯t) production cross sections, where top quarks are produced at large transverse momenta. The data collected with the CMS detector at the LHC are from pp collisions at a center-of-mass energy of 13 TeV corresponding to an integrated luminosity of 35.9 fb−1. The measurement uses events where at least one top quark decays as t→Wb→q¯q′b and is reconstructed as a large-radius jet with transverse momentum in excess of 400 GeV. The second top quark is required to decay either in a similar way or leptonically, as inferred from a reconstructed electron or muon, a bottom quark jet, and missing transverse momentum due to the undetected neutrino. The cross section is extracted as a function of kinematic variables of individual top quarks or of the t¯t system. The results are presented at the particle level, within a region of phase space close to that of the experimental acceptance, and at the parton level and are compared to various theoretical models. In both decay channels, the observed absolute cross sections are significantly lower than the predictions from theory, while the normalized differential measurements are well described. |
publishDate |
2021 |
dc.date.issued.fl_str_mv |
2021 |
dc.date.accessioned.fl_str_mv |
2022-02-12T04:50:53Z |
dc.type.driver.fl_str_mv |
Estrangeiro info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/235069 |
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0556-2821 |
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001128032 |
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0556-2821 001128032 |
url |
http://hdl.handle.net/10183/235069 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Physical Review. D, Particles and fields. Woodbury. Vol. 103, no. 5 (Mar. 2021), 052008, 43 p. |
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info:eu-repo/semantics/openAccess |
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openAccess |
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application/pdf |
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