Measurement of the cross section of top quark-antiquark pair production in association with a W boson in proton-proton collisions at √s = 13 TeV
Autor(a) principal: | |
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Data de Publicação: | 2023 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/270340 |
Resumo: | The production of a top quark-antiquark pair in association with a W boson (t¯tW) is measured in proton-proton collisions at a center-of-mass energy of 13 TeV. The analyzed data was recorded by the CMS experiment at the CERN LHC and corresponds to an integrated luminosity of 138 fb−1 . Events with two or three leptons (electrons and muons) and additional jets are selected. In events with two leptons, a multiclass neural network is used to distinguish between the signal and background processes. Events with three leptons are categorized based on the number of jets and of jets originating from b quark hadronization, and the lepton charges. The inclusive t¯tW production cross section in the full phase space is measured to be 868±40(stat)±51(syst)fb. The t¯tW+ and t¯tW− cross sections are also measured as 553±30(stat)±30(syst) and 343±26(stat)±25(syst)fb, respectively, and the corresponding ratio of the two cross sections is found to be 1.61 ± 0.15(stat) +0.07 −0.05(syst). The measured cross sections are larger than but consistent with the standard model predictions within two standard deviations, and represent the most precise measurement of these cross sections to date. |
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Tumasyan, ArmenSilveira, Gustavo Gil daBernardes, César AugustoCMS Collaboration2023-12-19T03:24:27Z20231029-8479http://hdl.handle.net/10183/270340001186723The production of a top quark-antiquark pair in association with a W boson (t¯tW) is measured in proton-proton collisions at a center-of-mass energy of 13 TeV. The analyzed data was recorded by the CMS experiment at the CERN LHC and corresponds to an integrated luminosity of 138 fb−1 . Events with two or three leptons (electrons and muons) and additional jets are selected. In events with two leptons, a multiclass neural network is used to distinguish between the signal and background processes. Events with three leptons are categorized based on the number of jets and of jets originating from b quark hadronization, and the lepton charges. The inclusive t¯tW production cross section in the full phase space is measured to be 868±40(stat)±51(syst)fb. The t¯tW+ and t¯tW− cross sections are also measured as 553±30(stat)±30(syst) and 343±26(stat)±25(syst)fb, respectively, and the corresponding ratio of the two cross sections is found to be 1.61 ± 0.15(stat) +0.07 −0.05(syst). The measured cross sections are larger than but consistent with the standard model predictions within two standard deviations, and represent the most precise measurement of these cross sections to date.application/pdfengThe journal of high energy physics. Trieste. No. 7 (July 2023), 219, 53 p.Aceleradores de partículasQuarksColisões proton-protonHadron-Hadron scatteringTop PhysicsMeasurement of the cross section of top quark-antiquark pair production in association with a W boson in proton-proton 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:UFRGSTEXT001186723.pdf.txt001186723.pdf.txtExtracted Texttext/plain140537http://www.lume.ufrgs.br/bitstream/10183/270340/2/001186723.pdf.txtffc8109c0406e17d5f49e88f54f05048MD52ORIGINAL001186723.pdfTexto completo (inglês)application/pdf1525317http://www.lume.ufrgs.br/bitstream/10183/270340/1/001186723.pdf32daea0f73d54cccb84d330bf74221c4MD5110183/2703402023-12-20 04:21:50.672003oai:www.lume.ufrgs.br:10183/270340Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-12-20T06:21:50Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Measurement of the cross section of top quark-antiquark pair production in association with a W boson in proton-proton collisions at √s = 13 TeV |
title |
Measurement of the cross section of top quark-antiquark pair production in association with a W boson in proton-proton collisions at √s = 13 TeV |
spellingShingle |
Measurement of the cross section of top quark-antiquark pair production in association with a W boson in proton-proton collisions at √s = 13 TeV Tumasyan, Armen Aceleradores de partículas Quarks Colisões proton-proton Hadron-Hadron scattering Top Physics |
title_short |
Measurement of the cross section of top quark-antiquark pair production in association with a W boson in proton-proton collisions at √s = 13 TeV |
title_full |
Measurement of the cross section of top quark-antiquark pair production in association with a W boson in proton-proton collisions at √s = 13 TeV |
title_fullStr |
Measurement of the cross section of top quark-antiquark pair production in association with a W boson in proton-proton collisions at √s = 13 TeV |
title_full_unstemmed |
Measurement of the cross section of top quark-antiquark pair production in association with a W boson in proton-proton collisions at √s = 13 TeV |
title_sort |
Measurement of the cross section of top quark-antiquark pair production in association with a W boson in proton-proton collisions at √s = 13 TeV |
author |
Tumasyan, Armen |
author_facet |
Tumasyan, Armen Silveira, Gustavo Gil da Bernardes, César Augusto CMS Collaboration |
author_role |
author |
author2 |
Silveira, Gustavo Gil da Bernardes, César Augusto CMS Collaboration |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Tumasyan, Armen Silveira, Gustavo Gil da Bernardes, César Augusto CMS Collaboration |
dc.subject.por.fl_str_mv |
Aceleradores de partículas Quarks Colisões proton-proton |
topic |
Aceleradores de partículas Quarks Colisões proton-proton Hadron-Hadron scattering Top Physics |
dc.subject.eng.fl_str_mv |
Hadron-Hadron scattering Top Physics |
description |
The production of a top quark-antiquark pair in association with a W boson (t¯tW) is measured in proton-proton collisions at a center-of-mass energy of 13 TeV. The analyzed data was recorded by the CMS experiment at the CERN LHC and corresponds to an integrated luminosity of 138 fb−1 . Events with two or three leptons (electrons and muons) and additional jets are selected. In events with two leptons, a multiclass neural network is used to distinguish between the signal and background processes. Events with three leptons are categorized based on the number of jets and of jets originating from b quark hadronization, and the lepton charges. The inclusive t¯tW production cross section in the full phase space is measured to be 868±40(stat)±51(syst)fb. The t¯tW+ and t¯tW− cross sections are also measured as 553±30(stat)±30(syst) and 343±26(stat)±25(syst)fb, respectively, and the corresponding ratio of the two cross sections is found to be 1.61 ± 0.15(stat) +0.07 −0.05(syst). The measured cross sections are larger than but consistent with the standard model predictions within two standard deviations, and represent the most precise measurement of these cross sections to date. |
publishDate |
2023 |
dc.date.accessioned.fl_str_mv |
2023-12-19T03:24:27Z |
dc.date.issued.fl_str_mv |
2023 |
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/10183/270340 |
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1029-8479 |
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001186723 |
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http://hdl.handle.net/10183/270340 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
The journal of high energy physics. Trieste. No. 7 (July 2023), 219, 53 p. |
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info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
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