Evidence for four-top quark production 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/10183/278497 |
Resumo: | The production of four top quarks (ttt¯ t)¯ is studied with LHC proton-proton collision data samples collected by the CMS experiment at a center-of-mass energy of 13 TeV, and corresponding to integrated luminosities of up to 138 fb−1. Events that have no leptons (all-hadronic), one lepton, or two opposite sign leptons (where lepton refers only to prompt electrons or prompt muons) are considered. This is the first ttt¯ t measurement ¯ that includes the all-hadronic final state. The observed significance of the ttt¯ t¯ signal in these final states of 3.9 standard deviations (1.5 expected) provides evidence for ttt¯ t production, ¯ with a measured cross section of 36+12 −11 fb. Combined with earlier CMS results in other final states, the signal significance is 4.0 standard deviations (3.2 expected). The combination returns an observed cross section of 17 ± 4 (stat) ± 3 (syst) fb, which is consistent with the standard model prediction. |
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Tumasyan, ArmenSilveira, Gustavo Gil daBernardes, César AugustoCMS Collaboration2024-09-06T06:39:07Z20230370-2693http://hdl.handle.net/10183/278497001197873The production of four top quarks (ttt¯ t)¯ is studied with LHC proton-proton collision data samples collected by the CMS experiment at a center-of-mass energy of 13 TeV, and corresponding to integrated luminosities of up to 138 fb−1. Events that have no leptons (all-hadronic), one lepton, or two opposite sign leptons (where lepton refers only to prompt electrons or prompt muons) are considered. This is the first ttt¯ t measurement ¯ that includes the all-hadronic final state. The observed significance of the ttt¯ t¯ signal in these final states of 3.9 standard deviations (1.5 expected) provides evidence for ttt¯ t production, ¯ with a measured cross section of 36+12 −11 fb. Combined with earlier CMS results in other final states, the signal significance is 4.0 standard deviations (3.2 expected). The combination returns an observed cross section of 17 ± 4 (stat) ± 3 (syst) fb, which is consistent with the standard model prediction.application/pdfengPhysics letters. B. Amsterdam. Vol. 844 (Sept. 2023), 138076, 25 p.Aceleradores de partículasColisões proton-protonCMSTop quarkEvidence for four-top quark production 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:UFRGSTEXT001197873.pdf.txt001197873.pdf.txtExtracted Texttext/plain103535http://www.lume.ufrgs.br/bitstream/10183/278497/2/001197873.pdf.txt761446d6c02748fc8d9e43602b9f08bdMD52ORIGINAL001197873.pdfTexto completo (inglês)application/pdf967545http://www.lume.ufrgs.br/bitstream/10183/278497/1/001197873.pdfd53382e2b3dea088e0ce5eee92268cd4MD5110183/2784972024-09-07 06:18:57.587105oai:www.lume.ufrgs.br:10183/278497Repositório InstitucionalPUBhttps://lume.ufrgs.br/oai/requestlume@ufrgs.bropendoar:2024-09-07T09:18:57Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Evidence for four-top quark production in proton-proton collisions at √s = 13 TeV |
title |
Evidence for four-top quark production in proton-proton collisions at √s = 13 TeV |
spellingShingle |
Evidence for four-top quark production in proton-proton collisions at √s = 13 TeV Tumasyan, Armen Aceleradores de partículas Colisões proton-proton CMS Top quark |
title_short |
Evidence for four-top quark production in proton-proton collisions at √s = 13 TeV |
title_full |
Evidence for four-top quark production in proton-proton collisions at √s = 13 TeV |
title_fullStr |
Evidence for four-top quark production in proton-proton collisions at √s = 13 TeV |
title_full_unstemmed |
Evidence for four-top quark production in proton-proton collisions at √s = 13 TeV |
title_sort |
Evidence for four-top quark production 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 Colisões proton-proton |
topic |
Aceleradores de partículas Colisões proton-proton CMS Top quark |
dc.subject.eng.fl_str_mv |
CMS Top quark |
description |
The production of four top quarks (ttt¯ t)¯ is studied with LHC proton-proton collision data samples collected by the CMS experiment at a center-of-mass energy of 13 TeV, and corresponding to integrated luminosities of up to 138 fb−1. Events that have no leptons (all-hadronic), one lepton, or two opposite sign leptons (where lepton refers only to prompt electrons or prompt muons) are considered. This is the first ttt¯ t measurement ¯ that includes the all-hadronic final state. The observed significance of the ttt¯ t¯ signal in these final states of 3.9 standard deviations (1.5 expected) provides evidence for ttt¯ t production, ¯ with a measured cross section of 36+12 −11 fb. Combined with earlier CMS results in other final states, the signal significance is 4.0 standard deviations (3.2 expected). The combination returns an observed cross section of 17 ± 4 (stat) ± 3 (syst) fb, which is consistent with the standard model prediction. |
publishDate |
2023 |
dc.date.issued.fl_str_mv |
2023 |
dc.date.accessioned.fl_str_mv |
2024-09-06T06:39:07Z |
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/10183/278497 |
dc.identifier.issn.pt_BR.fl_str_mv |
0370-2693 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001197873 |
identifier_str_mv |
0370-2693 001197873 |
url |
http://hdl.handle.net/10183/278497 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Physics letters. B. Amsterdam. Vol. 844 (Sept. 2023), 138076, 25 p. |
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info:eu-repo/semantics/openAccess |
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openAccess |
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