Search for CP violation using t¯t events in the lepton+jets channel in pp collisions at √s = 13 TeV

Detalhes bibliográficos
Autor(a) principal: Tumasyan, Armen
Data de Publicação: 2023
Outros Autores: Silveira, Gustavo Gil da, Bernardes, César Augusto, CMS Collaboration
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/270377
Resumo: Results are presented on a search for CP violation in the production and decay of top quark-antiquark pairs in the lepton+jets channel. The search is based on data from proton-proton collisions at √ s = 13 TeV, collected with the CMS detector, corresponding to an integrated luminosity of 138 fb−1 . Possible CP violation effects are evaluated by measuring asymmetries in observables constructed from linearly independent four-momentum vectors of the final-state particles. The dimensionless chromoelectric dipole moment of the top quark obtained from the observed asymmetries is measured to be 0.04±0.10 (stat)±0.07(syst), and the asymmetries exhibit no evidence for CP-violating effects, consistent with expectations from the standard model.
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spelling Tumasyan, ArmenSilveira, Gustavo Gil daBernardes, César AugustoCMS Collaboration2023-12-19T03:25:10Z20231029-8479http://hdl.handle.net/10183/270377001186845Results are presented on a search for CP violation in the production and decay of top quark-antiquark pairs in the lepton+jets channel. The search is based on data from proton-proton collisions at √ s = 13 TeV, collected with the CMS detector, corresponding to an integrated luminosity of 138 fb−1 . Possible CP violation effects are evaluated by measuring asymmetries in observables constructed from linearly independent four-momentum vectors of the final-state particles. The dimensionless chromoelectric dipole moment of the top quark obtained from the observed asymmetries is measured to be 0.04±0.10 (stat)±0.07(syst), and the asymmetries exhibit no evidence for CP-violating effects, consistent with expectations from the standard model.application/pdfengThe journal of high energy physics. Trieste. No. 6 (June 2023), 081, 46 p.Aceleradores de partículasHadronsColisões proton-protonCP violationHadron-Hadron scatteringTop PhysicsSearch for CP violation using t¯t events in the lepton+jets channel 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:UFRGSTEXT001186845.pdf.txt001186845.pdf.txtExtracted Texttext/plain119070http://www.lume.ufrgs.br/bitstream/10183/270377/2/001186845.pdf.txt14672fefb8f7274c877b413c2025172dMD52ORIGINAL001186845.pdfTexto completo (inglês)application/pdf1280079http://www.lume.ufrgs.br/bitstream/10183/270377/1/001186845.pdfda0e5f255ae68766586f87b749f2c303MD5110183/2703772023-12-20 04:22:54.138572oai:www.lume.ufrgs.br:10183/270377Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-12-20T06:22:54Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Search for CP violation using t¯t events in the lepton+jets channel in pp collisions at √s = 13 TeV
title Search for CP violation using t¯t events in the lepton+jets channel in pp collisions at √s = 13 TeV
spellingShingle Search for CP violation using t¯t events in the lepton+jets channel in pp collisions at √s = 13 TeV
Tumasyan, Armen
Aceleradores de partículas
Hadrons
Colisões proton-proton
CP violation
Hadron-Hadron scattering
Top Physics
title_short Search for CP violation using t¯t events in the lepton+jets channel in pp collisions at √s = 13 TeV
title_full Search for CP violation using t¯t events in the lepton+jets channel in pp collisions at √s = 13 TeV
title_fullStr Search for CP violation using t¯t events in the lepton+jets channel in pp collisions at √s = 13 TeV
title_full_unstemmed Search for CP violation using t¯t events in the lepton+jets channel in pp collisions at √s = 13 TeV
title_sort Search for CP violation using t¯t events in the lepton+jets channel in pp 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
Hadrons
Colisões proton-proton
topic Aceleradores de partículas
Hadrons
Colisões proton-proton
CP violation
Hadron-Hadron scattering
Top Physics
dc.subject.eng.fl_str_mv CP violation
Hadron-Hadron scattering
Top Physics
description Results are presented on a search for CP violation in the production and decay of top quark-antiquark pairs in the lepton+jets channel. The search is based on data from proton-proton collisions at √ s = 13 TeV, collected with the CMS detector, corresponding to an integrated luminosity of 138 fb−1 . Possible CP violation effects are evaluated by measuring asymmetries in observables constructed from linearly independent four-momentum vectors of the final-state particles. The dimensionless chromoelectric dipole moment of the top quark obtained from the observed asymmetries is measured to be 0.04±0.10 (stat)±0.07(syst), and the asymmetries exhibit no evidence for CP-violating effects, consistent with expectations from the standard model.
publishDate 2023
dc.date.accessioned.fl_str_mv 2023-12-19T03:25:10Z
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/10183/270377
dc.identifier.issn.pt_BR.fl_str_mv 1029-8479
dc.identifier.nrb.pt_BR.fl_str_mv 001186845
identifier_str_mv 1029-8479
001186845
url http://hdl.handle.net/10183/270377
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. 6 (June 2023), 081, 46 p.
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.source.none.fl_str_mv reponame:Repositório Institucional da UFRGS
instname:Universidade Federal do Rio Grande do Sul (UFRGS)
instacron:UFRGS
instname_str Universidade Federal do Rio Grande do Sul (UFRGS)
instacron_str UFRGS
institution UFRGS
reponame_str Repositório Institucional da UFRGS
collection Repositório Institucional da UFRGS
bitstream.url.fl_str_mv http://www.lume.ufrgs.br/bitstream/10183/270377/2/001186845.pdf.txt
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