Search for dark matter produced in association with a single top quark or a top quark pair in proton-proton collisions at √s = 13 TeV

Detalhes bibliográficos
Autor(a) principal: Sirunyan, A. M.
Data de Publicação: 2019
Outros Autores: Silveira, Gustavo Gil da, CMS Collaboration
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFRGS
Texto Completo: http://hdl.handle.net/10183/196330
Resumo: A search for dark matter produced in association with top quarks in protonproton collisions at a center-of-mass energy of 13TeV is presented. The data set used corresponds to an integrated luminosity of 35.9 fb1 recorded with the CMS detector at the LHC. Whereas previous searches for neutral scalar or pseudoscalar mediators considered dark matter production in association with a top quark pair only, this analysis also includes production modes with a single top quark. The results are derived from the combination of multiple selection categories that are de ned to target either the single top quark or the top quark pair signature. No signi cant deviations with respect to the standard model predictions are observed. The results are interpreted in the context of a simpli ed model in which a scalar or pseudoscalar mediator particle couples to a top quark and subsequently decays into dark matter particles. Scalar and pseudoscalar mediator particles with masses below 290 and 300 GeV, respectively, are excluded at 95% con dence level, assuming a dark matter particle mass of 1 GeV and mediator couplings to fermions and dark matter particles equal to unity.
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spelling Sirunyan, A. M.Silveira, Gustavo Gil daCMS Collaboration2019-06-27T02:36:19Z20191029-8479http://hdl.handle.net/10183/196330001093228A search for dark matter produced in association with top quarks in protonproton collisions at a center-of-mass energy of 13TeV is presented. The data set used corresponds to an integrated luminosity of 35.9 fb1 recorded with the CMS detector at the LHC. Whereas previous searches for neutral scalar or pseudoscalar mediators considered dark matter production in association with a top quark pair only, this analysis also includes production modes with a single top quark. The results are derived from the combination of multiple selection categories that are de ned to target either the single top quark or the top quark pair signature. No signi cant deviations with respect to the standard model predictions are observed. The results are interpreted in the context of a simpli ed model in which a scalar or pseudoscalar mediator particle couples to a top quark and subsequently decays into dark matter particles. Scalar and pseudoscalar mediator particles with masses below 290 and 300 GeV, respectively, are excluded at 95% con dence level, assuming a dark matter particle mass of 1 GeV and mediator couplings to fermions and dark matter particles equal to unity.application/pdfengThe journal of high energy physics. Trieste. No. 3 (Mar. 2019), 141, 44 p.Aceleradores de partículasColisões proton-protonMatéria escuraDark matterHadron-Hadron scattering (experiments)Top physicsSearch for dark matter produced in association with a single top quark or a top quark pair 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:UFRGSTEXT001093228.pdf.txt001093228.pdf.txtExtracted Texttext/plain117298http://www.lume.ufrgs.br/bitstream/10183/196330/2/001093228.pdf.txtf02d547ce22abebb9b616b1b9b0044ceMD52ORIGINAL001093228.pdfTexto completo (inglês)application/pdf701038http://www.lume.ufrgs.br/bitstream/10183/196330/1/001093228.pdf4600eeb03e9bfea5dd12be4c9cc79882MD5110183/1963302023-08-03 03:33:57.202334oai:www.lume.ufrgs.br:10183/196330Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-08-03T06:33:57Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Search for dark matter produced in association with a single top quark or a top quark pair in proton-proton collisions at √s = 13 TeV
title Search for dark matter produced in association with a single top quark or a top quark pair in proton-proton collisions at √s = 13 TeV
spellingShingle Search for dark matter produced in association with a single top quark or a top quark pair in proton-proton collisions at √s = 13 TeV
Sirunyan, A. M.
Aceleradores de partículas
Colisões proton-proton
Matéria escura
Dark matter
Hadron-Hadron scattering (experiments)
Top physics
title_short Search for dark matter produced in association with a single top quark or a top quark pair in proton-proton collisions at √s = 13 TeV
title_full Search for dark matter produced in association with a single top quark or a top quark pair in proton-proton collisions at √s = 13 TeV
title_fullStr Search for dark matter produced in association with a single top quark or a top quark pair in proton-proton collisions at √s = 13 TeV
title_full_unstemmed Search for dark matter produced in association with a single top quark or a top quark pair in proton-proton collisions at √s = 13 TeV
title_sort Search for dark matter produced in association with a single top quark or a top quark pair in proton-proton 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
Matéria escura
topic Aceleradores de partículas
Colisões proton-proton
Matéria escura
Dark matter
Hadron-Hadron scattering (experiments)
Top physics
dc.subject.eng.fl_str_mv Dark matter
Hadron-Hadron scattering (experiments)
Top physics
description A search for dark matter produced in association with top quarks in protonproton collisions at a center-of-mass energy of 13TeV is presented. The data set used corresponds to an integrated luminosity of 35.9 fb1 recorded with the CMS detector at the LHC. Whereas previous searches for neutral scalar or pseudoscalar mediators considered dark matter production in association with a top quark pair only, this analysis also includes production modes with a single top quark. The results are derived from the combination of multiple selection categories that are de ned to target either the single top quark or the top quark pair signature. No signi cant deviations with respect to the standard model predictions are observed. The results are interpreted in the context of a simpli ed model in which a scalar or pseudoscalar mediator particle couples to a top quark and subsequently decays into dark matter particles. Scalar and pseudoscalar mediator particles with masses below 290 and 300 GeV, respectively, are excluded at 95% con dence level, assuming a dark matter particle mass of 1 GeV and mediator couplings to fermions and dark matter particles equal to unity.
publishDate 2019
dc.date.accessioned.fl_str_mv 2019-06-27T02:36:19Z
dc.date.issued.fl_str_mv 2019
dc.type.driver.fl_str_mv Estrangeiro
info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/196330
dc.identifier.issn.pt_BR.fl_str_mv 1029-8479
dc.identifier.nrb.pt_BR.fl_str_mv 001093228
identifier_str_mv 1029-8479
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url http://hdl.handle.net/10183/196330
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. 3 (Mar. 2019), 141, 44 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
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reponame_str Repositório Institucional da UFRGS
collection Repositório Institucional da UFRGS
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