Search for tt¯H production in the H → bb¯ decay channel with leptonic t t decays in proton-proton collisions at √s = 13 TeV
Autor(a) principal: | |
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Data de Publicação: | 2019 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/196326 |
Resumo: | A search is presented for the associated production of a standard model Higgs boson with a top quark-antiquark pair (t tH), in which the Higgs boson decays into a b quark-antiquark pair, in proton-proton collisions at a centre-of-mass energy p s = 13TeV. The data correspond to an integrated luminosity of 35.9 fb1 recorded with the CMS detector at the CERN LHC. Candidate t tH events are selected that contain either one or two electrons or muons from the t t decays and are categorised according to the number of jets. Multivariate techniques are employed to further classify the events and eventually discriminate between signal and background. The results are characterised by an observed t tH signal strength relative to the standard model cross section, = = SM, under the assumption of a Higgs boson mass of 125 GeV. A combined t of multivariate discriminant distributions in all categories results in an observed (expected) upper limit on of 1.5 (0.9) at 95% con dence level, and a best t value of 0:72 0:24(stat) 0:38(syst), corresponding to an observed (expected) signal signi cance of 1.6 (2.2) standard deviations above the background-only hypothesis. |
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Sirunyan, A. M.Silveira, Gustavo Gil daCMS Collaboration2019-06-27T02:36:14Z20191029-8479http://hdl.handle.net/10183/196326001092249A search is presented for the associated production of a standard model Higgs boson with a top quark-antiquark pair (t tH), in which the Higgs boson decays into a b quark-antiquark pair, in proton-proton collisions at a centre-of-mass energy p s = 13TeV. The data correspond to an integrated luminosity of 35.9 fb1 recorded with the CMS detector at the CERN LHC. Candidate t tH events are selected that contain either one or two electrons or muons from the t t decays and are categorised according to the number of jets. Multivariate techniques are employed to further classify the events and eventually discriminate between signal and background. The results are characterised by an observed t tH signal strength relative to the standard model cross section, = = SM, under the assumption of a Higgs boson mass of 125 GeV. A combined t of multivariate discriminant distributions in all categories results in an observed (expected) upper limit on of 1.5 (0.9) at 95% con dence level, and a best t value of 0:72 0:24(stat) 0:38(syst), corresponding to an observed (expected) signal signi cance of 1.6 (2.2) standard deviations above the background-only hypothesis.application/pdfengThe journal of high energy physics. Trieste. No. 3 (Mar. 2019), 026, 61 p.Aceleradores de partículasColisões proton-protonBosons de higgsHadron-Hadron scattering (experiments)Higgs physicsTop physicsSearch for tt¯H production in the H → bb¯ decay channel with leptonic t t decays 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:UFRGSTEXT001092249.pdf.txt001092249.pdf.txtExtracted Texttext/plain160876http://www.lume.ufrgs.br/bitstream/10183/196326/2/001092249.pdf.txt9bfb976c49377aa84dbf2a32777bca95MD52ORIGINAL001092249.pdfTexto completo (inglês)application/pdf1408134http://www.lume.ufrgs.br/bitstream/10183/196326/1/001092249.pdfee1735acd8e181628bea44decc716d63MD5110183/1963262023-08-03 03:33:22.770562oai:www.lume.ufrgs.br:10183/196326Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-08-03T06:33:22Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Search for tt¯H production in the H → bb¯ decay channel with leptonic t t decays in proton-proton collisions at √s = 13 TeV |
title |
Search for tt¯H production in the H → bb¯ decay channel with leptonic t t decays in proton-proton collisions at √s = 13 TeV |
spellingShingle |
Search for tt¯H production in the H → bb¯ decay channel with leptonic t t decays in proton-proton collisions at √s = 13 TeV Sirunyan, A. M. Aceleradores de partículas Colisões proton-proton Bosons de higgs Hadron-Hadron scattering (experiments) Higgs physics Top physics |
title_short |
Search for tt¯H production in the H → bb¯ decay channel with leptonic t t decays in proton-proton collisions at √s = 13 TeV |
title_full |
Search for tt¯H production in the H → bb¯ decay channel with leptonic t t decays in proton-proton collisions at √s = 13 TeV |
title_fullStr |
Search for tt¯H production in the H → bb¯ decay channel with leptonic t t decays in proton-proton collisions at √s = 13 TeV |
title_full_unstemmed |
Search for tt¯H production in the H → bb¯ decay channel with leptonic t t decays in proton-proton collisions at √s = 13 TeV |
title_sort |
Search for tt¯H production in the H → bb¯ decay channel with leptonic t t decays 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 Bosons de higgs |
topic |
Aceleradores de partículas Colisões proton-proton Bosons de higgs Hadron-Hadron scattering (experiments) Higgs physics Top physics |
dc.subject.eng.fl_str_mv |
Hadron-Hadron scattering (experiments) Higgs physics Top physics |
description |
A search is presented for the associated production of a standard model Higgs boson with a top quark-antiquark pair (t tH), in which the Higgs boson decays into a b quark-antiquark pair, in proton-proton collisions at a centre-of-mass energy p s = 13TeV. The data correspond to an integrated luminosity of 35.9 fb1 recorded with the CMS detector at the CERN LHC. Candidate t tH events are selected that contain either one or two electrons or muons from the t t decays and are categorised according to the number of jets. Multivariate techniques are employed to further classify the events and eventually discriminate between signal and background. The results are characterised by an observed t tH signal strength relative to the standard model cross section, = = SM, under the assumption of a Higgs boson mass of 125 GeV. A combined t of multivariate discriminant distributions in all categories results in an observed (expected) upper limit on of 1.5 (0.9) at 95% con dence level, and a best t value of 0:72 0:24(stat) 0:38(syst), corresponding to an observed (expected) signal signi cance of 1.6 (2.2) standard deviations above the background-only hypothesis. |
publishDate |
2019 |
dc.date.accessioned.fl_str_mv |
2019-06-27T02:36:14Z |
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 |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10183/196326 |
dc.identifier.issn.pt_BR.fl_str_mv |
1029-8479 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001092249 |
identifier_str_mv |
1029-8479 001092249 |
url |
http://hdl.handle.net/10183/196326 |
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), 026, 61 p. |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
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application/pdf |
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reponame:Repositório Institucional da UFRGS instname:Universidade Federal do Rio Grande do Sul (UFRGS) instacron:UFRGS |
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UFRGS |
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Repositório Institucional da UFRGS |
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Repositório Institucional da UFRGS |
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