Observation of t¯tH production

Detalhes bibliográficos
Autor(a) principal: Sirunyan, A. M.
Data de Publicação: 2018
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/10183/182926
Resumo: The observation of Higgs boson production in association with a top quark-antiquark pair is reported, based on a combined analysis of proton-proton collision data at center-of-mass energies of ffiffiffi s p ¼ 7, 8, and 13 TeV, corresponding to integrated luminosities of up to 5.1, 19.7, and 35.9 fb−1, respectively. The data were collected with the CMS detector at the CERN LHC. The results of statistically independent searches for Higgs bosons produced in conjunction with a top quark-antiquark pair and decaying to pairs of W bosons, Z bosons, photons, τ leptons, or bottom quark jets are combined to maximize sensitivity. An excess of events is observed, with a significance of 5.2 standard deviations, over the expectation from the background-only hypothesis. The corresponding expected significance from the standard model for a Higgs boson mass of 125.09 GeV is 4.2 standard deviations. The combined best fit signal strength normalized to the standard model prediction is 1.26 þ0.31 −0.26 .
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spelling Sirunyan, A. M.Silveira, Gustavo Gil daCMS Collaboration2018-09-28T02:35:03Z20180031-9007http://hdl.handle.net/10183/182926001072273The observation of Higgs boson production in association with a top quark-antiquark pair is reported, based on a combined analysis of proton-proton collision data at center-of-mass energies of ffiffiffi s p ¼ 7, 8, and 13 TeV, corresponding to integrated luminosities of up to 5.1, 19.7, and 35.9 fb−1, respectively. The data were collected with the CMS detector at the CERN LHC. The results of statistically independent searches for Higgs bosons produced in conjunction with a top quark-antiquark pair and decaying to pairs of W bosons, Z bosons, photons, τ leptons, or bottom quark jets are combined to maximize sensitivity. An excess of events is observed, with a significance of 5.2 standard deviations, over the expectation from the background-only hypothesis. The corresponding expected significance from the standard model for a Higgs boson mass of 125.09 GeV is 4.2 standard deviations. The combined best fit signal strength normalized to the standard model prediction is 1.26 þ0.31 −0.26 .application/pdfengPhysical review letters. Melville. Vol. 120, no. 23 (June 2018), 231801, 17 p.Bosons de higgsAceleradores de partículasColisões proton-protonObservation of t¯tH productionEstrangeiroinfo: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:UFRGSORIGINAL001072273.pdfTexto completo (inglês)application/pdf470030http://www.lume.ufrgs.br/bitstream/10183/182926/1/001072273.pdfbe242a71211ee4516c9b9d412594f632MD51TEXT001072273.pdf.txt001072273.pdf.txtExtracted Texttext/plain82280http://www.lume.ufrgs.br/bitstream/10183/182926/2/001072273.pdf.txt555b376a38e0a448072f5ded9d98f863MD52THUMBNAIL001072273.pdf.jpg001072273.pdf.jpgGenerated Thumbnailimage/jpeg1835http://www.lume.ufrgs.br/bitstream/10183/182926/3/001072273.pdf.jpg869b246bdb2b88602cd440d82501e131MD5310183/1829262023-08-05 03:39:44.49017oai:www.lume.ufrgs.br:10183/182926Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-08-05T06:39:44Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false
dc.title.pt_BR.fl_str_mv Observation of t¯tH production
title Observation of t¯tH production
spellingShingle Observation of t¯tH production
Sirunyan, A. M.
Bosons de higgs
Aceleradores de partículas
Colisões proton-proton
title_short Observation of t¯tH production
title_full Observation of t¯tH production
title_fullStr Observation of t¯tH production
title_full_unstemmed Observation of t¯tH production
title_sort Observation of t¯tH production
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 Bosons de higgs
Aceleradores de partículas
Colisões proton-proton
topic Bosons de higgs
Aceleradores de partículas
Colisões proton-proton
description The observation of Higgs boson production in association with a top quark-antiquark pair is reported, based on a combined analysis of proton-proton collision data at center-of-mass energies of ffiffiffi s p ¼ 7, 8, and 13 TeV, corresponding to integrated luminosities of up to 5.1, 19.7, and 35.9 fb−1, respectively. The data were collected with the CMS detector at the CERN LHC. The results of statistically independent searches for Higgs bosons produced in conjunction with a top quark-antiquark pair and decaying to pairs of W bosons, Z bosons, photons, τ leptons, or bottom quark jets are combined to maximize sensitivity. An excess of events is observed, with a significance of 5.2 standard deviations, over the expectation from the background-only hypothesis. The corresponding expected significance from the standard model for a Higgs boson mass of 125.09 GeV is 4.2 standard deviations. The combined best fit signal strength normalized to the standard model prediction is 1.26 þ0.31 −0.26 .
publishDate 2018
dc.date.accessioned.fl_str_mv 2018-09-28T02:35:03Z
dc.date.issued.fl_str_mv 2018
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dc.identifier.uri.fl_str_mv http://hdl.handle.net/10183/182926
dc.identifier.issn.pt_BR.fl_str_mv 0031-9007
dc.identifier.nrb.pt_BR.fl_str_mv 001072273
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dc.language.iso.fl_str_mv eng
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dc.relation.ispartof.pt_BR.fl_str_mv Physical review letters. Melville. Vol. 120, no. 23 (June 2018), 231801, 17 p.
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