Measurement of top quark pair production in association with a Z boson in proton-proton collisions at √s = 13 TeV
Autor(a) principal: | |
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Data de Publicação: | 2020 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/211670 |
Resumo: | A measurement of the inclusive cross section of top quark pair production in association with a Z boson using proton-proton collisions at a center-of-mass energy of 13TeV at the LHC is performed. The data sample corresponds to an integrated luminosity of 77.5fb−1, collected by the CMS experiment during 2016 and 2017. The measurement is performed using final states containing three or four charged leptons (electrons or muons), and the Z boson is detected through its decay to an oppositely charged lepton pair. The production cross section is measured to be σ(ttZ) = 0.95±0.05(stat)±0.06(syst)pb. For the first time, differential cross sections are measured as functions of the transverse momentum of the Z boson and the angular distribution of the negatively charged lepton from the Z boson decay. The most stringent direct limits to date on the anomalous couplings of the top quark to the Z boson are presented, including constraints on the Wilson coefficients in the framework of the standard model effective field theory. |
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Sirunyan, A. M.Silveira, Gustavo Gil daCMS Collaboration2020-07-10T03:41:32Z20201029-8479http://hdl.handle.net/10183/211670001115018A measurement of the inclusive cross section of top quark pair production in association with a Z boson using proton-proton collisions at a center-of-mass energy of 13TeV at the LHC is performed. The data sample corresponds to an integrated luminosity of 77.5fb−1, collected by the CMS experiment during 2016 and 2017. The measurement is performed using final states containing three or four charged leptons (electrons or muons), and the Z boson is detected through its decay to an oppositely charged lepton pair. The production cross section is measured to be σ(ttZ) = 0.95±0.05(stat)±0.06(syst)pb. For the first time, differential cross sections are measured as functions of the transverse momentum of the Z boson and the angular distribution of the negatively charged lepton from the Z boson decay. The most stringent direct limits to date on the anomalous couplings of the top quark to the Z boson are presented, including constraints on the Wilson coefficients in the framework of the standard model effective field theory.application/pdfengThe journal of high energy physics. Trieste. No. 3 (Mar. 2020), 56, 50 p.Aceleradores de partículasColisões proton-protonBosons ZHadron-Hadron scattering (experiments)Top physicsMeasurement of top quark pair production in association with a Z boson 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:UFRGSTEXT001115018.pdf.txt001115018.pdf.txtExtracted Texttext/plain126574http://www.lume.ufrgs.br/bitstream/10183/211670/2/001115018.pdf.txte177e9e69e7b45141edcb54886dd8e77MD52ORIGINAL001115018.pdfTexto completo (inglês)application/pdf4646159http://www.lume.ufrgs.br/bitstream/10183/211670/1/001115018.pdf528c69ea81f06a852867a141d6fb9985MD5110183/2116702023-07-22 03:40:24.298697oai:www.lume.ufrgs.br:10183/211670Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2023-07-22T06:40:24Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Measurement of top quark pair production in association with a Z boson in proton-proton collisions at √s = 13 TeV |
title |
Measurement of top quark pair production in association with a Z boson in proton-proton collisions at √s = 13 TeV |
spellingShingle |
Measurement of top quark pair production in association with a Z boson in proton-proton collisions at √s = 13 TeV Sirunyan, A. M. Aceleradores de partículas Colisões proton-proton Bosons Z Hadron-Hadron scattering (experiments) Top physics |
title_short |
Measurement of top quark pair production in association with a Z boson in proton-proton collisions at √s = 13 TeV |
title_full |
Measurement of top quark pair production in association with a Z boson in proton-proton collisions at √s = 13 TeV |
title_fullStr |
Measurement of top quark pair production in association with a Z boson in proton-proton collisions at √s = 13 TeV |
title_full_unstemmed |
Measurement of top quark pair production in association with a Z boson in proton-proton collisions at √s = 13 TeV |
title_sort |
Measurement of top quark pair production in association with a Z boson 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 Z |
topic |
Aceleradores de partículas Colisões proton-proton Bosons Z Hadron-Hadron scattering (experiments) Top physics |
dc.subject.eng.fl_str_mv |
Hadron-Hadron scattering (experiments) Top physics |
description |
A measurement of the inclusive cross section of top quark pair production in association with a Z boson using proton-proton collisions at a center-of-mass energy of 13TeV at the LHC is performed. The data sample corresponds to an integrated luminosity of 77.5fb−1, collected by the CMS experiment during 2016 and 2017. The measurement is performed using final states containing three or four charged leptons (electrons or muons), and the Z boson is detected through its decay to an oppositely charged lepton pair. The production cross section is measured to be σ(ttZ) = 0.95±0.05(stat)±0.06(syst)pb. For the first time, differential cross sections are measured as functions of the transverse momentum of the Z boson and the angular distribution of the negatively charged lepton from the Z boson decay. The most stringent direct limits to date on the anomalous couplings of the top quark to the Z boson are presented, including constraints on the Wilson coefficients in the framework of the standard model effective field theory. |
publishDate |
2020 |
dc.date.accessioned.fl_str_mv |
2020-07-10T03:41:32Z |
dc.date.issued.fl_str_mv |
2020 |
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/10183/211670 |
dc.identifier.issn.pt_BR.fl_str_mv |
1029-8479 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001115018 |
identifier_str_mv |
1029-8479 001115018 |
url |
http://hdl.handle.net/10183/211670 |
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. 2020), 56, 50 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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