Combination of inclusive top-quark pair production cross-section measurements using ATLAS and CMS data at √s = 7 and 8 TeV
Autor(a) principal: | |
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Data de Publicação: | 2023 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UFRGS |
Texto Completo: | http://hdl.handle.net/10183/270888 |
Resumo: | A combination of measurements of the inclusive top-quark pair production cross-section performed by ATLAS and CMS in proton–proton collisions at centre-of-mass energies of 7 and 8 TeV at the LHC is presented. The cross-sections are obtained using topquark pair decays with an opposite-charge electron–muon pair in the final state and with data corresponding to an integrated luminosity of about 5 fb−1 at √ s = 7 TeV and about 20 fb−1 at √ s = 8 TeV for each experiment. The combined cross-sections are determined to be 178.5 ± 4.7 pb at √ s = 7 TeV and 243.3 +6.0 −5.9 pb at √ s = 8 TeV with a correlation of 0.41, using a reference top-quark mass value of 172.5 GeV. The ratio of the combined crosssections is determined to be R8/7 = 1.363 ± 0.032. The combined measured cross-sections and their ratio agree well with theory calculations using several parton distribution function (PDF) sets. The values of the top-quark pole mass (with the strong coupling fixed at 0.118) and the strong coupling (with the top-quark pole mass fixed at 172.5 GeV) are extracted from the combined results by fitting a next-to-next-to-leading-order plus next-to-next-toleading-log QCD prediction to the measurements. Using a version of the NNPDF3.1 PDF set containing no top-quark measurements, the results obtained are m pole t = 173.4 +1.8 −2.0 GeV and αs(mZ) = 0.1170+0.0021 −0.0018. |
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Aad, GeorgesSilveira, Gustavo Gil daBernardes, César AugustoATLAS CollaborationCMS Collaboration2024-01-12T03:28:24Z20231029-8479http://hdl.handle.net/10183/270888001193667A combination of measurements of the inclusive top-quark pair production cross-section performed by ATLAS and CMS in proton–proton collisions at centre-of-mass energies of 7 and 8 TeV at the LHC is presented. The cross-sections are obtained using topquark pair decays with an opposite-charge electron–muon pair in the final state and with data corresponding to an integrated luminosity of about 5 fb−1 at √ s = 7 TeV and about 20 fb−1 at √ s = 8 TeV for each experiment. The combined cross-sections are determined to be 178.5 ± 4.7 pb at √ s = 7 TeV and 243.3 +6.0 −5.9 pb at √ s = 8 TeV with a correlation of 0.41, using a reference top-quark mass value of 172.5 GeV. The ratio of the combined crosssections is determined to be R8/7 = 1.363 ± 0.032. The combined measured cross-sections and their ratio agree well with theory calculations using several parton distribution function (PDF) sets. The values of the top-quark pole mass (with the strong coupling fixed at 0.118) and the strong coupling (with the top-quark pole mass fixed at 172.5 GeV) are extracted from the combined results by fitting a next-to-next-to-leading-order plus next-to-next-toleading-log QCD prediction to the measurements. Using a version of the NNPDF3.1 PDF set containing no top-quark measurements, the results obtained are m pole t = 173.4 +1.8 −2.0 GeV and αs(mZ) = 0.1170+0.0021 −0.0018.application/pdfengThe journal of high energy physics. Trieste. No. 7 (July 2023), 213, 63 p.Aceleradores de partículasHadronsColisões proton-protonHadron-Hadron scatteringTop PhysicsCombination of inclusive top-quark pair production cross-section measurements using ATLAS and CMS data at √s = 7 and 8 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:UFRGSTEXT001193667.pdf.txt001193667.pdf.txtExtracted Texttext/plain187201http://www.lume.ufrgs.br/bitstream/10183/270888/2/001193667.pdf.txt0af02e8f4b8425c919e096976da5417cMD52ORIGINAL001193667.pdfTexto completo (inglês)application/pdf1912145http://www.lume.ufrgs.br/bitstream/10183/270888/1/001193667.pdfb85eda0efaf1b004c9d884fb7f728a92MD5110183/2708882024-01-13 04:41:00.101348oai:www.lume.ufrgs.br:10183/270888Repositório de PublicaçõesPUBhttps://lume.ufrgs.br/oai/requestopendoar:2024-01-13T06:41Repositório Institucional da UFRGS - Universidade Federal do Rio Grande do Sul (UFRGS)false |
dc.title.pt_BR.fl_str_mv |
Combination of inclusive top-quark pair production cross-section measurements using ATLAS and CMS data at √s = 7 and 8 TeV |
title |
Combination of inclusive top-quark pair production cross-section measurements using ATLAS and CMS data at √s = 7 and 8 TeV |
spellingShingle |
Combination of inclusive top-quark pair production cross-section measurements using ATLAS and CMS data at √s = 7 and 8 TeV Aad, Georges Aceleradores de partículas Hadrons Colisões proton-proton Hadron-Hadron scattering Top Physics |
title_short |
Combination of inclusive top-quark pair production cross-section measurements using ATLAS and CMS data at √s = 7 and 8 TeV |
title_full |
Combination of inclusive top-quark pair production cross-section measurements using ATLAS and CMS data at √s = 7 and 8 TeV |
title_fullStr |
Combination of inclusive top-quark pair production cross-section measurements using ATLAS and CMS data at √s = 7 and 8 TeV |
title_full_unstemmed |
Combination of inclusive top-quark pair production cross-section measurements using ATLAS and CMS data at √s = 7 and 8 TeV |
title_sort |
Combination of inclusive top-quark pair production cross-section measurements using ATLAS and CMS data at √s = 7 and 8 TeV |
author |
Aad, Georges |
author_facet |
Aad, Georges Silveira, Gustavo Gil da Bernardes, César Augusto ATLAS Collaboration CMS Collaboration |
author_role |
author |
author2 |
Silveira, Gustavo Gil da Bernardes, César Augusto ATLAS Collaboration CMS Collaboration |
author2_role |
author author author author |
dc.contributor.author.fl_str_mv |
Aad, Georges Silveira, Gustavo Gil da Bernardes, César Augusto ATLAS Collaboration CMS Collaboration |
dc.subject.por.fl_str_mv |
Aceleradores de partículas Hadrons Colisões proton-proton |
topic |
Aceleradores de partículas Hadrons Colisões proton-proton Hadron-Hadron scattering Top Physics |
dc.subject.eng.fl_str_mv |
Hadron-Hadron scattering Top Physics |
description |
A combination of measurements of the inclusive top-quark pair production cross-section performed by ATLAS and CMS in proton–proton collisions at centre-of-mass energies of 7 and 8 TeV at the LHC is presented. The cross-sections are obtained using topquark pair decays with an opposite-charge electron–muon pair in the final state and with data corresponding to an integrated luminosity of about 5 fb−1 at √ s = 7 TeV and about 20 fb−1 at √ s = 8 TeV for each experiment. The combined cross-sections are determined to be 178.5 ± 4.7 pb at √ s = 7 TeV and 243.3 +6.0 −5.9 pb at √ s = 8 TeV with a correlation of 0.41, using a reference top-quark mass value of 172.5 GeV. The ratio of the combined crosssections is determined to be R8/7 = 1.363 ± 0.032. The combined measured cross-sections and their ratio agree well with theory calculations using several parton distribution function (PDF) sets. The values of the top-quark pole mass (with the strong coupling fixed at 0.118) and the strong coupling (with the top-quark pole mass fixed at 172.5 GeV) are extracted from the combined results by fitting a next-to-next-to-leading-order plus next-to-next-toleading-log QCD prediction to the measurements. Using a version of the NNPDF3.1 PDF set containing no top-quark measurements, the results obtained are m pole t = 173.4 +1.8 −2.0 GeV and αs(mZ) = 0.1170+0.0021 −0.0018. |
publishDate |
2023 |
dc.date.issued.fl_str_mv |
2023 |
dc.date.accessioned.fl_str_mv |
2024-01-12T03:28:24Z |
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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article |
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publishedVersion |
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http://hdl.handle.net/10183/270888 |
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1029-8479 |
dc.identifier.nrb.pt_BR.fl_str_mv |
001193667 |
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1029-8479 001193667 |
url |
http://hdl.handle.net/10183/270888 |
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. 7 (July 2023), 213, 63 p. |
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info:eu-repo/semantics/openAccess |
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openAccess |
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