Measurement of the cross section of top quark-antiquark pair production in association with a W boson in proton-proton collisions at √s = 13 TeV
dc.contributor.author | Tumasyan, Armen | pt_BR |
dc.contributor.author | Silveira, Gustavo Gil da | pt_BR |
dc.contributor.author | Bernardes, César Augusto | pt_BR |
dc.contributor.author | CMS Collaboration | pt_BR |
dc.date.accessioned | 2023-12-19T03:24:27Z | pt_BR |
dc.date.issued | 2023 | pt_BR |
dc.identifier.issn | 1029-8479 | pt_BR |
dc.identifier.uri | http://hdl.handle.net/10183/270340 | pt_BR |
dc.description.abstract | The production of a top quark-antiquark pair in association with a W boson (t¯tW) is measured in proton-proton collisions at a center-of-mass energy of 13 TeV. The analyzed data was recorded by the CMS experiment at the CERN LHC and corresponds to an integrated luminosity of 138 fb−1 . Events with two or three leptons (electrons and muons) and additional jets are selected. In events with two leptons, a multiclass neural network is used to distinguish between the signal and background processes. Events with three leptons are categorized based on the number of jets and of jets originating from b quark hadronization, and the lepton charges. The inclusive t¯tW production cross section in the full phase space is measured to be 868±40(stat)±51(syst)fb. The t¯tW+ and t¯tW− cross sections are also measured as 553±30(stat)±30(syst) and 343±26(stat)±25(syst)fb, respectively, and the corresponding ratio of the two cross sections is found to be 1.61 ± 0.15(stat) +0.07 −0.05(syst). The measured cross sections are larger than but consistent with the standard model predictions within two standard deviations, and represent the most precise measurement of these cross sections to date. | en |
dc.format.mimetype | application/pdf | pt_BR |
dc.language.iso | eng | pt_BR |
dc.relation.ispartof | The journal of high energy physics. Trieste. No. 7 (July 2023), 219, 53 p. | pt_BR |
dc.rights | Open Access | en |
dc.subject | Hadron-Hadron scattering | en |
dc.subject | Aceleradores de partículas | pt_BR |
dc.subject | Quarks | pt_BR |
dc.subject | Top Physics | en |
dc.subject | Colisões proton-proton | pt_BR |
dc.title | Measurement of the cross section of top quark-antiquark pair production in association with a W boson in proton-proton collisions at √s = 13 TeV | pt_BR |
dc.type | Artigo de periódico | pt_BR |
dc.identifier.nrb | 001186723 | pt_BR |
dc.type.origin | Estrangeiro | pt_BR |
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