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Abstract: The cross section of top quark pair production is measured in the tt¯?(???)(?h??)bb¯ final state, where ?h refers to the hadronic decays of the ? lepton, and ? is either an electron or a muon. The data sample corresponds to an integrated luminosity of 35.9 fb?1 collected in proton-proton collisions at ?s = 13 TeV with the CMS detector. The measured cross section is ?tt¯ = 781 ± 7 (stat) ± 62 (syst) ± 20 (lumi) pb, and the ratio of the partial width ?(t ? ???b) to the total decay width of the top quark is measured to be 0.1050 ± 0.0009 (stat) ± 0.0071 (syst). This is the first measurement of the tt¯tt¯ production cross section in proton-proton collisions at ?s = 13 TeV that explicitly includes ? leptons. The ratio of the cross sections in the ??h and ?? final states yields a value R??h/ll = 0.973 ± 0.009 (stat) ± 0.066 (syst), consistent with lepton universality.
Fuente: Journal of High Energy Physics, Vol. 2020, Num. 02, Art. Num. 191
Publisher: Springer Verlag
Publication date: 01/02/2020
No. of pages: 41
Publication type: Article
DOI: 10.1007/JHEP02(2020)191
ISSN: 1126-6708,1029-8479
Publication Url: https://doi.org/10.1007/JHEP02(2020)191
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SIRUNYAN, A. M.
JOSE IBAN CABRILLO BARTOLOME
ALICIA CALDERON TAZON
BARBARA CHAZIN QUERO
JORGE DUARTE CAMPDERROS
MARCOS FERNANDEZ GARCIA
PEDRO JOSE FERNANDEZ MANTECA
ANDREA GARCIA ALONSO
GERVASIO GOMEZ GRAMUGLIO
CELSO MARTINEZ RIVERO
PABLO MARTINEZ RUIZ DEL ARBOL
FRANCISCO MATORRAS WEINIG
JONATAN PIEDRA GOMEZ
CEDRIC GERALD PRIEELS
MARIA TERESA RODRIGO ANORO
ALBERTO RUIZ JIMENO
LORENZO RUSSO
LUCA SCODELLARO
IVAN VILA ALVAREZ
JESUS MANUEL VIZAN GARCIA
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