par Sirunyan, A.M.;Beghin, Diego
;Bilin, Bugra
;Brun, Hugues
;Clerbaux, Barbara
;De Lentdecker, Gilles
;Delannoy, Hugo
;Dorney, Brian
;Favart, Laurent
;Grebenyuk, Anastasia
;Kalsi, Amandeep Kaur
;Popov, Andrey
;Postiau, Nicolas
;Starling, Elizabeth Rose
;Lenzi, Thomas
;Vander Velde, Catherine
;Vanlaer, Pascal
;Vannerom, David
;Malara, Andrea
; [et al.]
Référence The Journal of high energy physics, 2020, 2, 191
Publication Publié, 2020-02-01
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Référence The Journal of high energy physics, 2020, 2, 191
Publication Publié, 2020-02-01
Article révisé par les pairs
Résumé : | The cross section of top quark pair production is measured in the tt¯→(ℓνℓ)(τhντ)bb¯ final state, where τh refers to the hadronic decays of the τ lepton, and ℓ 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 σt t ¯ = 781 ± 7 (stat) ± 62 (syst) ± 20 (lumi) pb, and the ratio of the partial width Γ(t → τντb) 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 t t ¯ production cross section in proton-proton collisions at s = 13 TeV that explicitly includes τ leptons. The ratio of the cross sections in the ℓτh and ℓℓ final states yields a value Rℓτh/ll = 0.973 ± 0.009 (stat) ± 0.066 (syst), consistent with lepton universality. [Figure not available: see fulltext.] |