Measurement of the top quark pair production cross section in dilepton final states containing one τ lepton in pp collisions at √s = 13 TeV; Journal of High Energy Physics; Vol. 2020, iss. 2

Measurement of the top quark pair production cross section in dilepton final states containing one τ lepton in pp collisions at √s = 13 TeV; Journal of High Energy Physics; Vol. 2020, iss. 2

Bibliografiske detaljer
Parent link:Journal of High Energy Physics
Vol. 2020, iss. 2.— 2020.— [191, 40 p.]
Institution som forfatter: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов
Andre forfattere: Sirunyan A. M., Tumasyan A. R., Adam W. Wolfgang, Ambrogi F. Federico, Tyurin N. E. Nikolay Evgenjevich, Babaev A. A. Anton Anatoljevich
Summary:Title screen
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 σtt¯σtt¯ = 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 tt¯tt¯ 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/llRℓτh/ll = 0.973 ± 0.009 (stat) ± 0.066 (syst), consistent with lepton universality.
Sprog:engelsk
Udgivet: 2020
Fag:
электронный ресурс
труды учёных ТПУ
Hadron-Hadron scattering (experiments)
Top physics
Online adgang:https://doi.org/10.1007/JHEP02(2020)191
Format: Electronisk Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=666285

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