Observation of Single Top Quark Production in Association with a Z Boson in Proton-Proton Collisions at √s=13  TeV; Physical Review Letters; Vol. 122, iss. 13

Observation of Single Top Quark Production in Association with a Z Boson in Proton-Proton Collisions at √s=13  TeV; Physical Review Letters; Vol. 122, iss. 13

Bibliografiske detaljer
Parent link:Physical Review Letters
Vol. 122, iss. 13.— 2019.— [132003, 19 p.]
Corporate Authors: Национальный исследовательский Томский политехнический университет Исследовательская школа физики высокоэнергетических процессов, Национальный исследовательский Томский политехнический университет Инженерная школа новых производственных технологий Научно-производственная лаборатория "Импульсно-пучковых, электроразрядных и плазменных технологий"
Andre forfattere: Sirunyan A. M., Tumasyan A. R., Adam W. Wolfgang, Ambrogi F. Federico, Asilar E. Ece, Bergauer T. Thomas, Babaev A. A. Anton Anatoljevich, Yuzhakov A. D. Aleksandr Dmitrievich, Okhotnikov V. V. Vitaly Vladimirovich
Summary:Title screen
The observation of single top quark production in association with a Z boson and a quark (tZq) is reported. Events from proton-proton collisions at a center-of-mass energy of 13 TeV containing three charged leptons (either electrons or muons) and at least two jets are analyzed. The data were collected with the CMS detector in 2016 and 2017 and correspond to an integrated luminosity of 77.4fb−1. The increased integrated luminosity, a multivariate lepton identification, and a redesigned analysis strategy improve significantly the sensitivity of the analysis compared to previous searches for tZq production. The tZq signal is observed with a significance well over 5 standard deviations. The measured tZq production cross section is σ(pp→tZq→tℓ+ℓ−q)=111±13(stat)+11−9(syst)  fb, for dilepton invariant masses above 30 GeV, in agreement with the standard model expectation.
Режим доступа: по договору с организацией-держателем ресурса
Sprog:engelsk
Udgivet: 2019
Fag:
электронный ресурс
труды учёных ТПУ
протон-протонные соударения
бозоны
кварки
Online adgang:https://doi.org/10.1103/PhysRevLett.122.132003
Format: Electronisk Book Chapter
KOHA link:https://koha.lib.tpu.ru/cgi-bin/koha/opac-detail.pl?biblionumber=662623

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