Publication:
Observation of Single Top Quark Production in Association with a Z Boson in Proton-Proton Collisions at root s=13 TeV

Файлы
PhysRevLett.122.132003.pdf(387.6 KB)
Дата
2019
Авторы
Sirunyan, A. M.
Tumasyan, A.
Adam, W.
Ambrogi, F.
Matveev, V.
Chistov, R.
Danilov, M.
Parygin, P.
Tarkovskii, E.
Dremin, I.
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Организационная единица
Институт ядерной физики и технологий
Цель ИЯФиТ и стратегия развития - создание и развитие научно-образовательного центра мирового уровня в области ядерной физики и технологий, радиационного материаловедения, физики элементарных частиц, астрофизики и космофизики.
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Аннотация
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 sigma(pp -> tZq -> tl(+) l(-) q) = 111 +/- 13 (stat)(-9)(+11) (syst) fb, for dilepton invariant masses above 30 GeV, in agreement with the standard model expectation.
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Observation of Single Top Quark Production in Association with a Z Boson in Proton-Proton Collisions at root s=13 TeV / Sirunyan, AM [et al.] // Physical Review Letters. - 2019. - 122. - № 13. - 10.1103/PhysRevLett.122.132003
URI
https://www.doi.org/10.1103/PhysRevLett.122.132003
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85064398210&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000463901800006
 https://openrepository.mephi.ru/handle/123456789/16863
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