Publication:
Search for production of four top quarks in final states with same-sign or multiple leptons in proton–proton collisions at √s=13TeV

Дата
2020
Авторы
Sirunyan, A. M.
Tumasyan, A.
Adam, W.
Ambrogi, F.
Matveev, V.
Chadeeva, M.
Parygin, P.
Philippov, D.
Popova, E.
Rusinov, V.
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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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© 2020, CERN for the benefit of the CMS collaboration.The standard model (SM) production of four top quarks (t t ¯ t t ¯) in proton–proton collisions is studied by the CMS Collaboration. The data sample, collected during the 2016–2018 data taking of the LHC, corresponds to an integrated luminosity of 137fb-1 at a center-of-mass energy of 13TeV. The events are required to contain two same-sign charged leptons (electrons or muons) or at least three leptons, and jets. The observed and expected significances for the t t ¯ t t ¯ signal are respectively 2.6 and 2.7 standard deviations, and the t t ¯ t t ¯ cross section is measured to be 12.6-5.2+5.8fb. The results are used to constrain the Yukawa coupling of the top quark to the Higgs boson, yt, yielding a limit of |yt/ytSM|<1.7 at 95 % confidence level, where ytSM is the SM value of yt. They are also used to constrain the oblique parameter of the Higgs boson in an effective field theory framework, H
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Search for production of four top quarks in final states with same-sign or multiple leptons in proton–proton collisions at √s=13TeV / Sirunyan, A.M. [et al.] // European Physical Journal C. - 2020. - 80. - № 2. - 10.1140/epjc/s10052-019-7593-7
URI
https://www.doi.org/10.1140/epjc/s10052-019-7593-7
 https://www.scopus.com/record/display.uri?eid=2-s2.0-85078848913&origin=resultslist
 http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=Alerting&SrcApp=Alerting&DestApp=WOS_CPL&DestLinkType=FullRecord&UT=WOS:000513235800003
 https://openrepository.mephi.ru/handle/123456789/20215
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