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Author: search.filters.author.Chistov,R.Subject: search.filters.subject.[No Keyword Available]

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  • Article
    Citation - WoS: 20
    Citation - Scopus: 29
    Measurement of the Top Quark Yukawa Coupling From Tt¯ Kinematic Distributions in the Dilepton Final State in Proton-Proton Collisions at S=13 Tev
    (American Physical Society, 2020) Sirunyan,A.M.; Tumasyan,A.; Adam,W.; Ambrogi,F.; Bergauer,T.; Dragicevic,M.; Chistov,R.
    A measurement of the Higgs boson Yukawa coupling to the top quark is presented using proton-proton collision data at s=13 TeV, corresponding to an integrated luminosity of 137 fb-1, recorded with the CMS detector. The coupling strength with respect to the standard model value, Yt, is determined from kinematic distributions in tt¯ final states containing ee, μμ, or eμ pairs. Variations of the Yukawa coupling strength lead to modified distributions for tt¯ production. In particular, the distributions of the mass of the tt¯ system and the rapidity difference of the top quark and antiquark are sensitive to the value of Yt. The measurement yields a best fit value of Yt=1.16-0.35+0.24, bounding Yt<1.54 at a 95% confidence level. © 2020 CERN.