Measurement of the top quark Yukawa coupling from tt¯ kinematic distributions in the dilepton final state in proton-proton collisions at s=13??TeV

KAI-FENG CHENPAO-TI CHANGWEI-SHU HOU2021-07-282021-07-28202024700010https://www.scopus.com/inward/record.uri?eid=2-s2.0-85097184545&doi=10.1103%2fPhysRevD.102.092013&partnerID=40&md5=f5e5942396839a996e58a38a74462407https://scholars.lib.ntu.edu.tw/handle/123456789/573628A 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.Measurement of the top quark Yukawa coupling from tt¯ kinematic distributions in the dilepton final state in proton-proton collisions at s=13??TeVjournal article10.1103/PhysRevD.102.0920132-s2.0-85097184545