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

(CMS Collaboration)

Research output: Contribution to journalArticlepeer-review

Abstract

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.

Original languageEnglish (US)
Article number092013
JournalPhysical Review D
Volume102
Issue number9
DOIs
StatePublished - Nov 30 2020

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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