Anomalous Higgs Yukawa Couplings and Recent LHC Data

Abstract

Very recently, the CMS collaboration has reported a search for the production for a Standard Model (SM) Higgs boson in association with a top quark pair ($tbartH$) at the LHC Run-2 and a best fit $tbartH$ yield of $1.5pm0.5$ times the SM prediction with an observed significance of $3.3sigma$. We study a possibility of whether or not this observed deviation can be explained by anomalous Higgs Yukawa couplings with the top and the bottom quarks, along with the LHC Run-1 data for the Higgs boson properties. We find that anomalous top and bottom Yukawa couplings with about $0-20$% and $10-40$% reductions from their SM values, respectively, can simultaneously fit the recent CMS result and the LHC Run-1 data.

Comments: 10 pages, 2 figures. arXiv admin note: substantial text overlap with arXiv:1604.01150, references added