Abstract
The latest results of searches for the standard model Higgs boson produced in association with a top quark-antiquark pair (tt̄H), where Higgs decays into photons, bottom quark-antiquark pair or leptons via WW, ZZ and ττ are presented. The analyses have been performed using the 13 TeV pp collisions data recorded by the CMS experiment in 2015 and part of 2016. The results are presented in the form of the best fit to the signal strength (μ = σ/σSM) measured with respect to the Standard Model prediction and its expected and observed 95% CL upper limits.
Highlights
Following the discovery of a Higgs boson at the LHC, exploring its properties such as production and decay rates, as well as its couplings with other Standard Model (SM) particles has become the main focus of interest
Out of the four main production mechanisms, this search focuses on the process which involves coupling of the Higgs boson to fermions
The final signal strength measurement is obtained combining the results of measurements in several Higgs decay channels: H → bb, H → WW∗, and H → τ+τ−, ZZ and γγ
Summary
Following the discovery of a Higgs boson at the LHC, exploring its properties such as production and decay rates, as well as its couplings with other Standard Model (SM) particles has become the main focus of interest. Direct measurement of top Yukawa coupling is performed in channels where Higgs is associated with tt pair or a single top quark. Since this particular channel has a small cross section comparing to gluon-gluon fusion, where this coupling cannot be measured directly, one can use the results obtained with direct measurement to put constrains on contributions from Beyond the Standard Model (BSM) processes
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