Probing Higgs boson couplings in H+$\gamma$ production at the LHC

Understand

In this paper, we examine the potential of Higgs boson production associated with a photon at the LHC to probe the new physics effects in the framework of the standard model effective field theory.

• It is shown that the differential kinematic distributions such as photon transverse momentum and invariant mass of Higgs+$\gamma$ in Higgs associated production are powerful variables to explore the coefficients of dimension six operators.
• The analysis is performed in the decay channel of Higgs boson into a $b\bar{b}$ pair including the main sources of background processes and a realistic simulation of the detector effects.
• We provide constraints at $95\%$ confidence level on the Wilson coefficients of dimension-six operators affecting Higgs boson plus a photon production.