Cornering the SMEFT Interactions of Higgs Through Higgs-Photon Production at the LHC

The Standard Model Effective Field Theory (SMEFT) is a useful framework to study indirect deviations, for new non-resonant physics effects at the LHC. We explore the production of the Higgs boson+photon from pp collisions, hitherto unobserved at the LHC in the boosted regime in the SMEFT framework. By studying the admissible dimension-6 operators, we identify kinematic regions distributed in the phase space where new physics events are prominent. Our analysis focuses on the sensitivity of these interactions at the 14 TeV HL-LHC. We highlight the utility of multivariate analysis and jet-substructure observables in facilitating the isolation of contributions from new interactions. We briefly discuss the interpretation of allowed values for the operator coefficients with a UV complete model, namely the MSSM.