Global Constraints on CP Violation in the Higgs Sector

Charge-Parity (CP) symmetry violating contributions to Higgs--fermion couplings are absent in the standard model of particle physics, but are motivated by models of electroweak baryogenesis. In this talk, I will present results of a study of the constraints on these couplings from a combination of Large Hadron Collider data and experimental bounds on the electron, neutron, and mercury electric dipole moments (EDMs). While previous studies have focused on scenarios with CP-violation in the interaction of the Higgs with a single fermion species, using the GAMBIT software framework we have undertaken global fits that allow for the presence of CP-violating contributions from several fermion species, as could be expected in more realistic UV complete scenarios. I will show that allowing for these multiple CP-violating interactions can substantially relax previously presented constraints from EDMs.