Electroweak baryogenesis in R-symmetric supersymmetry

We demonstrate that electroweak baryogenesis can occur in a supersymmetric model with an exact R-symmetry. The minimal R-symmetric supersymmetric model contains chiral superfields in the adjoint representation, giving Dirac gaugino masses, and an additional set of "R-partner'' Higgs superfields, giving R-symmetric mu terms. New superpotential couplings between the adjoints and the Higgs fields can simultaneously increase the strength of the electroweak phase transition and provide additional tree-level contributions to the lightest Higgs mass. Notably, no light stop is present in this framework, and in fact, we require both stops to be above a few TeV to provide sufficient radiative corrections to the lightest Higgs mass to bring it up to 125 GeV. Large CP-violating phases in the gaugino/Higgsino sector allow us to match the baryon asymmetry of the Universe with no constraints from electric dipole moments owing to R symmetry. We briefly discuss some of the more interesting phenomenology, particularly of the lightest CP-odd scalar. DOI: 10.1103/PhysRevD.87.055018