Speaker
Jonathan Kozaczuk
(University of California, Santa Cruz)
Description
Last year saw the discovery of a Higgs boson at the LHC, with mass around 125 GeV, as well as a potential signal of dark matter annihilation in the Fermi-LAT data coming from the Galactic Center: a mono-chromatic gamma-ray line peaked at around 130 GeV. Both are difficult to explain in minimal supersymmetric models, but can be readily accommodated in the Next-to-MSSM (NMSSM). In this talk, I show that the regions of the NMSSM consistent with a 125 GeV Standard Model-like Higgs and a 130 GeV Fermi line are in fact also well-suited for electroweak baryogenesis. In particular, such regions can accommodate a strongly first-order electroweak phase transition (due to the singlet contribution to the effective potential) without a light stop. Simultaneously, CP-violation from a complex phase in the wino-higgsino sector can account for the observed baryon asymmetry through resonant sources at the electroweak phase transition, while satisfying current constraints from dark matter, collider, and electric dipole moment (EDM) experiments. Thus, the NMSSM framework can potentially explain the origins of both baryonic and dark matter components in the Universe. The tightness of the constraints we impose on this scenario makes it extraordinarily predictive, and conclusively testable in the near future by modest improvements in EDM and dark matter search experiments.
Primary author
Jonathan Kozaczuk
(University of California, Santa Cruz)
Co-authors
Carroll Wainwright
(U.C. Santa Cruz)
Stefano Profumo
(Unknown)
