Singlino-driven Electroweak Baryogenesis in the Next-to-MSSM
  We explore a new possibility of electroweak baryogenesis in the next-to-minimal supersymmetric standard model. In this model, a strong first-order electroweak phase transition can be achieved due to the additional singlet Higgs field. The new impact of its superpartner (singlino) on the baryon asymmetry is investigated by employing the closed-time-path formalism. We find that the CP violating source term fueled by the singlino could be large enough to generate the observed baryon asymmetry of the Universe without any conflicts with the current constraints from the non-observation of the Thallium, neutron and Mercury electric dipole moments. 
Kingman Cheung, Tie-Jiun Hou, Jae Sik Lee, Eibun Senaha
hep-ph hep-ex