Electroweak Baryogenesis in a Scalar-Assisted Vector-Like Fermion Model

Understand

We extend the standard model to a scalar-assisted vector-like fermion model to realize electroweak baryogenesis.

• The extended Cabbibo-Kobayashi-Maskawa matrix, due to the mixing among the vector-like quark and the standard model quarks, provides additional sources of the CP violation.
• Together with the enhancement from large vector-like quark mass, a large enough baryon-to-photon ratio could be obtained.
• The strongly first-order phase transition could be realized via the potential barrier which separate the broken minimum and the symmetric minimum in the scalar potential.