Electroweak Baryogenesis in a Two-Higgs Doublet Model

TL;DR

This paper explores how a non-supersymmetric two-Higgs doublet model can achieve electroweak baryogenesis, addressing the limitations of the Standard Model by leveraging the top quark's role in phase transition dynamics.

Contribution

It demonstrates that non-supersymmetric two-Higgs doublet models can successfully generate the observed baryon asymmetry, highlighting the top quark's role in the process.

Findings

Successful baryogenesis in the two-Higgs doublet model

Implications for Higgs physics and electric dipole moment searches

Details of the phase transition mechanisms

Abstract

Electroweak baryogenesis fails in the SM because of too small CP violation and the lack of a strong first-order phase transition. It has been shown that supersymmetric models allow for successful baryogenesis, where the Higgsinos play an important role in the transport processes that generate the asymmetry. I will demonstrate that also non-supersymmetric models can provide the observed baryon asymmetry. The top quark takes the role of the Higgsinos. Focusing on the two-Higgs doublet model, I will discuss details of the phase transition and consequences for Higgs physics and EDM searches.