CP violation with Higgs-dependent Yukawa couplings

TL;DR

This paper explores CP violation in models with Higgs-dependent Yukawa couplings, revealing conditions for CP violation and showing it can be significantly stronger than in the Standard Model, potentially enabling baryogenesis.

Contribution

It identifies weak basis invariants controlling CP violation in Higgs-dependent Yukawa models and quantifies the enhancement over the Standard Model.

Findings

CP violation measure exceeds Standard Model by over 10 orders of magnitude

Conditions for CP violation are characterized by weak basis invariants

Enhanced CP violation could support electroweak baryogenesis

Abstract

The framework of Higgs-dependent Yukawa couplings allows one to eliminate small couplings from the Standard Model, which can be tested at the LHC. In this work, I study the conditions for CP violation to occur in such models. I identify a class of weak basis invariants controlling CP violation. The invariant measure of CP violation is found to be more than 10 orders of magnitude greater than that in the Standard Model, which can be sufficient for successful electroweak baryogenesis.