Electroweak baryogenesis driven by extra top Yukawa couplings
Journal
Physics Letters B
Journal Volume
22
Journal Issue
3
Pages
402-406
Date Issued
2015
Author(s)
Abstract
We study electroweak baryogenesis driven by the top quark in a general two Higgs doublet model with flavor-changing Yukawa couplings, keeping the Higgs potential CP invariant. With Higgs sector couplings and the additional top Yukawa coupling ρtt all of O(1), one naturally has sizable CP violation that fuels the cosmic baryon asymmetry. Even if ρtt vanishes, the favor-changing coupling ρtc can still lead to successful baryogenesis. Phenomenological consequences such as t→ch, τ→μγ electron electric dipole moment, h→γγ and hhh coupling are discussed.
Type
journal article