Speakers
Prof.
George W.S. Hou
George Wei-Shu Hou
(National Taiwan University (TW))
Description
We study electroweak baryogenesis driven by up-type heavy quarks in
a general two Higgs doublet model with $CP$ invariant Higgs potential.
With Higgs sector couplings and an additional top Yukawa coupling $\rho_{tt}$
all of $\mathcal{O}(1)$ in strength, one naturally has sizable $CP$ violation
that fuels a cosmic baryon asymmetry. Even if $\rho_{tt}$ vanishes, the flavor violating top-charm coupling $\rho_{tc}$ can still lead to successful
baryogenesis. Phenomenological consequences such as electron electric dipole
moment, $h \to \gamma\gamma$, and the interplay with $h\to\mu\tau$ and
$\tau\to\mu\gamma$, are discussed.
