Speaker
Hooman Davoudiasl
(BNL)
Description
We propose that the dynamics of a scalar $\phi$ of mass $O(10)$ MeV, weakly coupled to the Higgs, can give rise to a first order electroweak phase transition. Vacuum stability close to the weak scale requires a suppressed (maybe vanishing) top Yukawa coupling before the transition, rising to the Standard Model (SM) value later. All SM flavor could appear similarly, after the electroweak phase transition, through dimension-5 interactions of $\phi$ suppressed by scales from $O(10^3)$ TeV to near Planck mass. The scalar $\phi$ is long-lived and can yield missing energy signals in rare kaon decays.
Author
Hooman Davoudiasl
(BNL)
