Speaker
Description
Baryon number can be efficiently violated at low temperatures, from Higgs bubble collisions in a strongly first-order electroweak phase transition, based on the dynamics of electroweak textures [2508.21825]. This may open up new possibilities of realizing electroweak baryogenesis in models with a low reheat temperature and large bubble wall velocity.
In this talk, I will propose a novel mechanism of cold electroweak baryogenesis from Higgs bubble collisions, which extends our first work [2508.21825] by including a dynamical CP-violating source, namely $\frac{1}{\Lambda^2}\phi^\dagger \phi \text{Tr}[W \tilde{W}]$, in (3+1)D real-time lattice simulations of the Higgs and SU(2)-gauge bosons, where true vacuum critical bubbles are nucleated at initial time. In particular, I will discuss the lattice techniques implemented to treat the fields’ evolution, as well as the CP-violating term.
This work can be extended to compute the resulting primordial magnetic field, by embedding the $U(1)_Y$-gauge boson in the simulations.