The scalar potential at finite temperature is often used to track the thermal evolution of the universe and in the study of cosmological phase transitions (PTs). As observables, such as the spectrum of gravitational waves (GWs), can ultimately be derived from this quantity, it must be computed accurately. We first review the calculation of the finite-temperature effective potential,...
We discuss various phenomenological aspects of physics in the model for EW baryogenesis based on the extended Higgs sectors. Important discriminative predictions of the scenario of EW baryogenesis are the phenomena from extra CP violation and the first order EW phase transition. We discuss some phenomenological features of models of EW baryogenesis and how to test such models by future...
We discuss the catalysis of the primordial black holes(PBH) on the first-order electroweak phase transition(FOEWPT). We accurately studied the nucleation rate for bubbles around the PBH by solving the Einstein and bounce equations rather than applying the thin-wall approximation. We found the ordinary thin-wall approximation will overestimate the nucleation rate. For the first time, we showed...
Collider-based searches for new physics are inherently limited in both energy reach and experimental precision. In contrast, first-order phase transitions (FOPTs) in the early universe can probe much higher fundamental scales, making it valuable to place observational constraints on a broad class of models. We propose a combined statistical analysis across multiple frequency bands that can set...
We study nonthermal production of heavy dark matter from the dynamics of the background scalar field during a first-order phase transition, predominantly from bubble collisions. In scenarios where bubble walls achieve runaway behavior and get boosted to very high energies, we find that it is possible to produce dark matter with mass several orders of magnitude above the symmetry breaking scale...
I will discuss the production of gravitational waves from a first-order phase transition in a "Dark Higgs Inflation" model (providing a unified framework for inflation and observable gravitational waves from a phase transition) and in an SO(10) Grand Unified Theory.
