Test of new physics models with first-order phase transition
by
A238
School of Science
Although the Higgs boson predicted by the Standard Model (SM) was discovered in 2012, the shape of the Higgs potential remains unknown. New physics effects beyond the SM can modify the Higgs potential and consequently affect the electroweak phase transition in the early Universe. In particular, a first-order phase transition can occur in various new physics models. Such a phase transition can generate gravitational waves and primordial black holes. These signals from the early Universe provide complementary probes of new physics beyond the SM. Therefore, models featuring a first-order phase transition can be tested through a combination of particle collider experiments and cosmological observations.
In this talk, we consider several new physics scenarios that can induce a first-order phase transition and discuss their testability through gravitational waves, primordial black holes, and collider experiments.