Gravitational wave and collider signals in complex two-Higgs doublet model with dynamical CP-violation at finite temperature

Understand

Extra CP-violating source for electroweak baryogenesis can dynamically appear at finite temperature in the complex two-Higgs doublet model, which might help to alleviate the strong constraints from the electric dipole moment experiments.

• In this scenario, we study the detailed phase transition dynamics and the corresponding gravitational wave signals in synergy with the collider signals at future lepton colliders.
• For some parameter spaces, various phase transition patterns can occur, such as the multi-step phase transition and supercooling.
• Gravitational waves complementary to collider signals can help to pin down the underlying phase transition dynamics or different phase transition patterns.