Strong first order electroweak phase transition in 2HDM confronting future Z & Higgs factories

Understand

The electroweak phase transition can be made first order by extending the Standard Model (SM) Higgs sector with extra scalars.

• The same new physics can explain the matter-antimatter asymmetry of the universe by supplying an extra source of CP violation and sphaleron processes.
• In this paper we study the existence of a strong first order electroweak phase transition (SFOEWPT) in the type-I and type-II two Higgs doublet models (2HDM).
• We focus on how the SFOEWPT requirement constraints the spectrum of non-SM Higgs.