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

A bstract The electroweak phase transition can be made first order by extending the Standard Model (SM) Higgs sector with extra scalars. same new physics explain matter-antimatter asymmetry of universe supplying an source CP violation and sphaleron processes. In this paper we study existence strong (SFOEWPT) in type-I type-II two doublet models (2HDM). We focus on how SFOEWPT requirements constraint spectrum non-SM Higgs. Through parameter space scan, find that suggests upper limit masses heavy $$ {m}_{A/H/{H}^{\pm }} m A / H ± , which is around 1 TeV. High temperature expansion vacuum uplifting used for analytical understanding our results. After taking into account probe ability from theoretical constraints, Z -pole precision measurements up to one-loop level at future & factories, sizeable loop corrections require {m}_{A/{H}^{\pm }}-{m}_H − ∈ (100 250) GeV meet condition Type-II 2HDM, \left|{m}_{A/{H}^{\pm }}-{m}_H\right| 350) or \left|{m}_A-{m}_{H/{H}^{\pm }}\right| Type-I 2HDM.