Effects of 2HDM in Electroweak Phase Transition

Abstract

The entropy production scenarios due to the electroweak phase transition (EWPT) in the framework of the minimal extension of standard model, namely the two Higgs doublet model (2HDM), are revisited. The possibility of first order phase transition is discussed. Intense parameter scanning was done with the help of BSMPT, a C++ package. We perform numerical calculations in order to calculate the entropy production with numerous benchmark points.

Balancing Asymmetric Dark Matter with Baryon Asymmetry and Dilution of Frozen Dark Matter by Sphaleron Transition

“…There are many instances of entropy production, such as primordial black hole evaporation [27], electroweak phase transition within the standard model and the two Higgs doublet model [28][29][30]. Apart from these, the freeze out of dark matter density might lead to entropy production, which in turn, can dilute the pre-existing dark matter density.…”

Entopy release in Electroweak Phase Transition in 2HDM

“…where L gauge,kin , L f and L Yuk are the kinetic energy term of gauge bosons (W α and B α with α = 0, 1, 2, 3) , kinetic energy of fermions and Yukawa interaction term of fermions with Higgs bosons. These terms are defined in [6,7] and also discussed in Appendix A. Throughout this article, all the Greek indices used in super or sub-script run from 0 to 3 and Latin indices from 1 to 3 if not mentioned otherwise.…”

Charge asymmetry of new stable quarks in baryon asymmetrical Universe

“…As soon as the universe enters into the state of thermal non-equilibrium, i.e., when Γ > H, where Γ is the reaction rate and H is the Hubble parameter, the conservation law breaks down, and entropy starts pouring into the plasma; this can dilute the pre-existing baryon asymmetry and dark matter density. There are many instances of entropy production, such as primordial black hole evaporation [21], electroweak phase transition within the standard model and the two Higgs doublet model [22,23,24]. Apart from these, the freeze out of dark matter density might lead to entropy production, which in turn, can dilute the pre-existing dark matter density.…”