Entropy production due to electroweak phase transition in the framework of two Higgs doublet model

Abstract

We revisit the possibility of first order electroweak phase transition (EWPT) in one of the simplest extensions of the Standard Model (SM) scalar sector, namely the two-Higgs-doublet model (2HDM). We take into account the ensuing constraints from the electroweak precision tests, Higgs signal strengths, and the recent LHC bounds from direct scalar searches. By studying the vacuum transition in 2HDM, we discuss in detail the entropy released in the first order EWPT in various parameter planes of 2HDM.

Study of entropy production due to electroweak phase transition in $Z_2$ symmetric extension of the Standard Model

“…Within the framework of the SM with single Higgs the phase transition is crossover in nature. But in extended theories of the SM, it can be of first-order, [17], [18], [19], [20] and [21].…”

Dark matter dilution scenarios in the early universe

“…One of them, for example, if the universe was at some epoch dominated by primordial black holes with small masses, the entropy production can be very high. 9 In the presence of multi higgs field or a multi charged extension of the SM can lead to more rigorous results, [10][11][12][13][14] Primordial black holes(PBH) might have dominated the cosmological energy density in the early universe and might have effected the baryon asymmetry of the universe, the fraction of dark matter particles, and would lead to the rise of the density perturbations at relatively small scales. Usually PBHs are created through Zel'dovich-Novikov (ZN) mechanism.…”