Speaker
Description
The possible entropy production scenarios in the early
universe are revisited. From the particle physics viewpoint we consider
electroweak phase transition (EWPT) in the standard model (SM) and
beyond standard model (BSM) scenarios like 2 Higgs doublet model (2HDM)
as a source of entropy influx into the primordial plasma. First order
phase transition in the case of 2HDM is realised. From a cosmological
viewpoint the evaporation of mini primordial black holes (PBH) in their
matter dominated (MD) stage in the early Universe is considered for the
same. The production of entropy and in turn the dilution of preexisting
baryon asymmetry and the dark matter density are considered in details
as well as possible production of entropy as a result of first order
phase transition is discussed qualitatively.
