Dark matter dilution scenarios in the early universe
  When the vacuum like energy of the Higgs potential within the standard model
undergoes electroweak phase transition, an influx of entropy into the
primordial plasma can lead to a significant dilution of frozen out dark matter
density that was already present before the onset of the phase transition. The
same effect can take place, if the early Universe was dominated by primordial
black holes of small mass, evaporating before the period of Big Bang
Nucleosynthesis. In this paper we calculate the dilution factor for the above
mentioned scenarios.
