Particle Seminar

Date: 
Monday, January 20, 2020

Speaker: Takashi Toma

Affiliation: McGill

Time: 2:30PM -- 3:30PM

Location: HP 4351

Title: Relativistic treatment of dark thermalization

Abstract: 
If dark sector is decoupled from the Standard Model sector due to feeble

couplings, these two sectors may separately be thermalized with
different temperatures. In this case, the Maxwell-Boltzmann distribution
is traditionally assumed for dark sector for simplicity regardless of
the temperature. In this talk, the full Bose-Einstein distribution is
considered in the simplest model of real scalar dark matter. We find
that the resultant reaction rates are enhanced compared to the rates
with the Maxwell-Boltzmann distribution at high temperature. Our result
affects on calculations of relic abundance of dark matter at
relativistic regime. We also consider applications of our formalism to
the freeze-in mechanism.