Kinetic decoupling of WIMPs: analytic expressions
  We present a general expression for the values of the average kinetic energy
and of the temperature of kinetic decoupling of a WIMP, valid for any
cosmological model. We show an example of the usage of our solution when the
Hubble rate has a power-law dependence on temperature, and we show results for
the specific cases of kination cosmology and low- temperature reheating
cosmology.
