Theoretical issues in calculating the relic abundance of dark matter particles
by
Motohiko YOSHIMURA (Tohoku University)
→
Europe/Zurich
TH Auditorium (CERN)
TH Auditorium
CERN
Description
The Boltzmann equation approach to estimate the relic abundance of dark matter particles is critically re-examined, and a new approach based on a fully quantum mechanical treatment of WIMP and thermal environment interaction is developed. The outcoming result shows that when the heavy WIMP decays in a very non-relativistic speed, the abundance is given by a power of temperature in contrast to the usual Boltzmann suppressed exponential. This has a great impact on the SUSY dark matter parameters.