Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1998-09-30
Physics
High Energy Physics
High Energy Physics - Phenomenology
9 pages, LATEX file with 2 PS figures
Scientific paper
Pair annihilation of heavy stable particles that occurs in the early universe is reconsidered including the off-shell effect not properly taken into account by the conventional Boltzmann equation approach. Our new calculation of the time evolution shows that the off-shell effect prolongs the freeze-out, always with a larger final relic abundance. The final yield (number density/temperature^3) is insensitive to the effective coupling for the annihilation and of order (10^{- 8}\times (M/1 GeV)^{1/3}), with $M$ the heavy particle mass, if the coupling is not too small.
Matsumoto Sh.
Yoshimura Masaki
No associations
LandOfFree
Relic Abundance due to Cosmic Pair Annihilation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Relic Abundance due to Cosmic Pair Annihilation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Relic Abundance due to Cosmic Pair Annihilation will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-692757