Relic Abundance due to Cosmic Pair Annihilation
| dc.creator | Matsumoto, Sh. | |
| dc.creator | Yoshimura, M. | |
| dc.date | 1998-09-30 | |
| dc.date.accessioned | 2026-07-07T04:05:14Z | |
| dc.date.available | 2026-07-07T04:05:14Z | |
| dc.description | 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. | |
| dc.description | 9 pages, LATEX file with 2 PS figures | |
| dc.identifier | https://arxiv.org/abs/hep-ph/9809585 | |
| dc.identifier | http://arxiv.org/abs/hep-ph/9809585 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/48340 | |
| dc.subject | High Energy Physics - Phenomenology | |
| dc.title | Relic Abundance due to Cosmic Pair Annihilation | |
| dc.type | text |