Showing 1998 · hep-phShow all
2 papers · 2 filters
hep-ph1998
Relic Abundance due to Cosmic Pair Annihilation
Sh. Matsumoto, M. Yoshimura
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 Bol…
hep-ph1998
Prolonged Decoupling
M. Yoshimura
We discuss decay of unstable particles and pair annihilation of stable heavy particles that occur in the cosmic medium, from the point of the fundamental microscopic theory. A full…