568 citations · 5.2k across the 127 of their papers we have counts for
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hep-ph1998★ 11 cited
Quantum Kinetic Equation and Cosmic Pair Annihilation
Sh. Matsumoto, M. Yoshimura
Pair annihilation of heavy stable particle that occurs in the early universe is investigated, and quantum kinetic equation for the momentum distribution of the annihilating particl…
hep-ph1998★ 22 cited
Prolonged Decay and CP-asymmetry
I. Joichi, Sh. Matsumoto, M. Yoshimura
Time evolution of unstable particles that occur in the expanding universe is investigated. The off-shell effect not included in the Boltzmann-like equation is important for the dec…