Weakly interacting massive particle densities in decaying-particle-dominated cosmology
- 15 February 1991
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review D
- Vol. 43 (4) , 1063-1068
- https://doi.org/10.1103/physrevd.43.1063
Abstract
We consider the present cosmological density of weakly interacting massive particles (WIMP's) in the context of models where the energy density is dominated by decaying massive particles, such that WIMP's freeze out of chemical equilibrium during the massive-particle-dominated era. An expression for the density of WIMP's is derived by a generalization of the Lee-Weinberg argument for the density of heavy neutrinos in the standard cosmological model.Keywords
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