Massive particle decay and cold dark matter abundance

Feb, 2004
16 pages
Published in:
  • Astropart.Phys. 21 (2004) 689-702
e-Print:

Citations per year

200320082013201820230246810
Abstract: (arXiv)
The decoupling of a cold relic, during a decaying-particle-dominated cosmological evolution is analyzed, the relic density is calculated both numerically and semi-analytically and the results are compared with each other. Using plausible values (from the point of view of supersymmetric models) for the mass and the thermal averaged cross section times the velocity of the cold relic, we investigate scenaria of equilibrium or non-equilibrium production. In both cases, acceptable results for the dark matter abundance can be obtained, by constraining the reheat temperature of the decaying particle, its mass and the averaged number of the produced cold relic. The required reheat temperature is in any case lower than about 20GeV20 {\rm GeV}.
  • 98.80.Cq
  • 95.35.+d
  • Cosmology
  • Dark matter
  • postulated particle: heavy
  • postulated particle: decay
  • LSP: production
  • dark matter: density
  • sparticle: decoupling
  • temperature