Massive particle decay and cold dark matter abundance

2004/02/29 by C. Pallis · 2 citations
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Galaxies: Formation, Evolution, Phenomena #astro-ph #hep-ph

paper · pdf · doi:10.1016/j.astropartphys.2004.05.006

published as Astropart.Phys.21:689-702,2004 · 17 pages, 4 figures, final version, including minor corrections

openalex publication_date 2004/06/17 · arxiv created 2005/03/08 · arxiv updated 2011/05/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

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 20 \rm GeV.

Citations

• Cosmic abundances of stable particles: Improved analysis
• Neutralino relic density including coannihilations
• Non-conventional cosmology from a brane universe
• Reheating stage after inflation
• Production of Massive Stable Particles in Inflaton Decay
• First Year Wilkinson Microwave Anisotropy Probe (WMAP) Observations: Preliminary Maps and Basic Results
• Relic neutralino density in scenarios with intermediate unification scale
• Yukawa unification, b→sγ and bino–stau coannihilation
• Baryogenesis at Low Reheating Temperatures

Cited by

• SUSY constraints, relic density, and very early universe
• Relic abundance of asymmetric Dark Matter