Effect of a late decaying scalar on the neutralino relic density

2006/05/01 by Graciela B. Gelmini, Graciela Gelmini, Paolo Gondolo +2 · 2 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #hep-ph

paper · pdf · doi:10.1103/physrevd.74.083514

published as Phys.Rev. D74 (2006) 083514 · 16 pages, 14 figures

arxiv created 2006/05/01 · openalex publication_date 2006/10/18 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

If the energy density of the Universe before nucleosynthesis is dominated by a scalar field \ensuremathφ that decays and reheats the plasma to a temperature T_RH smaller than the standard neutralino freeze-out temperature, the neutralino relic density differs from its standard value. In this case, the relic density depends on two additional parameters: T_RH, and the number of neutralinos produced per \ensuremathφ decay per unit mass of the \ensuremathφ field. In this paper, we numerically study the neutralino relic density as a function of these reheating parameters within minimal supersymmetric standard models and show that the dark matter constraint can almost always be satisfied.

Citations

• Cosmic abundances of stable particles: Improved analysis
• Moduli-Induced Gravitino Problem
• Relic neutralino density in scenarios with intermediate unification scale

Cited by

• Hunting the lightest lightest neutralinos
• SUSY constraints, relic density, and very early universe