Ultra-cold weakly interacting massive particles: relics of non-standard pre-big-bang-nucleosynthesis cosmologies

2008/03/31 by Graciela B. Gelmini, Paolo Gondolo · 1 citation
Physics and Astronomy · #Astronomy #Astrophysics #Big Bang nucleosynthesis #Cold dark matter #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Decoupling (probability) #Galaxies: Formation, Evolution, Phenomena #Horizon #Massive particle #Nucleosynthesis #Particle physics #Physics #Scalar field dark matter #Stars #Universe #WIMP #Weakly interacting massive particles #astro-ph

paper · pdf · doi:10.1088/1475-7516/2008/10/002

published as JCAP 0810:002,2008 · Six pages, one figure- Extensive additions and rewriting with respect to v1. Figure changed

arxiv created 2008/08/20 · openalex publication_date 2008/10/02 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

Weakly interacting massive particles (WIMPs) constitute one of very few probes of cosmology before big bang nucleosynthesis (BBN). We point out that in scenarios in which the Universe evolves in a non-standard manner during and after WIMP kinetic decoupling, the horizon mass scale at decoupling can be smaller and the dark matter WIMPs can be colder than in standard cosmology. This would lead to much smaller first objects in hierarchical structure formation. In low reheating temperature scenarios the effect may be large enough to noticeably enhance indirect detection signals in GLAST and other detectors, by up to two orders of magnitude.

Citations

• Massive particle decay and cold dark matter abundance
• Cosmological implications of dynamical supersymmetry breaking
• Destruction of small-scale dark matter clumps in the hierarchical structures and galaxies
• Constraints on minimal SUSY models with warm dark matter neutralinos
• A note on Polonyi problem
• Production of Massive Stable Particles in Inflaton Decay
• Nonthermal dark matter via Affleck-Dine baryogenesis and its detection possibility
• Relic neutralino density in scenarios with intermediate unification scale
• Effects of cold dark matter decoupling and pair annihilation on cosmological perturbations
• Small-scale clumps in the galactic halo and dark matter annihilation
• Kinetic decoupling of neutralino dark matter
• Effect of a late decaying scalar on the neutralino relic density
• Precise constraints on the dark matter content of Milky Way dwarf galaxies for gamma-ray experiments

Cited by

• (Non-)Thermal Production of WIMPs during Kination