2002/05/31 by Masaaki Fujii, K. Hamaguchi, Koichi Hamaguchi · 8 citations
Physics and Astronomy · #Annihilation #Astrophysics #Baryogenesis #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark energy #Dark matter #Gravitino #Higgsino #Hot dark matter #Lightest Supersymmetric Particle #Minimal Supersymmetric Standard Model #Mixed dark matter #Particle physics #Particle physics theoretical and experimental studies #Physics #Physics beyond the Standard Model #Scalar field dark matter #Supersymmetry #Warm dark matter #Weakly interacting massive particles #astro-ph #hep-ph
paper · pdf · doi:10.1103/physrevd.66.083501
published as Phys.Rev. D66 (2002) 083501 · 51 pages, 18 figures, version accepted for publication in Physical Review D
arxiv created 2002/07/19 · openalex publication_date 2002/10/03 · arxiv updated 2009/11/30 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
The formation and late time decays of Q balls are generic consequences of the Affleck-Dine (AD) baryogenesis. A substantial number of the lightest supersymmetry (SUSY) particles (LSPs) are produced nonthermally as the decay products of these Q balls. This requires a significantly large annihilation cross section of the LSP so as not to overclose the universe, which predicts a Higgsino- or W-ino-like LSP instead of the standard B-ino LSP. We have reexamined the AD baryogenesis with special attention to the late-time decays of the Q balls, and then specified the parameter regions where the LSPs produced by the Q ball decays result in a cosmologically interesting mass density of dark matter by adopting several SUSY breaking models. This reveals new cosmologically interesting parameter regions, which have not attracted much attention so far. We have also investigated the prospects of direct and indirect detection of these dark matter candidates, and found that there is an intriguing possibility to detect them in various next generation dark matter searches.