2009/04/30 by Hooman Davoudiasl · 1 citation
Physics and Astronomy · #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Particle physics theoretical and experimental studies #astro-ph.HE #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.80.043502
published as Phys.Rev.D80:043502,2009 · 5 pages, Revtex 4. Estimates of possible gamma ray signals, a note regarding the recent Fermi-LAT results, and several new references added in this version
arxiv created 2009/07/16 · openalex publication_date 2009/08/06 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
Two general problems arise when interpreting the recent cosmic ray data as signals of dark matter (DM) annihilation: (i) the required cross section is too large by O(100), and (ii) the annihilation products seem to be mostly leptonic. We propose to address these two problems by assuming that the couplings of DM to leptons grow with time. This can be achieved by a dynamic localization of DM in extra dimensions. A possible outcome of this proposal is a time (redshift) dependent annihilation signal, in terms of strength and dominant final states.