Dark Matter with Time-Varying Leptophilic Couplings
High Energy Physics - Phenomenology
2009-08-18 v2 High Energy Astrophysical Phenomena
High Energy Physics - Theory
Abstract
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 (red-shift) dependent annihilation signal, in terms of strength and dominant final states.
Cite
@article{arxiv.0904.3103,
title = {Dark Matter with Time-Varying Leptophilic Couplings},
author = {Hooman Davoudiasl},
journal= {arXiv preprint arXiv:0904.3103},
year = {2009}
}
Comments
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