Dark Matter with Time-Varying Leptophilic Couplings

Details Dark Matter with Time-Varying Leptophilic Couplings Dark Matter with Time-Varying Leptophilic Couplings

2009-04-21

arxiv.org/abs/0904.3103v2

Phys.Rev.D80:043502,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, Revtex 4. Estimates of possible gamma ray signals, a note regarding the recent Fermi-LAT results, and several new ref

Scientific paper

10.1103/PhysRevD.80.043502

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.

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