Dark Matter with Time-Varying Leptophilic Couplings
arXiv:0904.3103 · doi:10.1103/PhysRevD.80.043502
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.
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
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Cited by in corpus (7)
- Lepton-Flavored Dark Matter
- Explaining PAMELA and WMAP data through Coannihilations in Extended SUGRA with Collider Implications
- Model-independent analysis of the DAMPE excess
- Gamma-Ray Lines from Radiative Dark Matter Decay
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- Neutrinos from the Sun can discover dark matter-electron scattering