Dark Matter Annihilation and the PAMELA, FERMI and ATIC Anomalies

Details Dark Matter Annihilation and the PAMELA, FERMI and ATIC Anomalies Dark Matter Annihilation and the PAMELA, FERMI and ATIC Anomalies

2009-03-29

arxiv.org/abs/0903.5083v3

Phys.Rev.D81:123507,2010

Physics

High Energy Physics

High Energy Physics - Phenomenology

13 pages, 3 figures; published for publication in Physical Review D

Scientific paper

10.1103/PhysRevD.81.123507

If dark matter (DM) annihilation accounts for the tantalizing excess of cosmic ray electron/positrons, as reported by the PAMELA, ATIC, HESS and FERMI observatories, then the implied annihilation cross section must be relatively large. This results, in the context of standard cosmological models, in very small relic DM abundances that are incompatible with astrophysical observations. We explore possible resolutions to this apparent conflict in terms of non-standard cosmological scenarios; plausibly allowing for large cross sections, while maintaining relic abundances in accord with current observations.

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