Indirect searches for gravitino dark matter

Details Indirect searches for gravitino dark matter Indirect searches for gravitino dark matter

2011-11-30

arxiv.org/abs/1111.7117v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

4 pages, 15 figures; to appear in the proceedings of the 12th International Conference on Topics in Astroparticle and Undergro

Scientific paper

The gravitino in models with a small violation of R-parity is a well-motivated decaying dark matter candidate that leads to a cosmological scenario that is consistent with big bang nucleosynthesis and thermal leptogenesis. The gravitino lifetime is cosmologically long-lived since its decays are suppressed by the Planck-scale as well as the small R-parity violating parameter. We discuss the signals in different cosmic-ray species coming from the decay of gravitino dark matter, namely gamma rays, positrons, antiprotons, antideuterons and neutrinos. Comparison to cosmic-ray data can be used to constrain the parameters of the model.

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