Indirect searches for gravitino dark matter

Abstract

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.

4 pages, 15 figures; to appear in the proceedings of the 12th International Conference on Topics in Astroparticle and Underground Physics (TAUP 2011), Munich, Germany, 5-9 September 2011

References in corpus (3)

• Observation of an anomalous positron abundance in the cosmic radiation
• Broken R-Parity in the Sky and at the LHC
• Unstable Gravitino Dark Matter - Prospects for Indirect and Direct Detection

Cited by in corpus (6)

• Review of the theoretical and experimental status of dark matter identification with cosmic-ray antideuterons
• SUSY dark matter(s)
• Antiproton Limits on Decaying Gravitino Dark Matter
• Antideuterons from Decaying Gravitino Dark Matter
• Dark Matter Signatures of Supermassive Black Hole Binaries
• Analysis of branon dark matter and extra-dimensional models with AMS-02