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.
Cite
@article{arxiv.1111.7117,
title = {Indirect searches for gravitino dark matter},
author = {Michael Grefe},
journal= {arXiv preprint arXiv:1111.7117},
year = {2012}
}
Comments
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