Gravitino Dark Matter
High Energy Physics - Phenomenology
2015-05-14 v2 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
Gravitino dark matter, together with thermal leptogenesis, implies an upper bound on the masses of superparticles. In the case of broken R-parity the constraints from primordial nucleosynthesis are naturally satisfied and decaying gravitinos lead to characteristic signatures in high energy cosmic rays. Electron and positron fluxes from gravitino decays cannot explain both, the PAMELA positron fraction and the electron + positron flux recently measured by Fermi LAT. The observed fluxes require astrophysical sources. The measured antiproton flux allows for a sizable contribution of decaying gravitinos to the gamma-ray spectrum, in particular a line at an energy below 300 GeV.
Cite
@article{arxiv.0910.1870,
title = {Gravitino Dark Matter},
author = {Wilfried Buchmuller},
journal= {arXiv preprint arXiv:0910.1870},
year = {2015}
}
Comments
10 pages, 6 figures, Talk at SUSY09, Boston