Photon, Neutrino and Charged Particle Spectra from R-violating Gravitino Decays

Abstract

We study photonic, neutrino and charged particle signatures from slow decays of gravitino dark matter in supersymmetric theories where R-parity is explicitly broken by trilinear operators. Photons and (anti-)fermions from loop and tree-level processes give rise to spectra with distinct features, which, if observed, can give crucial input on the possible mass of the gravitino and the magnitude and flavour structure of R-violating operators. Within this framework, we make detailed comparisons of the theoretical predictions to the recent experimental data from PAMELA, ATIC and Fermi LAT.

Version published in Phys. Lett. B

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• Deep Correlation Between Cosmic-Ray Anomaly and Neutrino Masses
• Axino LSP Baryogenesis and Dark Matter
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• Gravitino Dark Matter and Flavor Symmetries
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• Triplet Dark Matter from leptogenesis