title: Gamma-ray spectrum from gravitino dark matter decay.
abstract: Gravitinos are very promising candidates for the cold dark matter of the Universe. Interestingly, to achieve a sufficiently long gravitino lifetime, R parity conservation is not required, thus preventing any dangerous cosmological influence of the next-to-lightest supersymmetric particle. When R parity is violated, gravitinos decay into photons and other particles with a lifetime much longer than the age of the Universe, producing a diffuse gamma-ray flux with a characteristic spectrum that could be measured in future experiments, such as GLAST or AMS-02. In this Letter we compute the energy spectrum of photons from gravitino decay and discuss its main qualitative features.
authors: Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany.
authors: Alejandro
authors: A
authors: Ibarra
authors: David
authors: D
authors: Tran