Gravitino dark matter and R-violating SUSY searches

Abstract

We study gravitino dark matter and slow gravitino decays in supersymmetric theories with broken R-parity. For the model parameters that may give rise to viable radiative neutrino masses and visible R-violating signatures in colliders, gravitinos are cosmologically stable and can be good dark matter candidates. For the range of parameters of interest, observable lepton flavour violation is to be expected, both at low energy rare processes but also at the LHC. The rates strongly depend on the flavour structure of R-violating operators, and have distinct correlations that should be distinguishable in the coming generation of experiments.