Searching for SUSY and decaying gravitino DM at the LHC and Fermi-LAT with the $\mu\nu$SSM

Understand

The `$\mu$ from $\nu$' supersymmetric standard model ($\mu\nu$SSM) solves the $\mu$ problem of supersymmetric models and reproduces neutrino data, simply using couplings with the three families of right-handed neutrinos $\nu$'s.

• Novel signatures of supersymmetry at the LHC are expected through these new states, and couplings breaking $R$ parity.
• All supersymmetric particles are potential candidates for the lightest one, which is not stable leading to prompt or displaced vertices and producing final states with multi-leptons/taus/jets/photons and missing energy.
• Besides, a decaying gravitino turns out to be an interesting candidate for dark matter.