Signals of dark matter in a supersymmetric two dark matter model

Understand

Supersymmetric radiative neutrino mass models have often two dark matter candidates.

• One is the usual lightest neutralino with odd R parity and the other is a new neutral particle whose stability is guaranteed by a discrete symmetry that forbids tree-level neutrino Yukawa couplings.
• If their relic abundance is comparable, dark matter phenomenology can be largely different from the minimal supersymmetric standard model (MSSM).
• We study this in a supersymmetric radiative neutrino mass model with the conserved R parity and a $Z_2$ symmetry weakly broken by the anomaly effect.