Right-handed sneutrino as cold dark matter of the Universe
Right-handed sneutrino as cold dark matter of the Universe
We consider the minimal supersymmetric standard model (MSSM) extended by introducing three right-handed (s)neutrinos to account for neutrino masses in the oscillation experiments. Assuming that the neutrino masses are purely Dirac type, the lightest right-handed sneutrino ${\stackrel{\texttildelow{}}{\ensuremath{\nu}}}_{R}$ can be the lightest superparticle (LSP), which is a good candidate of cold …