Lepton-Cascade-Decay Interpretation of Neutrino-Produced Trimuons

We explain neutrino-produced trimuon events with a gauge model incorporating heavy leptons $M^{-}$ and $M^0$ with the cascade-decay chain $M^{-}\to M^0{\mu }^{-}\overline{\nu }$ and $M^0\to {\mu }^{-}{\mu }^{+}\nu$. Comparisons with trimuon data are made for $M^{-}$ and $M^0$ masses 7 and 3.5 GeV, respectively. This mechanism predicts same-sign dimuons at five times the trimuon rate.