The Source of Trimuon Events in Neutrino Scattering*

A comprehensive study indicates that equally likely sources for trimuon events in neutrino scattering are a) charged heavy lepton production (with decay to three muons) and b) simultaneous production of a neutral lepton (with decay to two muons) and a heavy quark (with decay to one muon). The sequential decay of a heavy quark to two muons is less likely. An intriguing model yielding simultaneous MO and b quark production is proposed. (Submitted to Phys. Rev. Letters. ) *Work supported in part by the Energy Research and Development Administration. “fOn leave of absence from the University of Pennsylvania.