Production and detection of new neutrinos

The inplications of an electromagnetic transition moment (ν/sub H/ν/sub μ/γ coupling) for production and decay of massive neutral leptons, ν/sub H/ are considered. Rates for ''disconnected γ'' and ''disconnected e+e- pair'' events from electromagnetic production and decay of ν/sub H/ are calculated. Production is considered both in the neutrino beam shielding, and production in the detector apparatus. The rates expected from three classes of plausible models are compared with the rates that can be detected by present generation experiments. The principal results are: a ν/sub H/ with a mass less than 100 MeV is best detected through an ''anomalous'' value in the measured Weinberg angle deduced from ν/sub μ/e scattering; a ν/sub H/ in the GeV range is best detected through observation of ''disconnected γ's.'' The possible detection of muon-neutrino decay ν/sub μ/ → ν/sub e/γ is discussed briefly. 32 references