The Search for Heavy Particles

Direct and indirect evidence for the existence of a new heavy quark b and of new heavy neutral leptons eke and =/tip can be sought in neutrino and e+escattering. These particles are expected to have right-handed currents. Discussion is given on the characteristics, production and decay of hadrons such as b6, & and &, and of the massive neutral leptons. -Muon number violation with and without ?Ne and -“;c is considered. ’ (Invited talk given at Orbis Scientiae, University of Miami, Coral Gables, Florida, January1 7’-21, 1977. ) *Work supported by the Energy Research and Development Administration.