LEPTON NONCONSERVATION AT SUPERCOLLIDER ENERGIES

The lepton-nonconserving rare process pp --> (jet)1(jet)2e+e+, without missing p(T), is the high-energy analog of neutrinoless nuclear double-beta decay. It is shown to be a possible signal to search for a heavy Majorana electronlike neutrino N(e) in the mass intervals 150-1400 GeV and 450-1700 GeV at the CERN Large Hadron Collider (LHC) and the Superconducting Super Collider, respectively, with event rates of a few per year. However, standard-model backgrounds probably preclude seeing this process at the LHC.