Parity violation in heavy-lepton production by longitudinally polarizede+e−beams

The production of heavy-lepton pairs by longitudinally polarized $e^{+}{e}^{-}$ colliding beams induces a parity-violating correlation in the angular distribution of the daughter leptons. The dependence of the parity asymmetry on the beam and lepton energy is studied in $V-A$ and $V+A$ current models for the heavy lepton. Large asymmetries are expected from the threshold of heavy-lepton production to very high energies. The energy-integrated angular distribution of the detected leptons becomes parity-symmetric at very high energies.