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

Abstract

The production of heavy-lepton pairs by longitudinally polarized ${e}^{+}{e}^{\ensuremath{-}}$ 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 $V\ensuremath{-}A$ 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.