LEP summary on weak dipole moments of the $\tau$ lepton

LEP measurements of the weak electric dipole moment d/sub tau //sup w / and the weak anomalous magnetic dipole moment a/sub tau //sup w/ of the tau lepton are reviewed and the search for CP violation in the production of tau pairs on the Z peak is discussed. Two methods of the measurement of the weak dipole moments based on the analysis of the transverse and normal components of single tau polarisation (azimuthal asymmetries) and spin-spin correlations (optimal observables) are discussed. Averaging the LEP measurements, upper limits on the weak electric dipole moment of the tau lepton are obtained. (23 refs).