WEAK DIPOLE-MOMENT OF TAU IN E- COLLISIONS WITH LONGITUDINALLY POLARIZED ELECTRONS(E)

It is pointed out that certain CP-old momentum correlations in the pro duction and subsequent decay of tau pairs in e+e- collisions get enhan ced when the e- is longitudinally polarized. Analytic expressions for these correlations arc obtained for the single-pion decay mode of tau when tau+tau- have a ''weak'' dipole form factor (WDFF) coupling to Z. For e+e- collisions at the Z peak, a sensitivity of about (1-5) x 10( -17) e cm for the tau WDFF can be reached using a single tau+tau- deca y channel, with 10(6) Z's likely to be available at the Stanford Linea r Collider with e- polarization of 62%-75%.