NORMAL AND TRANSVERSE SINGLE TAU-POLARIZATION AT THE Z-PEAK

We study normal (to the collision plane) and transverse (within the co llision plane) single-tau polarization in tau pairs produced in e+ e- unpolarized collisions at the Z-resonance. The transverse polarization component is sensitive to the anomalous weak-magnetic moment, whereas the normal polarization component is sensitive to a CP-violating weak -electric dipole moment. We show how these components of the single ta u polarization are accessible from the angular distribution of its dec ay products. We define a CP violating asymmetry of the tau decay produ cts which, with 10(7) Z's produced, provides a sensitivity of 2.3 x 10 (-18) e . cm for the weak-electric dipole moment.