Measurement of the tau lepton polarization and its forward-backward asymmetry from Z0 decays

We report on a measurement of the tau lepton polarization and its forward-backward asymmetry at the Z0 resonance using the OPAL detector. This measurement is based on analyses of the$$\tau \to e\bar v_e v_\tau $$,$$\tau \to \mu \bar v_\mu v_\tau $$, τ→π(K)vτ and τ→ρvτ from a sample of 30663 e+e+→τ+τ- events collected during the years 1990 to 1992. Assuming that the tau lepton decays according to V-A theory, we measure the average τ …