MEASUREMENT OF THE MICHEL PARAMETERS AND THE CHIRALITY PARAMETER IN TAU-DECAYS FROM E(-)-]TAU(+)TAU(-)()E()

The Michel parameters rho, eta, xi and xi delta, the chirality paramet er xi(h), and the tau polarization P-tau, are measured using 32012 Z - -> tau(+)tau(-) decays recorded by the L3 dectector at LEP. Their valu es are extracted from the energy spectra of leptons and hadrons in tau (-) --> l(-)<(nu)over bar>(l) nu(tau) and tau(-) --> pi(-)nu(tau) deca ys, the energy and decay angular distributions in tau(-) --> rho(-)nu( tau) decays, and the correlations in the energy spectra and angular di stributions of the decay products. Assuming universality in leptonic a nd semileptonic tau decays, the results are rho = 0.794 +/- 0.039 +/- 0.031, eta = 0.25 +/- 0.17 +/- 0.11, xi = 0.94 +/- 0.21 +/- 0.07, xi d elta = 0.81 +/- 0.14 +/- 0.06, xi(h) = -0.970 +/- 0.053 +/- 0.011, and P-tau = -0.154 +/- 0.018 +/- 0.012.