A Study of the Lorentz Structure in τ Decays in DELPHI.

A measurement of the Michel parameters, η, ρ, ξ, ξδ, and the average ν[sub τ] helicity, h[sub ν[sub τ]], in τ lepton decays is described together with the first measurement of the tensor coupling in the weak charged current. The results are consistent with the V - A structure of the weak charged current in decays of the τ lepton. [ABSTRACT FROM AUTHOR]