We have used the leptonic decays of the tau to determine the Lorentz structure of its decay vertex. We find the Michel parameter to be 0.710.090.03, which is consistent with V-A (=0.75) and inconsistent with V+A. This measurement represents the first such analysis using muons in the final state.
|Number of pages||3|
|Journal||Physical Review D - Particles, Fields, Gravitation and Cosmology|
|State||Published - 1985|