Determination of Spin and Decay Parameters of Fermion States

The decay process Y/sup */ yields Y + pi , where Y/sup */ has spin J and decays into a particle with spin 1/2 (Y) and one with spin zero ( pi ), is considered. It is shown how J and the amplitudes for the parity states 1 = J + 1/ 2 may be measured if the transverse and longitudinal polarizations of Y are appreciable. (auth)