Parity Nonconservation and Decay of Hyperon

Under the assumption that the parity conservation does not hold for the decay processes of strange particles, we examine loth the angular distribution of the final decay product for the cascade decay of E hyperon and the asymmetrical distribution of decay product about the production plane of hyperons which are produced by K- -p interaction. So far as our kinematical study for these processes is concerned, it is impossible to know whether the decay interaction is invariant under the time reversal. However, there exists a possibility of solving this problem by making use of the values of phase shifts for 11:- N scattering. Namely, if the two decay interactions, E-->A+rr and A~N+rr, are invariant under the time reversal, we may expect that the fore-aft asymmetry (with respect to the direction of motion of A) of the final decay product for the cascade decay will be ol:served, while if they are simultaneously invariant under the charge conju­ gation, we cannot probably confirm the existence of asymmetrical angular distribution.