Symmetry Breaking Effects in Nonleptonic Decays of Hyperons

Abstract

491We have examined the symmetry breaking effects in nonleptonic decays of hyperons. It turned out that if the weak spurion is confined to a unitary octet, then representations other than octet of SB@SW bring new parameters on the decay modes of A and S particles. Among the three properti~sl) ofnonleptonic hyperon decays, therefore, the formulation of Property III) is modified by the broken symmetry SB'Next we have investigated the pole model along the same line of thought as Paper I [Prog. Theor. Phys. 39 (1968), 1289J. In particular, for the p-wave channel, we have assumed that the form of weak vertex is the divergence of vector current. Our pole model has such remarkable merits as it reproduces fine results of the usual pole model but is free from the singularity of l/£im appearing in the usual one. Downloaded from o a Va (i)_type vertex.The Cabibbo theory16) with CVC**) is well established in leptonic decays of *') The CP invariance excludes oa V a (6)-type. **) CVC means the hypothesis 17 ) of conserved vector current.