NONLEPTONIC AND WEAK-ELECTROMAGNETIC DECAYS OF HYPERONS IN POLE MODEL

An estimate is made for the contribution of the decuplet poles to the weak decays of hyperons using the Rarita-Schwinger formalism for spin-32 fields. SU(3) symmetry is used in conjunction with the Gourdin-Salin model for the D-B-π and D-B-γ couplings. It is shown that the decuplet contribution is large for the parity-violating amplitudes. For weak-electromagnetic decays, this predicts asymmetry parameters which are at variance with earlier calculations. The decay rate for +→pγ agrees well with the experimental result. © 1969 The American Physical Society.