NONLEPTONIC DECAYS OF HYPERONS AND CURRENT ALGEBRA

Nonleptonic decays of baryons are studied within the framework of current algebra, current-current interaction, and hard pions. A formalism which avoids the usual ambiguity of off-mass-shell extrapolation for the P-wave decays is developed, from which formulas for the decay amplitudes can be derived. Two models are discussed. The first model contains the equal-time commutator and the baryon pole terms, but allows for the SU(3) symmetry breaking through the presence of the parity-violating spurion matrix elements between baryons. The second model adds the 32+ decuplet and Y0*(1405) contributions to the first model, but the SU(3) symmetry-breaking matrix elements are not considered. Reasonable agreement with experiment is obtained in both models. © 1968 The American Physical Society.