Weak Radiative Decays of Hyperons in the Pole Model

Abstract

It is found that the pole model which includes the decuplet pole contributions in the weak radiative decays of hyperons fails to give the correct sign of the Σ+ → pγ asymmetry parameters α, although the magnitude of the decay rate and of α are consistent with the present experimental data. This conclusion holds in the Rarita–Schwinger formalism. Earlier calculations are incorrect due mainly to an error in the spin-3/2 propagator used in the theory, and inconsistencies in the SU(3) phase convention.