Self-consistent model for nonleptonic decays of Σ and Λ hyperons

Abstract

A self-consistent calculation of pionic Σ and Λ decays has been carried out in the pole approximation of an S matrix approach in order to get information on (a) the angular momentum in which the decay Σ⁺→nΠ⁺ takes place, (b) the relative (ΣΛ) parity, (c) the possible existence of other than global symmetric solutions. On the basis of existing experimental data, the model predicts that Σ⁺→nΠ⁺ decay must occur in the s wave, and, somewhat less definitely, that (ΣΛ) parity is even.