Non-Leptonic decays of hyperons in the quartet model

Abstract

The non-leptonic hyperon decays are investigated in the framework of the colored quartet model with GIM current. We take two octet components of the weak Hamiltonian which belong to 15 and 20″ representations of SU(4) symmetry. The 15 Hamiltonian arising from the symmetry breaking is assumed to have the universal spurion coupling. We obtain remarkable fits to s- and p-wave amplitudes both in the current algebra approach and the dispersion theory. It is shown that the standard arguments for s-wave decays based on the K ∗ pole dominance, on the duality arguments and on the current algebra lead to different physical consequences with one another.