Resonances in weak nonleptonic Omega^- decay

TL;DR

This paper investigates how spin-1/2 resonances influence weak nonleptonic Omega^- decays using chiral perturbation theory, finding significant effects and good experimental agreement.

Contribution

It introduces spin-1/2 resonances into an effective theory for Omega^- decays, extending previous models and confirming their importance.

Findings

Resonances significantly affect decay amplitudes

Results agree well with experimental data

Extends previous hyperon decay models

Abstract

We examine the importance of J^P = 1/2^+, 1/2^- resonances for weak nonleptonic Omega^- decays within the framework of chiral perturbation theory. The spin-1/2 resonances are included into an effective theory and tree contributions to the Omega^- decays are calculated. We find significant contributions to the decay amplitudes and satisfactory agreement with experiment. This confirms and extends previous results wherein such spin-1/2 resonances were included in nonleptonic and radiative-nonleptonic hyperon decays.