Effects of isospin mixing in the A=32 quintet

TL;DR

This paper presents a unified theoretical analysis of isospin mixing effects in the A=32 T=2 quintet, explaining experimental observations related to mass multiplet deviations, forbidden proton decay, and beta decay corrections.

Contribution

It provides the first comprehensive theoretical explanation linking various isospin mixing phenomena in the A=32 quintet to a common origin.

Findings

All three effects are traced to isospin mixing with T=1 states.

The study explains deviations in the isobaric mass multiplet equation.

It accounts for isospin-forbidden proton decay and beta decay corrections.

Abstract

For the A=32 T=2 quintet we provide a unified theoretical description for three related aspects of isospin mixing: the necessity of more than three terms in the isobaric mass multiplet equation, isospin-forbidden proton decay, and a correction to the allowed Fermi beta decay. We demonstrate for the first time that all three effects observed in experiment can be traced to a common origin related to isospin mixing of the T=2 states with T=1 states.