Lambda beta-decay in-medium

TL;DR

This paper investigates how the in-medium modifications of a bound Lambda hyperon affect its beta-decay properties, predicting significant changes in the axial charge due to hadron interactions.

Contribution

It applies the quark-meson coupling model to estimate the in-medium modifications of Lambda beta-decay, highlighting potential observable effects.

Findings

Significant predicted change in axial charge within the model

Supports the feasibility of measuring in-medium effects experimentally

Provides theoretical basis for future experimental investigations

Abstract

Under the working hypothesis that the structure of a bound hadron is modified by its interactions with other hadrons, one may expect to see changes in carefully chosen observables. In the light of a recent proposal to measure the axial charge in the strangeness changing beta-decay of a bound Lambda hyperon, we examine the size of the change expected within the quark-meson coupling model. It is predicted to be significant.