Magnetic moments of the low-lying $J^P=\,1/2^-$, $3/2^-$ $\Lambda$ resonances within the framework of the chiral quark model

TL;DR

This paper calculates the magnetic moments of low-lying negative parity Lambda resonances using the chiral quark model and compares results with other theoretical approaches, providing insights into their internal structure.

Contribution

It introduces a calculation of magnetic moments for specific Lambda resonances within the chiral quark model and compares these with nonrelativistic quark model and chiral theories.

Findings

Magnetic moments are computed for $ ext{Lambda}(1405)$ and $ ext{Lambda}(1520)$.

Results are compared with nonrelativistic quark model predictions.

Comparison with unitary chiral theories offers insights into resonance structures.

Abstract

The magnetic moments of the low-lying spin-parity $J^P=$ $1/2^-$, $3/2^-$ $\Lambda$ resonances, like, for example, $\Lambda(1405)$ $1/2^-$, $\Lambda(1520)$ $3/2^-$, as well as their transition magnetic moments, are calculated using the chiral quark model. The results found are compared with those obtained from the nonrelativistic quark model and those of unitary chiral theories, where some of these states are generated through the dynamics of two hadron coupled channels and their unitarization.