Axial charges of the nucleon and N* resonances

TL;DR

This paper calculates the axial charges of the nucleon and N* resonances using a relativistic quark model, providing predictions that align with experimental and lattice QCD results, and discusses their significance for low-energy QCD.

Contribution

First calculation of N* axial charges within a relativistic constituent quark model, extending understanding of baryon structure and QCD low-energy behavior.

Findings

Nucleon axial charge predicted close to experimental value.

Axial charges of N*(1535) and N*(1650) agree with lattice QCD results.

Highlights the importance of N* axial charges for low-energy QCD.

Abstract

The axial charges of the nucleon and the well-established N* resonances are studied within a consistent framework. For the first time the axial charges of the N* resonances are produced for the relativistic constituent quark model. The axial charge of the nucleon is predicted close to experiment, and the ones of N*(1535) and N*(1650), the only cases where such a comparison is possible, agree well with results from quantum chromodynamics on the lattice that have recently become available. The relevance of the magnitudes of the N* axial charges for the low-energy behavior of quantum chromodynamics is discussed.