A Nambu--Jona-Lasinio model of quantum chromodynamics and hadron structure

TL;DR

This review explores the covariant Nambu-Jona-Lasinio model as an effective approach to understanding hadron structure and QCD properties, comparing predictions with experimental data.

Contribution

It demonstrates how the NJL model can imitate chiral symmetry breaking and confinement, providing insights into hadron structure observables relevant for future experiments.

Findings

NJL model reproduces key features of QCD in hadron structure

Parton distribution functions and form factors align with experimental data

Implications for upcoming EIC, EicC, and COMPASS experiments are discussed

Abstract

In this review paper, I present a study of the structure of the hadrons computed in the covariant Nambu-Jona-Lasinio model as the chiral effective quark theory of QCD. I describe how the NJL model is treated to imitate the spontaneous chiral symmetry breaking and confinement QCD properties. The consistency for the parton distribution functions and electromagnetic form factors, as internal structure observables, in comparison with existing data and other theoretical predictions, is also shown. The implications of mimicking the QCD properties in the NJL model for hadron structure observables, as well as the relevance of the results to EIC, EicC, and COMPASS/AMBER future experiments, are discussed.