Scalar response of the nucleon chiral symmetry and nuclear matter properties

TL;DR

This paper explores how chiral symmetry and confinement influence the scalar response of the nucleon and the properties of nuclear matter, using a chiral approach and the NJL model.

Contribution

It introduces a chiral invariant scalar field linked to nucleon mass generation and incorporates confinement effects to improve nuclear matter modeling.

Findings

Chiral invariant scalar field affects nucleon mass and nuclear binding.

Confinement stabilizes nuclear matter in the model.

Spontaneous chiral symmetry breaking influences nuclear matter properties.

Abstract

In this talk we present a description of nuclear binding in a chiral approach based on the existence of a chiral invariant scalar field associated with the generation of the masses through spontaneous chiral symmetry breaking. We discuss the emergence of such a field on the example of the NJL model. We also incorporate the effect of confinement at the level of the nucleon substructure to stabilize nuclear matter. In a particular quark-diquark model we illustrate the simutaneous influences of spontaneous chiral symmetry breaking and confinement on the nucleon mass and on the nuclear matter description.