The thermal evolution of nuclear matter at zero temperature and definite baryon number density in chiral perturbation theory

TL;DR

This paper investigates the thermal properties of cold dense nuclear matter using chiral perturbation theory, revealing how key properties evolve with baryon chemical potential and indicating a tendency toward chiral restoration at high densities.

Contribution

It provides new calculations of the evolution of baryon density, susceptibility, pressure, and chiral condensate at zero temperature in dense nuclear matter using chiral perturbation theory.

Findings

Baryon density and pressure increase with chemical potential.

Chiral condensate decreases rapidly beyond 1150 MeV, indicating chiral restoration.

The equation of state is characterized at various densities.

Abstract

The thermal properties of cold dense nuclear matter are investigated with chiral perturbation theory. The evolution curves for the baryon number density, baryon number susceptibility, pressure and the equation of state are obtained. The chiral condensate is calculated and our result shows that when the baryon chemical potential goes beyond $1150 \mathrm{MeV}$, the absolute value of the quark condensate decreases rapidly, which indicates a tendency of chiral restoration.