The nucleon properties in finite temperature and density with vector meson

TL;DR

This paper investigates how vector meson interactions influence nucleon properties at finite temperature and density, revealing effects on nucleon size, mass, and stability with implications for heavy ion collisions and compact star physics.

Contribution

It introduces vector meson $$ into the Quark Meson model and analyzes their impact on static hadron properties using mean-field approximation.

Findings

Vector interactions cause nucleon radius expansion.

Hadrons' mass increases with vector interactions.

Hadrons become less stable due to decreased mass gap.

Abstract

We introduce the vector meson $\omega$ into the Quark Meson model, and study the impact of vector interactions on the properties of static hadrons using the mean-field approximation. The short-range repulsive force associated with vector interactions leads to an expansion of the root mean square radius of nucleons. While the mass of hadrons increases, the gap between this mass and the energy of the three free constituent quarks decreases, resulting in the instability of hadrons. Our study of nucleon mass and radius at finite temperature and density has potential applications for particle yield in heavy ion collisions and the mass-radius relationship in compact stars.