Chiral Symmetry Restoration, Thermal Resonances and the $U(1)_A$ symmetry

TL;DR

This paper explores how chiral and $U(1)_A$ symmetry restoration occur at finite temperature, analyzing Ward Identities and meson resonances to understand their interplay and implications for QCD phase transitions.

Contribution

It provides a detailed analysis of the relationship between chiral and $U(1)_A$ symmetry restoration using Ward Identities and resonance behavior at finite temperature, offering new insights into QCD symmetries.

Findings

Chiral and $U(1)_A$ symmetries show interconnected restoration patterns.

Light meson resonances exhibit specific thermal modifications near the transition.

Ward Identities effectively relate susceptibilities and condensates at finite temperature.

Abstract

We discuss recent results regarding the interplay between chiral and $U(1)_A$ symmetry restoration, both from the point of view of Ward Identities relating meson susceptibilities and quark condensates, and from the behaviour of light meson resonances at finite temperature