Quark Number Susceptibility and Thermodynamics in HTL approximation

TL;DR

This paper calculates quark number susceptibility and thermodynamic properties using HTL perturbation theory, linking response functions to thermodynamic sum rules and system symmetries.

Contribution

It provides leading order calculations of quark number susceptibility and thermodynamic quantities within the HTL approximation, connecting response functions to fundamental symmetries.

Findings

Leading order quark number susceptibility derived from HTL theory

Thermodynamic quantities computed at leading order

Response functions related to system symmetries

Abstract

In HTL perturbation theory we obtain leading order quark number susceptibility as a response to an external disturbance, viz., chemical potential (\mu) that generates density fluctuation, which is related to the correlation function through the thermodynamic sum rule associated with the symmetry of the system. We also obtain various thermodynamic quantities in leading order.