Interacting hadron resonance gas meets lattice QCD

TL;DR

This paper models hadron interactions via finite-size corrections in the hadron resonance gas framework and compares the results with lattice QCD predictions to understand thermodynamic properties.

Contribution

It introduces a finite-size correction approach to the interacting hadron resonance gas model and assesses its sensitivity to hadron radius parameters.

Findings

Thermodynamical quantities align with lattice QCD results for certain hadron radii.

Model sensitivity to hadron size impacts energy and entropy density predictions.

Finite-size corrections improve the hadron resonance gas model's accuracy.

Abstract

We present, in the framework of the interacting hadron resonance gas, an evaluation of thermodynamical quantities. The interaction is modelled via a correction for the finite size of the hadrons. We investigate the sensitivity of the model calculations on the radius of the hadrons, which is a parameter of the model. Our calculations for thermodynamical quantities as energy and entropy densities and pressure are confronted with predictions using the lattice Quantum Chromodynamics (QCD) formalism.