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arXiv · 2602.19821

Thermodynamically consistent treatment of repulsive corrections in HRG

Somenath Pal
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Abstract

We reformulate the treatment of density-dependent chemical potential shifts appearing in excluded-volume implementations of the hadron resonance gas model. An auxiliary classical representation is constructed in which a common energy shift is determined by preserving the scalar number density, ensuring thermodynamic consistency. Hadron radii are parametrized through a liquid-drop inspired mass-radius relation with two parameters: the pion radius and a scaling exponent. The resulting framework reproduces lattice QCD results for lower-order conserved-charge susceptibilities at zero chemical potentials with only two adjustable parameters.

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Somenath Pal. 2026-02-23. Thermodynamically consistent treatment of repulsive corrections in HRG. https://arxiv.org/abs/2602.19821

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