Conditions driving chemical freeze-out

TL;DR

This paper suggests that entropy density is the key thermodynamic condition for chemical freeze-out in heavy-ion collisions, effectively reproducing experimental data and characteristic endpoints using lattice calculations.

Contribution

It introduces entropy density as the primary condition for chemical freeze-out, validated against experimental data and lattice calculations.

Findings

Entropy density accurately reproduces freeze-out parameters.

The model captures the characteristic endpoints in the freeze-out diagram.

Lattice calculations at zero chemical potential support the approach.

Abstract

We propose the entropy density as the thermodynamic condition driving best the chemical freeze-out in heavy-ion collisions. Taking its value from lattice calculations at zero chemical potential, we find that it is excellent in reproducing the experimentally estimated freeze-out parameters. The two characteristic endpoints in the freeze-out diagram are reproduced as well.