Determination of freeze-out conditions from fluctuation observables measured at RHIC

TL;DR

This paper determines chemical freeze-out conditions at RHIC using fluctuation observables and compares them with lattice QCD and statistical models, discussing potential influences of unaccounted fluctuation sources.

Contribution

It introduces a thermal model approach to extract freeze-out conditions from fluctuation data and compares these with theoretical predictions and other models.

Findings

Freeze-out conditions are consistent with lattice QCD results.

Additional fluctuation sources may influence the extracted parameters.

The approach provides a new way to analyze heavy-ion collision data.

Abstract

We extract chemical freeze-out conditions via a thermal model approach from fluctuation observables measured at RHIC and compare with results from lattice QCD and statistical hadronization model fits. The possible influence of additional critical and non-critical fluctuation sources not accounted for in our analysis is discussed.