Statistical hadronization phenomenology in $K/\pi$ fluctuations at ultra-relativistic energies

TL;DR

This paper analyzes fluctuations in heavy ion collisions using the statistical model to extract information about the system's properties and freeze-out dynamics at ultra-relativistic energies.

Contribution

It provides new constraints on the statistical properties and freeze-out dynamics based on recent experimental fluctuation data within the statistical hadronization framework.

Findings

Constraints on the relevant statistical ensemble

Insights into chemical equilibration levels

Information on reinteraction between freeze-outs

Abstract

We discuss the information that can be obtained from an analysis of fluctuations in heavy ion collisions within the context of the statistical model of particle production. We then examine the recently published experimental data on ratio fluctuations, and use it to obtain constraints on the statistical properties (physically relevant ensemble, degree of chemical equilibration, scaling across energies and system sizes) and freeze-out dynamics (amount of reinteraction between chemical and thermal freeze-out) of the system.