Analysis of the freeze-out parameters for RHIC, SPS and AGS based on ${ {dE_{T}} \over {d\eta}} / {{dN_{ch}} \over {d\eta}}$ ratio measurements

TL;DR

This paper analyzes the freeze-out parameters in heavy-ion collisions at RHIC, SPS, and AGS using a thermal hadron gas model, showing good agreement with experimental ratio measurements.

Contribution

It introduces a comprehensive analysis of the ${{dE_{T}} ackslash {d a}} / {{dN_{ch}} ackslash {d a}}$ ratio within a single-freeze-out thermal model, incorporating resonance decays.

Findings

Model predictions match experimental data at RHIC, SPS, and AGS.

Resonance decays significantly influence the ratio.

Freeze-out parameters are consistent across different collision energies.

Abstract

The ratio ${{dE_{T}} \over {d\eta}} / {{dN_{ch}} \over {d\eta}}$ is analyzed in the framework of a single-freeze-out thermal hadron gas model. Decays of hadron resonances are taken into account in evaluations of this ratio. The predictions of the model at the freeze-out parameters, established previously from observed particle yields, agree very well with the ratio measured at RHIC, SPS and AGS.