Two freeze-out model for the hadrons produced in the Relativistic Heavy-Ion Collisions

TL;DR

This paper introduces a two freeze-out model for hadron production in heavy-ion collisions, successfully fitting experimental data and providing insights into the sequential freeze-out process at different temperatures.

Contribution

It develops a novel two freeze-out model with distinct chemical and thermal freeze-outs, fitting multiple experimental observables simultaneously.

Findings

Good fit to hadron ratios and spectra

Freeze-out parameters align with published values

Supports sequential freeze-out hypothesis

Abstract

An expanding fireball model with two freeze-outs, which assumes that the chemical freeze-out occurs earlier at higher temperature and the thermal freeze-out occurs later at lower temperature, is developed and successfully applied to fit simultaneously the hadron ratios, transverse momentum spectra of measured hadrons and rapidity distribution of charged hadrons measured in Au+Au collision at 200 A$\cdot$GeV by STAR, PHENIX and PHOBOS collaborations. The quality of all the fittings is very good and the resulting parameters are in agreement with published values.