Relative Hadron Yields in HRG With Medium Modification

TL;DR

This paper investigates how medium modifications to baryon masses and short-range repulsive interactions affect hadron yield ratios and freeze-out conditions in ultra-relativistic nucleus-nucleus collisions within a modified HRG model.

Contribution

It introduces a constituent quark mass model with medium-modified baryon masses and incorporates hard-core repulsion into the HRG framework, providing new insights into freeze-out parameters.

Findings

Modified baryon masses influence particle ratios.

The freeze-out line differs from previous models.

Correlation between $k^{-}/k^{+}$ and $ar p/p$ ratios is analyzed.

Abstract

In the framework of a constituent quark mass model, the modified baryon masses are incorporated into the hadron resonance gas (HRG) based analysis of the like mass particle ratios in ultra relativistic nucleus-nucleus collisions (URNNC) over a wide range of collision energy. In addition we have incorporated an essential feature of the hadronic interaction at short distance, i.e. the hard-core repulsion by using the standard excluded volume type approach. We have extracted the chemical freeze-out conditions. The resulting freeze-out line in our case is compared with those obtained earlier using different model approaches. The correlation between $k^{-}/k^{+}$ and $\bar p/p$ ratios is also studied.