Chemical freeze-out of light nuclei in high energy nuclear collisions and resolution of the hyper-triton chemical freeze-out puzzle

TL;DR

This paper introduces a novel hadron resonance gas model to accurately describe light nuclei production in high-energy nuclear collisions, resolving the hyper-triton chemical freeze-out puzzle by matching experimental ratios without fitting.

Contribution

The study extends the hadron resonance gas model to include mixtures of hadrons and light nuclei, providing a new approach that explains experimental data and resolves existing puzzles.

Findings

Accurate description of hadronic and light nuclei data at STAR and ALICE energies.

Reproduction of experimental ratios $S_3$ and $ar{S}_3$ without fitting.

Resolution of the hyper-triton chemical freeze-out puzzle.

Abstract

We present a summary of the recent results obtained with the novel hadron resonance gas model with the multicomponent hard-core repulsion which is extended to describe the mixtures of hadrons and light (anti-, hyper-)nuclei. A very accurate description is obtained for the hadronic and the light nuclei data measured by STAR at the collision energy $\sqrt{s_{NN}} =200$ GeV and by ALICE at $\sqrt{s_{NN}} =2.76$ TeV. The most striking result discussed here is that for the most probable chemical freeze-out scenario for the STAR energy the found parameters allow us to reproduce the values of the experimental ratios $S_3$ and $\overline{S}_3$ without fitting.