Study of Particle Production in Au+Au Collisions at $\sqrt{s_{NN}} =$ 11.5-200 GeV Using HYDJET++ Framework

TL;DR

This study uses the HYDJET++ model to analyze multi-strange particle production in Au+Au collisions across a range of energies, comparing results with experimental data to understand freeze-out conditions and strangeness enhancement.

Contribution

It introduces an analysis of multi-strange particle production using HYDJET++, highlighting model performance at different energies and providing insights into strangeness enhancement and QCD matter properties.

Findings

HYDJET++ agrees better with data at higher energies for multi-strange particles

Default model version performs better for lighter, non-strange particles

Results offer constraints on parton energy loss and QCD matter transport properties

Abstract

Using the HYDJET++ model, we study the production of multi-strange particles($\phi$ and $\Omega$) in Au+Au collisions at $\sqrt{s_{NN}} =$ 11.5, 19.6, 27, 39, and 200 GeV as functions of transverse momentum and centrality. The model calculations employ earlier freeze-out hypersurfaces for multi-strange particle production and are compared with STAR experimental data. Results indicate that the HYDJET++ model demonstrates a better agreement with experimental data for multi-strange particles at higher energies, particularly in relation to early thermal freeze-out. Meanwhile, the default version performs more accurately for lighter, non-strange particles at the same energy scales. We also analyze identified particle and mixed particle ratios, providing insights into strangeness enhancement. The results provide additional constraints on parton energy loss models, contributing to a more precise determination of the transport properties of hot and dense QCD matter.