Production of pions, kaons, and (anti-)protons in Au+Au collisions at $\sqrt{s_{NN}}$ = 54.4 GeV at RHIC

TL;DR

This paper presents systematic measurements of particle spectra, yields, and ratios in Au+Au collisions at 54.4 GeV at RHIC, analyzing bulk properties and freeze-out parameters to understand the created system.

Contribution

It provides new experimental data on particle production and freeze-out conditions at this collision energy, expanding the understanding of heavy-ion collision dynamics.

Findings

Particle spectra and yields are measured at mid-rapidity.

Kinetic freeze-out temperature and flow velocity are extracted.

Results are compared with previous collision energies.

Abstract

We report systematic measurements of bulk properties of the system created in Au+Au collisions at $\sqrt{s_{NN}}$ = 54.4 GeV recorded by the STAR detector at the Relativistic Heavy Ion Collider (RHIC). The transverse momentum spectra of $\pi^{\pm}$, $K^{\pm}$, and $p$($\bar{p}$) are studied at mid-rapidity $(\lvert y \rvert < 0.1)$ for different centrality classes. We also present mid-rapidity measurement of particle yields $(dN/dy)$ and particle ratios in Au+Au collisions at $\sqrt{s_{NN}}$ = 54.4 GeV. The kinetic freeze-out parameters ($T_{kin}$ and $\langle \beta \rangle$) are extracted from particle spectra using the blast-wave model, and all the results are compared with previously published experimental results.