Pion, kaon, and (anti-)proton production in U+U Collisions at $\sqrt{s_{NN}}$ = 193 GeV measured with the STAR detector

TL;DR

This paper reports the first measurements of pion, kaon, and (anti-)proton transverse momentum spectra in U+U collisions at 193 GeV, analyzing particle yields, ratios, and freeze-out parameters, and comparing with Au+Au data and the AMPT model.

Contribution

It provides new experimental data on identified particle production in U+U collisions at RHIC, extending previous measurements from Au+Au collisions and testing the AMPT model.

Findings

Particle yields and ratios vary with collision centrality.

Average transverse momenta are consistent with previous Au+Au results.

Model comparisons show reasonable agreement with experimental data.

Abstract

We present the first measurements of transverse momentum spectra of $\pi^{\pm}$, $K^{\pm}$, $p(\bar{p})$ at midrapidity ($|y| < 0.1$) in U+U collisions at $\sqrt{s_{NN}}$ = 193 GeV with the STAR detector at the Relativistic Heavy Ion Collider (RHIC). The centrality dependence of particle yields, average transverse momenta, particle ratios and kinetic freeze-out parameters are discussed. The results are compared with the published results from Au+Au collisions at $\sqrt{s_{NN}} =$ 200 GeV in STAR. The results are also compared to those from A Multi Phase Transport (AMPT) model.