Antimatter production in central Au+Au collisions at $\sqrt{s_{\rm{NN}}}$=200 GeV

TL;DR

This study uses a coalescence model with PACIAE-generated data to successfully reproduce experimental yields and distributions of light nuclei and anti-nuclei in central Au+Au collisions at 200 GeV, providing insights into their production mechanisms.

Contribution

The paper introduces a combined modeling approach that accurately reproduces experimental data on light nuclei and anti-nuclei production in high-energy heavy-ion collisions.

Findings

PACIAE model reproduces STAR data on light nuclei yields.

Transverse momentum distributions of nuclei and anti-nuclei are similar.

Model results match experimental ratios and distributions.

Abstract

We have used the dynamically constrained phase space coalescence model to investigate the production of light nuclei (anti-nuclei) based on the 1.134$\times 10^7$ hadronic final states generated by the PACIAE model for the 0-5% most central Au+Au collisions at $\sqrt{s_{\rm{NN}}}$=200 GeV with $|y| <$1 and $p_T<$5 acceptances. The STAR data of $\bar{_{\bar\Lambda}^ 3H}$, ${_{\Lambda}^3 H}$, $^3{\bar{He}}$, and $^3{{He}}$ yields and ratios are well reproduced by the corresponding PACIAE results. The transverse momentum distribution of $\bar{^3{He}}$ (${^3{He}}$) and $\bar{_{\bar\Lambda}^3H}$ (${_{\Lambda}^3H}$) is also given. It turned out that the transverse momentum distribution of light nuclei is close to that of the corresponding anti-nuclei.