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

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 $\sqrt{s_{\mathrm{NN}}}$=200 GeV with $|y|<$1 and $p_T<$5 acceptances. The STAR data of $\overline{{}_{\stackrel{ˉ}{\Lambda }}^{3}H}$, ${}_{\Lambda }^{3}H$, ${}^3\overline{He}$, and ${}^{3}He$ yields and ratios are well reproduced by the corresponding PACIAE results. The transverse momentum distribution of $\overline{{}^{3}He}$ (${}^{3}He$) and $\overline{{}_{\stackrel{ˉ}{\Lambda }}^{3}H}$ (${}_{\Lambda }^{3}H$) is also given. It turned out that the transverse momentum distribution of light nuclei is close to that of the corresponding anti-nuclei.

Comments: 5 pages, 2 figures