Antimatter production in central Au+Au collisions at $\sqrt{s_{\rm{NN}}}$=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 $\sqrt{s_{\rm{NN}}}$=200 GeV with $|y| <$1 and $p_T<$5 acceptances. The STAR data of $\bar{_{\barΛ}^ 3H}$, ${_Λ^3 H}$, $^3{\bar{He}}$, 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 $\bar{_{\barΛ}^3H}$ (${_Λ^3H}$) is also given. It turned out that the transverse momentum distribution of light nuclei is close to that of the corresponding anti-nuclei.

5 pages, 2 figures