Rapidity dependence of hadron production in central Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV

Abstract

The rapidity and transverse momentum spectra for identified hadrons in central Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV are computed in a quark combination model. The data of rapidity distributions for ${\pi }^{\pm }$, $K^{\pm }$, $p(\bar{p})$ and net protons $(p-\bar{p})$ are well described. We also predict rapidity distributions for $K_s^0$, $\Lambda (\bar{\Lambda })$, ${\mathrm{\Xi }}^{-}$ (${\bar{\mathrm{\Xi }}}^{{}_{+}}$) and ${\mathrm{\Omega }}^{-}+{\bar{\mathrm{\Omega }}}^{{}_{+}}$. The multiplicity ratios of charged antihadrons to hadrons as a function of rapidity are reproduced. The results for $p_T$ spectra of ${\pi }^{\pm }$, $K^{\pm }$, $p(\bar{p})$ and for the $p/\pi$ ratios in a broader $p_T$ range agree well with the data. Finally the rapidity dependence of transverse momentum distributions for hadrons are given.

Comments: 10 pages,11figures,3 tables