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 $K^{ 0}_{ s}$, $\Lambda(\bar{ \Lambda})$, $\mathrm{ \Xi^{ -}}$ ($\mathrm{ \bar{ \Xi}^{ _+}}$) and $\mathrm{ \Omega^{ -}}+\mathrm{ \bar{ \Omega}}^{ _+}$. 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.
Categories: nucl-th