Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2008-01-07
Int.J.Mod.Phys.A24:1161-1174,2009
Physics
High Energy Physics
High Energy Physics - Phenomenology
8 pages, 7 figures
Scientific paper
10.1142/S0217751X0904302X
Within a quark combination model, we study systematically the yields and rapidity spectra of various hadrons in central Au+Au collisions at $\sqrt{s_{NN}}= 200$ GeV. We find that considering the difference in rapidity between net-quarks and newborn quarks, the data of multiplicities, rapidity distributions for $\pi^{\pm}$, $K^{\pm}$, $p(\bar{p})$ and, in particular the ratios of charged antihadron to hadron as a function of rapidity, can be well described. The effect of net-quarks on various hadrons is analysed, and the rapidity distributions for $K^{0}_{s}$, $\Lambda(\bar{\Lambda})$, $\Sigma^{+}(\bar{\Sigma}^{_-})$, $\mathrm{\Xi^{-}}$ ($\mathrm{\bar{\Xi}^{_+}}$) and $\mathrm{\Omega^{-}}(\mathrm{\bar{\Omega}}^{_+})$ are predicted. We discuss the rapidity distribution of net-baryon, and find that it reflects exactly the energy loss of colliding nuclei.
Shao Feng-lan
Song Jun
Wang Yun-fei
Wei De-ming
Xie Qu-bing
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