Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2007-02-22
Physics
Nuclear Physics
Nuclear Experiment
6 pages, 4 figures, proceeding to QM2006
Scientific paper
The PHENIX experiment at RHIC measured $\omega$, $\eta$ and $K_{S}^{0}$-meson production at high $p_{T}$ in $p+p$, $d+Au$ and $Au+Au$ collisions at $\sqrt{s_{NN}}=200$ $GeV$. Measurements performed in different hadronic decay channels give consistent results. The measured ratios of all three mesons to $\pi^{0}$ are found to be flat as a function of $p_{T}$ in $p+p$ collisions and equal to $\omega/\pi^{0}=0.81\pm0.02\pm0.07$, $\eta/\pi^{0}=0.48\pm0.02\pm0.02$ and $K_{S}^{0}/\pi^{0}=0.45\pm0.01\pm0.05$. Nuclear modification factor measured for $\omega$-mesons in central Au+Au collisions is $R_{AA}=0.4\pm0.15$.
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