  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
$R_{AA}=0.4\pm0.15$.
