Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2006-08-08
J.Phys. G32 (2006) S461-S464
Physics
Nuclear Physics
Nuclear Experiment
Submitted to J. Phys. G (Proceedings of the 9th International Conference on Strangeness in Quark Matter, Los Angeles, USA, Mar
Scientific paper
10.1088/0954-3899/32/12/S56
We present the first elliptic flow, $v_{2}$, measurement for the $\phi$-meson in Au+Au collisions at $\sqrt{s_{NN}}$=200 GeV. At low $p_{T}$ (<2 GeV/c), the $v_{2}$ is consistent with mass ordering expected from hydrodynamics, while at higher $p_{T}$ (>4 GeV/c), it follows the same trend as the $K^{0}_{S}$ $v_{2}$ and a parameterization for number of quarks = 2. The nuclear modification factor, $R_{CP}$, has also been measured and it follows the same trend as the $K^{0}_{S}$ rather than the $\Lambda$ which confirms the baryon/meson-type dependence of $R_{CP}$ at RHIC. A model based on the recombination of thermal s-quarks describes the central $\phi$-meson $p_{T}$ spectrum as well as the baryon/meson ratio of $\Omega/\phi$ up to $p_{T}$ ~4 GeV/c.
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