phi-meson production in heavy-ion collisions at RHIC

S-L Blyth, the STAR Collaboration
2006 Journal of Physics G: Nuclear and Particle Physics  
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
more » ... 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.
doi:10.1088/0954-3899/32/12/s56 fatcat:b3a7o4a6yrfohp4drindsgmtxu