Centrality dependence of the $N(\Omega)/N(\phi)$ ratios and $\phi$ $v_{2}$ - a test of thermalization in Au+Au collisions at RHIC

Abstract

We present the centrality dependence of the $N(\Omega)/N(\phi)$ ratios and $\phi$ $v_{2}$ measured in Au+Au collisions at $\sqrt{s_{NN}}=200$ GeV by the STAR experiment at RHIC. The results are compared to measurements of other identified particles and recombination model expectations in order to gain insight into the partonic collectivity and possible thermalization of the produced medium.