Physics – Nuclear Physics – Nuclear Experiment
Scientific paper
2011-01-15
Nucl.Phys.A862-863:263c-266c,2011
Physics
Nuclear Physics
Nuclear Experiment
4 pages, 3 figures. The proceedings of the sixth International Conference on Physics and Astrophysics of Quark Gluon Plasma
Scientific paper
10.1016/j.nuclphysa.2011.05.054
The measurement of the elliptic flow, $v_{2}$, provides a powerful tool for studying the properties of hot and dense medium created in high-energy nuclear collisions. We present the measurement of $v_{2}$ of multi-strange hadrons ($\phi$, $\Xi$ and $\Omega$) in $\sqrt{s_{NN}}$= 200 GeV Au + Au collisions at STAR. In minimum-bias Au + Au collisions at $\sqrt{s_{NN}}$ = 200 GeV, a significant amount of elliptic flow, almost identical to other mesons and baryons, is observed for multi-strange hadrons. Experimental observations of $p_{T}$ dependence of $v_{2}$ of identified particles at RHIC support partonic collectivity. We also discuss the possible breaking of mass ordering of the $\phi$ mesons in the low $p_{T}$ region.
for the STAR Collaboration
Shi Shusu
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