Abstract
Collective flow reflects the dynamical evolution in high-energy heavy ion collisions. In particular, the elliptic flow reflects early collision dynamics [STAR Collaboration, J. Adams et al., Nucl. Phys. A 757, (2005) 102]. We present a systematic analysis of elliptic flow ( ν 2 ) for identified particles measured in Au + Au and Cu + Cu collisions at s NN = 200 GeV . Number of quark scaling is tested in the intermediate p T region and in the smaller system (Cu + Cu ). The Cu + Cu collisions results are compared with those from ideal hydrodynamic model calculations.
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