Azimuthal anisotropy and correlations in the hard scattering regime at RHIC

Details Azimuthal anisotropy and correlations in the hard scattering regime at RHIC Azimuthal anisotropy and correlations in the hard scattering regime at RHIC

2002-06-10

arxiv.org/abs/nucl-ex/0206006v2

Phys.Rev.Lett.90:032301,2003

Physics

Nuclear Physics

Nuclear Experiment

As published

Scientific paper

10.1103/PhysRevLett.90.032301

Azimuthal anisotropy ($v_2$) and two-particle angular correlations of high $p_T$ charged hadrons have been measured in Au+Au collisions at $\sqrt{s_{NN}}$=130 GeV for transverse momenta up to 6 GeV/c, where hard processes are expected to contribute significantly. The two-particle angular correlations exhibit elliptic flow and a structure suggestive of fragmentation of high $p_T$ partons. The monotonic rise of $v_2(p_T)$ for $p_T<2$ GeV/c is consistent with collective hydrodynamical flow calculations. At $\pT>3$ GeV/c a saturation of $v_2$ is observed which persists up to $p_T=6$ GeV/c.

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