Azimuthal Anisotropy and Correlations in the Hard Scattering Regime at RHIC

C. Adler et al. (STAR Collaboration)
Phys. Rev. Lett. 90, 032301 – Published 24 January 2003

Abstract

Azimuthal anisotropy (v2) and two-particle angular correlations of high pT charged hadrons have been measured in Au+Au collisions at sNN=130GeV for transverse momenta up to 6GeV/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 pT partons. The monotonic rise of v2(pT) for pT<2   GeV/c is consistent with collective hydrodynamical flow calculations. At pT>3   GeV/c, a saturation of v2 is observed which persists up to pT=6   GeV/c.

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  • Received 10 June 2002

DOI:https://doi.org/10.1103/PhysRevLett.90.032301

©2003 American Physical Society

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Vol. 90, Iss. 3 — 24 January 2003

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