Flow and non-flow event anisotropies at the SPS

Abstract

A study of differential elliptic event anisotropies (v_2) of charged particles and high-pt pions in 158 AGeV/c Pb+Au collisions is presented. Results from correlations with respect to the event plane and from two-particle azimuthal correlations are compared. The latter give systematically higher v_2 values at pt>1.2GeV/c providing possibly an evidence of a non-flow semihard component.

4 pages, 6 figures, Quark Matter 2002, Nantes, to appear in Nucl. Phys. A

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• Azimuthal Anisotropy of Photon and Charged Particle Emission in Pb+Pb Collisions at 158 A GeV/c
• Effect of Finite Granularity of Detectors on Anisotropy Coefficients