Scaling of anisotropic flow in the picture of quark coalescence

Abstract

Measurements of anisotropic flow at low (p_T < 1.5 GeV/c) and intermediate (1.5 < p_T < 5 GeV/c) transverse momentum from the STAR collaboration are reviewed. While at low p_T an ordering of elliptic flow strength with particle mass is observed, the measured signals appear to follow number-of-constituent quark scaling at intermediate p_T. The observations of higher harmonics support this picture qualitatively, and are sensitive to specific model assumptions.

7 pages, 5 figures; Hot Quarks 2004 conference proceedings, to appear in J. Phys. G; revised version (small changes in wording)

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