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