Hydrodynamic event-plane correlations in Pb+Pb collisions at sqrt(s)=2.76ATeV

Abstract

The recently measured correlations between the flow angles associated with higher harmonics in the anisotropic flow generated in relativistic heavy-ion collisions are shown to be of hydrodynamic origin. The correlation strength is found to be sensitive to both the initial conditions and the shear viscosity of the expanding fireball medium.

5 pages, 4 figures. Two footnotes added, slight editions of text in response to referee comments. This version accepted by Physics Letters B. The figures in v2 are based on 11-fold statistics compared to v1, for both MC-Glauber and MC-KLN initial conditions; the figures in the journal version have such high statistics only for the MC-Glauber model

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