Directed flow at mid-rapidity in event-by-event hydrodynamics

Details Directed flow at mid-rapidity in event-by-event hydrodynamics Directed flow at mid-rapidity in event-by-event hydrodynamics

2011-03-23

arxiv.org/abs/1103.4605v2

Phys.Rev.C83:064901,2011

Physics

Nuclear Physics

Nuclear Theory

7 pages, 6 figures; Figure data files included with source; Version accepted for publication (minor changes)

Scientific paper

10.1103/PhysRevC.83.064901

Fluctuations in the initial geometry of a nucleus-nucleus collision have been recently shown to result in a new type of directed flow (v_1) that, unlike the usual directed flow, is also present at midrapidity. We compute this new v_1 versus transverse momentum and centrality for Au-Au collisions at RHIC using the hydrodynamic code NeXSPheRIO. We find that the event plane of v_1 is correlated with the angle of the initial dipole of the distribution, as predicted, though with a large dispersion. It is uncorrelated with the reaction plane. Our results are in excellent agreement with results inferred from STAR correlation data.

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