Scaling properties of azimuthal anisotropy of mesons and baryons at RHIC

Details Scaling properties of azimuthal anisotropy of mesons and baryons at RHIC Scaling properties of azimuthal anisotropy of mesons and baryons at RHIC

2005-06-16

arxiv.org/abs/nucl-ex/0506019v1

Acta Phys.Hung. A25 (2006) 371-379

Physics

Nuclear Physics

Nuclear Experiment

21St Winter workshop on Nuclear Dynamics

Scientific paper

10.1556/APH.25.2006.2-4.27

Detailed measurements of the azimuthal anisotropy (\v2) for identified charged particles are reported as a function of transverse momentum ($p_T$) and centrality for Au+Au collisions at \sqrtsNN = 200 GeV. The measurements indicate clear evidence for eccentricity and particle flavor scaling over a broad range of centralities and transverse rapidity $y_T$, indicating a hydrodynamical origin of the fine structure of azimuthal anisotropy at RHIC. The observed scaling supports the picture of a suddenly hadronizing (recombining) fluid of quarks. An apparent breaking of flavor scaling at relatively large values of $y_T$ points to an important change in the mechanism for particle emission.

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