Campus Units

Physics and Astronomy

Document Type

Article

Publication Version

Published Version

Publication Date

4-2007

Journal or Book Title

Physical Review Letters

Volume

98

Issue

16

First Page

162301

DOI

10.1103/PhysRevLett.98.162301

Abstract

Differential measurements of elliptic flow (v(2)) for Au+Au and Cu+Cu collisions at root s(NN)=200 GeV are used to test and validate predictions from perfect fluid hydrodynamics for scaling of v(2) with eccentricity, system size, and transverse kinetic energy (KET). For KET equivalent to m(T)-m up to similar to 1 GeV the scaling is compatible with hydrodynamic expansion of a thermalized fluid. For large values of KET mesons and baryons scale separately. Quark number scaling reveals a universal scaling of v(2) for both mesons and baryons over the full KET range for Au+Au. For Au+Au and Cu+Cu the scaling is more pronounced in terms of KET, rather than transverse momentum.

Comments

This article is published as Adare, A., S. Afanasiev, C. Aidala, N. N. Ajitanand, Y. Akiba, H. Al-Bataineh, J. Alexander et al. "Scaling properties of azimuthal anisotropy in Au+ Au and Cu+ Cu collisions at s NN= 200 GeV." Physical review letters 98, no. 16 (2007): 162301. DOI: 10.1103/PhysRevLett.98.162301. Posted with permission.

Copyright Owner

American Physical Society

Language

en

File Format

application/pdf

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