Scaling Properties of Azimuthal Anisotropy in Au+Au and Cu+Cu Collisions at {radical}(s{sub NN})=200 GeV
- University of Colorado, Boulder, Colorado 80309 (United States)
- Joint Institute for Nuclear Research, 141980 Dubna (Russian Federation)
- Columbia University, New York, New York 10027 (United States) and Nevis Laboratories, Irvington, New York 10533 (US)
Differential measurements of elliptic flow (v{sub 2}) for Au+Au and Cu+Cu collisions at {radical}(s{sub NN})=200 GeV are used to test and validate predictions from perfect fluid hydrodynamics for scaling of v{sub 2} with eccentricity, system size, and transverse kinetic energy (KE{sub T}). For KE{sub T}{identical_to}m{sub T}-m up to {approx}1 GeV the scaling is compatible with hydrodynamic expansion of a thermalized fluid. For large values of KE{sub T} mesons and baryons scale separately. Quark number scaling reveals a universal scaling of v{sub 2} for both mesons and baryons over the full KE{sub T} range for Au+Au. For Au+Au and Cu+Cu the scaling is more pronounced in terms of KE{sub T}, rather than transverse momentum.
- OSTI ID:
- 20951251
- Journal Information:
- Physical Review Letters, Vol. 98, Issue 16; Other Information: DOI: 10.1103/PhysRevLett.98.162301; (c) 2007 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 0031-9007
- Country of Publication:
- United States
- Language:
- English
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