Scaling Properties of Azimuthal Anisotropy in Au+Au and Cu+Cu Collisions at {radical}(s{sub NN})=200 GeV

By A. Adare, S. Afanasiev, C. Aidala, N. Ajitanand, Y. Akiba, H. Al-Bataineh, J. Alexander, A. Al-Jamel, K. Aoki, L. Aphecetche and 410 more. 2006

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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.

Subfields: Nuclear and High Energy Physics

View Paper: https://www.semanticscholar.org/paper/5f7163066ddc37e3de5dc602613d92afa45f50be