System Size and Energy Dependence of Elliptic Flow

Details System Size and Energy Dependence of Elliptic Flow System Size and Energy Dependence of Elliptic Flow

2006-02-06

arxiv.org/abs/nucl-ex/0602008v1

AIP Conf.Proc.842:134-136,2006

Physics

Nuclear Physics

Nuclear Experiment

3 pages, 3 figures, talk given at Particles and Nuclei International Conference (PANIC05), Santa Fe, New Mexico, 24-28 Oct 200

Scientific paper

10.1063/1.2220212

The elliptic flow v2 is presented for the Cu+Cu collisions at sqrt{s_NN} = 62.4 and 200 GeV, as a function of pseudorapidity. Comparison to results for the Au+Au collisions at the same energies shows a reduction of about 20% in the flow observed for a centrality selection of 0-40%. The centrality dependent flow, expressed as a function of the number of participants N_part, is compared for the Cu+Cu and Au+Au systems using two definitions of eccentricity, the standard definition epsilon_standard and a participant eccentricity epsilon_part. The v2 / as a function of N_part, for the Au+Au and Cu+Cu collisions are consistent within errors, while v2 / gives unrealistically large values for Cu+Cu, especially for central collision.

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