Large Observed $v_2$ as a Signature for Deconfinement

Details Large Observed $v_2$ as a Signature for Deconfinement Large Observed $v_2$ as a Signature for Deconfinement

2005-11-21

arxiv.org/abs/nucl-th/0511052v2

Acta Phys.Hung. A27 (2006) 221-225

Physics

Nuclear Physics

Nuclear Theory

4 pages, 1 figure, QM2005 Poster Proceedings. Refereed version updated with minor changes to the text

Scientific paper

10.1556/APH.27.2006.2-3.10

We present a new plot for representing RAA data that emphasizes the strong correlation between high-pt suppression and its elliptic anisotropy. We demonstrate that existing models cannot reproduce the centrality dependence of this correlation. Modification of a geometric energy loss model to include thermal absorption and stimulated emission can match the trend of the data, but requires dN/dy values inconsistent with the observed multiplicity. By including a small, outward-normal directed surface impulse opposing energy loss, $\Delta pt \hat{n}$, one can account for the centrality dependence of the observed Au+Au elliptic quench pattern. We also present predictions for Cu+Cu reactions.

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