Qualitative and Quantitative Energy Loss?

Details Qualitative and Quantitative Energy Loss? Qualitative and Quantitative Energy Loss?

2010-11-27

arxiv.org/abs/1011.5965v2

Nucl.Phys.A855:225-228,2011

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, 6 figures. Proceedings for Hard Probes 2010. Minor changes from v1

Scientific paper

10.1016/j.nuclphysa.2011.02.045

Despite the 300% systematic theoretical uncertainty associated with extracting qhat using current energy loss models due to the collinear approximation, and despite the uncertainties in the initial geometry and corrections due to the fluctuations in the initial overlap of a heavy ion collision, a simultaneous description of high-pT pi^0 RAA and v2 is not possible with current pQCD-based energy loss models. However a good description of out-of-plane RAA as a function of centrality is possible. Alternatively, energy loss models based on AdS/CFT give a better qualitative description of pi^0 and non-photonic electron RAA as well as high-pT ratios of antiprotons to pi^- production than those based on pQCD.

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