Qualitative and quantitative energy loss?

2010/11/30 by W. A. Horowitz
Physics and Astronomy · #High-Energy Particle Collisions Research #hep-ph #nucl-th

paper · pdf · doi:10.1016/j.nuclphysa.2011.02.045

published as Nucl.Phys.A855:225-228,2011 · 5 pages, 6 figures. Proceedings for Hard Probes 2010. Minor changes from v1

arxiv created 2010/12/13 · openalex publication_date 2011/04/01 · arxiv updated 2011/08/19 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

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 pi⁰ 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 pi⁰ and non-photonic electron RAA as well as high-pT ratios of antiprotons to pi^- production than those based on pQCD.

Citations

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