2007/10/03 by W. A. Horowitz · 2 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Particle physics theoretical and experimental studies #Quantum Chromodynamics and Particle Interactions #nucl-th
paper · pdf · doi:10.1088/0954-3899/35/4/044025
published as J.Phys.G35:044025,2008 · 6 pages, 4 figures. Proceedings for the International Conference on Strangeness in Quark Matter (SQM 2007), Levoca, Slovakia, 24-29 June 2007
arxiv created 2007/10/03 · openalex publication_date 2008/03/18 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/07/30
We predict the charm and bottom quark nuclear modification factors using weakly coupled perturbative quantum chromodynamics (pQCD) and strongly coupled AdS/CFT drag methods. The log( p T / M Q )/ p T dependence of pQCD loss and the momentum independence of drag loss lead to different momentum dependences for the R AA predictions. This difference is enhanced by examining a new experimental observable, the double ratio of charm to bottom nuclear modification factors, R cb = R c AA / R b AA . At LHC the weakly coupled theory predicts R cb → 1, whereas the strongly coupled theory predicts R cb ∼ 0.2 independent of p T . At RHIC the differences are less dramatic, as the production spectra are harder, but the drag formula is applicable to higher momenta, due to the lower medium temperature.