On Drag Forces and Jet Quenching in Strongly Coupled Plasmas

Details On Drag Forces and Jet Quenching in Strongly Coupled Plasmas On Drag Forces and Jet Quenching in Strongly Coupled Plasmas

2006-06-15

arxiv.org/abs/hep-th/0606134v2

JHEP0612:068,2006

Physics

High Energy Physics

High Energy Physics - Theory

12 pages, 1 figure; added references, minor changes

Scientific paper

10.1088/1126-6708/2006/12/068

We compute the drag force experienced by a heavy quark that moves through plasma in a gauge theory whose dual description involves arbitrary metric and dilaton fields. As a concrete application, we consider the cascading gauge theory at temperatures high above the deconfining scale, where we obtain a drag force with a non-trivial velocity dependence. We compare our results with the jet-quenching parameter for the same theory, and find qualitative agreement between the two approaches. Conversely, we calculate the jet-quenching parameter for N=4 super-Yang-Mills with an R-charge density (or equivalently, a chemical potential), and compare our result with the corresponding drag force.

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