The Energy of a Moving Quark-Antiquark Pair in an N=4 SYM Plasma

Details The Energy of a Moving Quark-Antiquark Pair in an N=4 SYM Plasma The Energy of a Moving Quark-Antiquark Pair in an N=4 SYM Plasma

2006-07-13

arxiv.org/abs/hep-th/0607089v2

JHEP 0609 (2006) 068

Physics

High Energy Physics

High Energy Physics - Theory

LaTeX 2e, 27 pages, 8 eps figures; v2: added computation of the pair energy in the plasma rest frame, clarified the comparison

Scientific paper

10.1088/1126-6708/2006/09/068

We make use of the AdS/CFT correspondence to determine the energy of an external quark-antiquark pair that moves through strongly-coupled thermal N=4 super-Yang-Mills plasma, both in the rest frame of the plasma and in the rest frame of the pair. It is found that the pair feels no drag force, has an energy that reproduces the expected 1/L (or gamma/L) behavior at small quark-antiquark separations, and becomes unbound beyond a certain screening length whose velocity-dependence we determine. We discuss the relation between the high-velocity limit of our results and the lightlike Wilson loop proposed recently as a definition of the jet-quenching parameter.

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