Screening length in plasma winds

Details Screening length in plasma winds Screening length in plasma winds

2006-07-28

arxiv.org/abs/hep-th/0607233v4

JHEP0610:011,2006

Physics

High Energy Physics

High Energy Physics - Theory

21 pages, 1 figure, JHEP3; v3&v4: minor improvements & corrections

Scientific paper

10.1088/1126-6708/2006/10/011

We study the screening length L_s of a heavy quark-antiquark pair in strongly coupled gauge theory plasmas flowing at velocity v. Using the AdS/CFT correspondence we investigate, analytically, the screening length in the ultra-relativistic limit. We develop a procedure that allows us to find the scaling exponent for a large class of backgrounds. We find that for conformal theories the screening length is (boosted energy density)^{-1/d}. As examples of conformal backgrounds we study R-charged black holes and Schwarzschild-anti-deSitter black holes in (d+1)-dimensions. For non-conformal theories, we find that the exponent deviates from -1/d and as examples we study the non-extremal Klebanov-Tseytlin and Dp-brane geometries. We find an interesting relation between the deviation of the scaling exponent from the conformal value and the speed of sound.

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