Screening length in plasma winds
Jul, 200621 pages
Published in:
- JHEP 10 (2006) 011
e-Print:
- hep-th/0607233 [hep-th]
Report number:
- UTTG-11-06,
- KEK-TH-1095
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Abstract:
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.Note:
- 21 pages, 1 figure, JHEP3/ v3&v4: minor improvements & corrections
- AdS/CFT correspondence
- thermal field theory
- space-time: anti-de Sitter
- field theory: conformal
- string model
- membrane model: D-brane
- membrane model: p-brane
- gauge field theory
- approximation: strong coupling
- quark antiquark
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