Lightlike Wilson loops from AdS/CFT

Details Lightlike Wilson loops from AdS/CFT Lightlike Wilson loops from AdS/CFT

2008-01-30

arxiv.org/abs/0801.4594v1

JHEP0803:071,2008

Physics

High Energy Physics

High Energy Physics - Theory

32 pages, 6 figures

Scientific paper

10.1088/1126-6708/2008/03/071

We investigate the lightlike limit of stationary spacelike string configurations on a large class of five-dimensional asymptotically AdS backgrounds. Specific examples include gravity duals which incorporate finite 't Hooft coupling, curvature-squared corrections, and chemical potentials. A universal feature of these AdS/CFT models is that the string solution with minimum action yields a lightlike Wilson loop whose leading behavior is exponentially linear, rather than quadratic, in the width of the loop. Unless there is a compelling reason for discarding the leading saddlepoint contribution to the Wilson loop, following the proposal of Liu et. al. [2] leads to zero jet-quenching parameter for all of these models.

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