Freiburg 2008 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 21: Quantenfeldtheorie I

T 21.2: Vortrag

Donnerstag, 6. März 2008, 17:05–17:20, KGI-HS 1016

Wilson loops and the static quark antiquark potential in the AdS/CFT correspondence — •Hai Ngo Thanh — Humboldt Universitaet, Berlin, Deutschland

The proposal for evaluating the expectation value of Wilson loops in the AdS/CFT correspondence will be considered. Many physical observables related to the quarks depend on how the strings, whose endpoints on some probe branes represent the quarks, are embedded in certain backgrounds. Two backgrounds are of special interest in this talk, one background dual to N=2 SYM and the Lorentz-boosted AdS black hole background dual to N=4 SYM at finite temperatures. The latter background is used as an approximation to explore some interesting properties of the Quark-Gluon-Plasma.

This talk primarily concerns the possible dependence of physical observables related to the quarks, e.g. static potential, confinement behavior, screening length and drag force, on various quark orientations inside the internal space (the five-sphere). For comparison with QCD a method to average over all relative quarks orientations is proposed.