Jet quenching at finite 't Hooft coupling and chemical potential from AdS/CFT

Abstract

Following the nonperturbative prescription for the jet quenching parameter recently proposed by Liu, Rajagopal and Wiedemann, we compute the first correction in the inverse 't Hooft coupling corresponding to string α′ corrections in the dual background. We also consider the introduction of a chemical potential for the U(1)3 gauged R-symmetry. While the former mildly diminishes the jet quenching parameter -this suggesting a smooth interpolation between the strong coupling and perturbative results-, the latter generically increases its value. We comment on the extension of this setup to quarks of finite mass. © SISSA 2006.