Light quark energy loss in strongly coupled N=4 supersymmetric Yang-Mills plasma

We compute the penetration depth of a light quark moving through a large N_c, strongly coupled N=4 supersymmetric Yang-Mills plasma using gauge/gravity duality and a combination of analytic and numerical techniques. We find that the maximum distance a quark with energy E can travel through a plasma is given by Δx_max⁡(E)=(C/T)(E/Tλ)^1/3 with C≈0.5.