Supergravity and the jet quenching parameter in the presence of R-charge densities

Abstract

Following a recent proposal, we employ the AdS/CFT correspondence to compute the jet quenching parameter for ≤ 4 Yang-Mills theory at nonzero R-charge densities. Using as dual supergravity backgrounds non-extremal rotating branes, we find that the presence of the R-charges generically enhances the jet quenching phenomenon. However, at fixed temperature, this enhancement might or might not be a monotonically increasing function of the R-charge density and depends on the number of independent angular momenta describing the solution. We perform our analysis for the canonical as well as for the grand canonical ensemble which give qualitatively similar results. © SISSA 2007.