Towards 't Hooft parameter corrections to charge transport in strongly-coupled plasma.

BABIKER HASSANAIN, MARTIN SCHVELLINGER

JOURNAL OF HIGH ENERGY PHYSICS

SPRINGER

Lugar: Trieste; Año: 2010 vol. 2010 p. 1 - 21

1126-6708

We study R-charge transport in a wide class of strongly-coupled supersymmetric plasmas at finite temperature with ´t Hooft coupling corrections. To achieve this, we use the gauge/string duality and include the full set of order(alpha´^3) corrections to the supergravity backgrounds given at zeroth order by the direct product of the AdS-Schwarzschild black hole with a five-dimensional compact Einstein manifold. On general grounds, the reduction leads to a large number of higher derivative operators, which we reduce using the symmetries of the solution. We are left with a universal set of operators whose coefficients can in principle be fixed by carrying out an explicit compactification. We apply our results to the computation of the R-charge conductivity of the supersymmetric plasma at finite yet strong coupling.