On the temperature dependence of the electrical conductivity in hot quenched lattice QCD

Extending our recent work (Ding et al., 2011 [8]), we report on a calculation of the vector current correlation function for light valence quarks in the deconfined phase of quenched QCD in the temperature range 1.16Tc≲T≲2.98Tc. After performing a systematic analysis of the influence of cut-off effects on light quark meson correlators using clover improved Wilson fermions, we discuss resulting constraints on the electrical conductivity in a quark gluon plasma.