Christensen, Christian HolmChristian HolmChristensenLaine, Mikko SakariMikko SakariLaine2024-10-242024-10-242016-04-10https://boris-portal.unibe.ch/handle/20.500.12422/143877The momentum diffusion coefficient of a heavy quark in a hot QCD plasma can be extracted as a transport coefficient related to the correlator of two colour-electric fields dressing a Polyakov loop. We determine the perturbative renormalization factor for a particular lattice discretization of this correlator within Wilson’s SU(3) gauge theory, finding a ∼12% NLO correction for values of the bare coupling used in the current generation of simulations. The impact of this result on existing lattice determinations is commented upon, and a possibility for non-perturbative renormalization through the gradient flow is pointed out.en500 - Science::530 - Physicsarticle10.7892/boris.861081601.0157310.1016/j.physletb.2016.02.020