Description
The evolution of a particle in the Quark-Gluon Plasma is determined by transport coefficients. Especially the diffusion of a heavy adjoint quark or quarkonium can be measured from the correlator of two chromoelectric field operators connected by a static Wilson line in the adjoint representation. The first mass correction is then given by using chromomagnetic fields instead. However, the static Wilson line introduces a divergent term in lattice spacing and appears as a renormalon in the continuum. We use gradient flow to renormalize the field components and to regulate this divergence. We present measurements on the relevant correlators on the lattice for the adjoint diffusion and different approaches to extract the divergence.
