The force-force-correlator in hot QCD perturbatively and from the lattice

Understand

High-energy particles traversing a medium experience modified dispersion.

• In the Quark-Gluon Plasma, such dispersion affects jet propagation and transport properties and should be determined better.
• Above $\sim 2T_c$ we expect strongly coupled infrared behavior and perturbative ultraviolet behavior, allowing a perturbative matching to an effective theory called EQCD, which can be studied non-perturbatively.
• We study the relevant non-local operator in EQCD at next-to-leading order which allows for a complete EQCD-to-lattice match and prepares the groundwork for a matching between EQCD and full QCD.