Some aspects of the quark-antiquark Wilson loop formalism in the NRQCD   framework
  Starting from the NRQCD Lagrangian the heavy quark-antiquark potential is written in terms of field strength insertions on a static Wilson loop. The relevant matching coefficients are given at the present status of knowledge. The short-range, perturbatively dominated, behaviour of the spin-dependent terms is discussed. 
Nora Brambilla (Univ. Vienna) and Antonio Vairo (HEPHY Vienna)