Two-loop evaluation of large Wilson loops with overlap fermions: the   b-quark mass shift, and the quark-antiquark potential
  We compute, to two loops in pertubation theory, the fermionic contribution to rectangular RxT Wilson loops, for different values of R and T.   We use the overlap fermionic action. We also employ the clover action, for comparison with existing results in the literature.   In the limit R, T -> Infinity our results lead to the shift in the b-quark mass. We also evaluate the perturbative static potential as T -> Infinity. 
A. Athenodorou and H. Panagopoulos (Dept. of Physics, University of   Cyprus, Nicosia)