Two-Loop Gap Equations for the Magnetic Mass
  One-loop gap equations have recently been used by several authors to estimate the non-perturbative mass gap in a 3-dimensional gauge theory. I extend the method to two loops and demonstrate, that the resulting gap equation has a real and positive solution $m \simeq 0.34 g^2$, which is in good agreement with the one-loop results and lattice data. 
Frank Eberlein (DESY)