Anomalous dimensions of gauge-invariant amplitudes in massless effective   gauge theories of strongly correlated systems
  We use the radial gauge to calculate the recently proposed ansatz for the physical electron propagator in such effective models of strongly correlated electron systems as the $QED_3$ theory of the pseudogap phase of the cuprates. The results of our analysis help to settle the recent dispute about the sign and the magnitude of the anomalous dimension which characterizes the gauge invariant amplitude in question and set the stage for computing other, more physically relevant, ones. 
V. P. Gusynin, D. V. Khveshchenko, and M. Reenders