On the Definition of Gauge Field Operators in Lattice Gauge-Fixed   Theories
  We address the problem of defining the gauge four-potential on the lattice, in terms of the natural link variables. Different regularized definitions are shown, through non perturbative numerical computation, to converge towards the same continuum renormalized limit. 
L. Giusti(1,2), M. L. Paciello(3), S. Petrarca(3,4), B. Taglienti(3),   M. Testa (3,4,5) ((1) Scuola Normale Superiore Pisa ...