Mass Renormalization in Lorentz-violating Scalar Field Theory
  In this work we evaluate the $\gamma_{m}$ function corresponding to mass renormalization for O($N$) scalar field theory with Lorentz violation. We calculate this function up to two-loop order for a theory renormalized utilizing the counterterm method in the minimal subtraction scheme with Feynman diagrams regularized using dimensional regularization. 
Paulo R. S. Carvalho
hep-th math-ph math.MP