Universality of certain nonrenormalizable contributions in two-dimensional quantum field theory

M. Caselle, K. Pinn
1996 Physical Review D, Particles and fields  
We consider the question of removing the ultraviolet cutoff in a 2D Quantum Field Theory with an interaction term which is non-renormalizable by power counting. This model arises as the first non-trivial correction beyond the Gaussian approximation of the so called Capillary Wave or Drumhead Model, and is rather important from a physical point of view since it correctly describes the finite size effects of two-dimensional interfaces. Despite the fact that the interaction is non-renormalizable,
more » ... e prove that for a large class of regularization schemes the finite and divergent parts can be separated in a simple way. Furthermore, the finite part is independent of the choice of cutoff prescription used.
doi:10.1103/physrevd.54.5179 pmid:10021207 fatcat:uc34emexwrhi7ifg2cefz7mrk4