On the Universality of Certain Non-Renormalizable Contributions in Two-Dimensional Quantum Field Theory

Details On the Universality of Certain Non-Renormalizable Contributions in Two-Dimensional Quantum Field Theory On the Universality of Certain Non-Renormalizable Contributions in Two-Dimensional Quantum Field Theory

1996-02-27

arxiv.org/abs/hep-lat/9602026v1

Phys.Rev. D54 (1996) 5179-5184

Physics

High Energy Physics

High Energy Physics - Lattice

12 pages, LaTeX file, no figures

Scientific paper

10.1103/PhysRevD.54.5179

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, we 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.

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