2003/10/24 by Marijan Ribaric, Luka Sustersic
Physics and Astronomy · #hep-th
published as Fizika B12 (2003) 275-284
arxiv created 2003/10/24 · arxiv updated 2009/12/01
We generalized the 't Hooft-Veltman method of unitary regulators to put forward a path-integral framework for finite, alternative theories to a given quantum field theory. And we demonstrated that the proposed framework is feasible by providing a finite alternative to the quantum field theory of a single, self-interacting real scalar field. Here we give two properties of self-energy that make the corresponding scattering matrix unitary. We show that the perturbative self-energy has these two properties at least up to the second order in the coupling constant.