Radiative Corrections for the Gauged Thirring Model in Causal Perturbation Theory
High Energy Physics - Theory
2011-09-13 v2
Abstract
We evaluate the one-loop fermion self-energy for the gauged Thirring model in (2+1) dimensions, with one massive fermion flavor, in the framework of the causal perturbation theory. In contrast to QED, the corresponding two-point function turns out to be infrared finite on the mass shell. Then, by means of a Ward identity, we derive the on-shell vertex correction and discuss the role played by causality for nonrenormalizable theories.
Keywords
Cite
@article{arxiv.hep-th/9804048,
title = {Radiative Corrections for the Gauged Thirring Model in Causal Perturbation Theory},
author = {L. A. Manzoni and B. M. Pimentel and J. L. Tomazelli},
journal= {arXiv preprint arXiv:hep-th/9804048},
year = {2011}
}
Comments
LaTex, 09 pages, no figures. Title changed and introduction enlarged. To be published in Eur. Phys. J. C