Gauge invariance in two-particle scattering
High Energy Physics - Phenomenology
2009-11-11 v2 Nuclear Theory
Abstract
It is shown how gauge invariance is obtained for the coupling of a photon to a two-body state described by the solution of the Bethe-Salpeter equation. This is illustrated both for a complex scalar field theory and for interaction kernels derived from chiral effective Lagrangians.
Keywords
Cite
@article{arxiv.hep-ph/0508307,
title = {Gauge invariance in two-particle scattering},
author = {B. Borasoy and P. C. Bruns and U. -G. Meißner and R. Nißler},
journal= {arXiv preprint arXiv:hep-ph/0508307},
year = {2009}
}
Comments
16 pages, 2 figures, references added and commented on