Infra-Red Finite Charge Propagation
High Energy Physics - Phenomenology
2009-10-30 v1 High Energy Physics - Theory
Abstract
The Coulomb gauge has a long history and many uses. It is especially useful in bound state applications. An important feature of this gauge is that the matter fields have an infra-red finite propagator in an on-shell renormalisation scheme. This is, however, only the case if the renormalisation point is chosen to be the static point on the mass shell, p = (m, 0, 0, 0). In this letter we show how to extend this key property of the Coulomb gauge to an arbitrary relativistic renormalisation point. This is achieved through the introduction of a new class of gauges of which the Coulomb gauge is a limiting case. A physical explanation for this result is given.
Keywords
Cite
@article{arxiv.hep-ph/9706515,
title = {Infra-Red Finite Charge Propagation},
author = {Emili Bagan and Bartomeu Fiol and Martin Lavelle and David McMullan},
journal= {arXiv preprint arXiv:hep-ph/9706515},
year = {2009}
}
Comments
8 pages, plain TeX, to appear in Modern Physics Letters A