On the Physical Propagators of QED
High Energy Physics - Theory
2009-10-22 v1 High Energy Physics - Phenomenology
Abstract
The true variables in QED are the transverse photon components and Dirac's physical electron, constructed out of the fermionic field and the longitudinal components of the photon. We calculate the propagators in terms of these variables to one loop and demonstrate their gauge invariance. The physical electron propagator is shown not to suffer from infrared divergences in any gauge. In general, all physical Green's functions are gauge invariant and infrared-finite.
Cite
@article{arxiv.hep-th/9306131,
title = {On the Physical Propagators of QED},
author = {Martin Lavelle and David McMullan},
journal= {arXiv preprint arXiv:hep-th/9306131},
year = {2009}
}
Comments
7 pages, 2 figures (not included, may be obtained from the authors), MZ-TH/93-05, DIAS-STP-93-05