Perturbative Description of the Fermionic Projector: Normalization, Causality and Furry's Theorem
Mathematical Physics
2014-05-14 v2 High Energy Physics - Theory
math.MP
Abstract
The causal perturbation expansion of the fermionic projector is performed with a contour integral method. Different normalization conditions are analyzed. It is shown that the corresponding light-cone expansions are causal in the sense that they only involve bounded line integrals. For the resulting loop diagrams we prove a generalized Furry theorem.
Keywords
Cite
@article{arxiv.1401.4353,
title = {Perturbative Description of the Fermionic Projector: Normalization, Causality and Furry's Theorem},
author = {Felix Finster and Jürgen Tolksdorf},
journal= {arXiv preprint arXiv:1401.4353},
year = {2014}
}
Comments
34 pages, LaTeX, 2 ancillary files, minor improvements (published version)