Effective Charges in Non-Abelian Gauge Theories
High Energy Physics - Phenomenology
2007-05-23 v1
Abstract
The question of the definition of effective charges for non-abelian gauge theories is discussed, focusing in particular on both the pinch technique and background field method approaches. It is argued that there does exist a unique generalization of the QED concept of an effective charge to non-abelian theories, and that this generalization is given by the pinch technique. The discussion is set in the wider (and controversial) context of the definition of gauge-independent Green function-like quantities in general in such theories.
Cite
@article{arxiv.hep-ph/9506276,
title = {Effective Charges in Non-Abelian Gauge Theories},
author = {N. J. Watson},
journal= {arXiv preprint arXiv:hep-ph/9506276},
year = {2007}
}
Comments
18 pages, Latex macro included, talk given at the workshop ``Perspectives for Electroweak Interactions in e+e- Collisions'', Ringberg, Germany, Feb. 5-8, 1995, to appear in the proceedings