1995/06/09 by N. J. Watson, N.J. Watson, Watson, N. J.
Physics and Astronomy · #Cosmology and Gravitation Theories #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Physics of Superconductivity and Magnetism #Quantum Electrodynamics and Casimir Effect #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9506276
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
arxiv created 1995/06/09 · openalex publication_date 1995/06/09 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.