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Effective Charges in Non-Abelian Gauge Theories

N. J. Watson
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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.

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N. J. Watson. 1995-06-09. Effective Charges in Non-Abelian Gauge Theories. https://arxiv.org/abs/hep-ph/9506276

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