The pinch technique approach to gauge-independent n-point functions

Details The pinch technique approach to gauge-independent n-point functions The pinch technique approach to gauge-independent n-point functions

1999-12-10

arxiv.org/abs/hep-ph/9912303v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

12 pages, 6 figures. Talk given at the conference ``Physical Variables in Gauge Theories'', Dubna, 21-25 Sept., 1999. To appea

Scientific paper

The pinch technique (PT) is an algorithm for the rearrangement of contributions to conventional, gauge-dependent n-point functions in gauge theories to obtain a formulation of one-loop perturbation theory in terms of ``effective'' n-point functions which, principle among many other desirable properties, are individually entirely independent of the particular gauge-fixing procedure used. The aim of this talk is to give an introductory account of (i) the phenomenological motivations for the PT approach, (ii) the PT algorithm, including the principle properties of the PT n-point functions, (iii) an example application, and (iv) recent progress in extending the PT beyond the one-loop level.

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