1999/12/10 by N. J. Watson, Watson, N. J.
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #hep-ph
paper · pdf · doi:10.48550/arxiv.hep-ph/9912303
12 pages, 6 figures. Talk given at the conference ``Physical Variables in Gauge Theories'', Dubna, 21-25 Sept., 1999. To appear in the proceedings
arxiv created 1999/12/10 · arxiv updated 2009/11/30
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.