Breit-Wigner formalism for non-Abelian theories

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dc.creatorPapavassiliou, Joannis
dc.date2001-02-13
dc.date.accessioned2026-07-07T11:31:04Z
dc.date.available2026-07-07T11:31:04Z
dc.descriptionThe consistent description of resonant transition amplitudes within the framework of perturbative field theories necessitates the definition and resummation of off-shell Green's functions, which must respect several crucial physical requirements. In particular, the generalization of the usual Breit-Wigner formalism in a non-Abelian context constitutes a highly non-trivial problem, related to the fact that the conventionally defined Green's functions are unphysical. We briefly review the main field-theoretical difficulties arising when attempting to use such Green's functions outside the confines of a fixed order perturbative calculation, and explain how this task has been successfully accomplished in the framework of the pinch technique.
dc.description10 pages, plain Latex, 4 Figures in a separate ps. file; based on talk presented at ``50 Years of Electroweak Physics: A symposium in honor of Professor Alberto Sirlin's 70th Birthday'', New York University, New York, October 27-28, 2000
dc.identifierhttps://arxiv.org/abs/hep-ph/0102149
dc.identifierhttp://arxiv.org/abs/hep-ph/0102149
dc.identifierJ.Phys.G29:153-160,2003
dc.identifierdoi:10.1088/0954-3899/29/1/316
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/197150
dc.subjectHigh Energy Physics - Phenomenology
dc.titleBreit-Wigner formalism for non-Abelian theories
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