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Gauge-invariant resummation formalism for two-point correlation functions

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Gauge-invariant resummation formalism for two-point correlation functions

dc.contributor.author	Papavassiliou, Joannis
dc.contributor.author	Pilaftsis, Apostolos
dc.date.accessioned	2015-04-10T08:02:42Z
dc.date.available	2015-04-10T08:02:42Z
dc.date.issued	1996
dc.identifier.uri	http://hdl.handle.net/10550/42988
dc.description.abstract	The consistent description of unstable particles, renormalons, or other Schwinger--Dyson-type of solutions within the framework of perturbative gauge field theories necessitates the definition and resummation of off-shell Green's functions, which must respect several crucial physical requirements. A formalism is presented for resummation of off-shell two-point correlation functions, which is mainly based on arguments of analyticity, unitarity, gauge invariance and renormalizability. The analytic results obtained with various methods, including the background field gauges and the pinch technique are confronted with the physical requirements imposed; to one-loop order the pinch technique approach satisfies all of them. Using renormalization group arguments, we discuss issues of uniqueness of the resummation procedure related to the latter method.
dc.language.iso	eng
dc.relation.ispartof	Physical Review D, 1996, vol. 54, num. 8, p. 5315-5335
dc.source	Papavassiliou, Joannis Pilaftsis, Apostolos 1996 Gauge-invariant resummation formalism for two-point correlation functions Physical Review D 54 8 5315 5335
dc.subject	Física
dc.title	Gauge-invariant resummation formalism for two-point correlation functions
dc.type	journal article	es_ES
dc.date.updated	2015-04-10T08:02:43Z
dc.identifier.doi	http://dx.doi.org/10.1103/PhysRevD.54.5315
dc.identifier.idgrec	091130
dc.rights.accessRights	open access	es_ES