Gauge-invariant resummation formalism for two-point correlation functions
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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

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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.rights.uri info:eu-repo/semantics/openAccess
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 info:eu-repo/semantics/article
dc.date.updated 2015-04-10T08:02:43Z
dc.identifier.doi http://dx.doi.org/10.1103/PhysRevD.54.5315
dc.identifier.idgrec 091130

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