Gauge Invariance of Green Functions: Background-Field Method versus Pinch Technique

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dc.creatorDenner, A.
dc.creatorDittmaier, S.
dc.creatorWeiglein, G.
dc.date1994-06-01
dc.date.accessioned2026-07-07T10:58:05Z
dc.date.available2026-07-07T10:58:05Z
dc.descriptionApplication of the background-field method to QCD and the electroweak Standard Model yields gauge-invariant effective actions giving rise to simple Ward identities. Within this method, we calculate the quantities that have been treated in the literature using the pinch technique. Putting the quantum gauge parameter equal to one, we recover the pinch-technique results as a special case of the background-field method. The one-particle-irreducible Green functions of the background-field method fulfil for arbitrary gauge parameters the desirable theoretical properties that have been noticed within the pinch technique. Therefore the background-field formalism provides a general framework for the direct calculation of well-behaved Green functions. Within this formalism, the pinch technique appears as one of arbitrarily many equivalent possibilities.
dc.description10 pages, 2 figures (appended at the end of text as a compressed and uuencoded file), Latex, BI-TP.94/17
dc.identifierhttps://arxiv.org/abs/hep-ph/9406204
dc.identifierhttp://arxiv.org/abs/hep-ph/9406204
dc.identifierPhys.Lett.B333:420-426,1994
dc.identifierdoi:10.1016/0370-2693(94)90162-7
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/186978
dc.subjectHigh Energy Physics - Phenomenology
dc.titleGauge Invariance of Green Functions: Background-Field Method versus Pinch Technique
dc.typetext

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