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Gauge-invariance and unstable particles

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dc.contributor.author	Papavassiliou, Joannis
dc.contributor.author	Pilaftsis, Apostolos
dc.date.accessioned	2015-04-10T07:57:52Z
dc.date.available	2015-04-10T07:57:52Z
dc.date.issued	1995
dc.identifier.citation	Papavassiliou, Joannis Pilaftsis, Apostolos 1995 Gauge-invariance and unstable particles Physical Review Letters 75 17 3060 3063
dc.identifier.uri	http://hdl.handle.net/10550/42982
dc.description.abstract	A gauge-independent approach to resonant transition amplitudes with nonconserved external currents is presented, which is implemented by the pinch technique. The analytic expressions derived with this method are U(1)em invariant, independent of the choice of the gauge-fixing parameter, and satisfy a number of required theoretical properties, including unitarity. Although special attention is paid to resonant scatterings involving the γWW and ZWW vertices in the minimal Standard Model, our approach can be extended to the top quark or other unstable particles appearing in renormalizable models of new physics.
dc.language.iso	eng
dc.relation.ispartof	Physical Review Letters, 1995, vol. 75, num. 17, p. 3060-3063
dc.subject	Física
dc.title	Gauge-invariance and unstable particles
dc.type	journal article	es_ES
dc.date.updated	2015-04-10T07:57:52Z
dc.identifier.doi	10.1103/PhysRevLett.75.3060
dc.identifier.idgrec	091124
dc.rights.accessRights	open access	es_ES