Gauge-invariance and unstable particles
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Gauge-invariance and unstable particles

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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.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.rights.uri info:eu-repo/semantics/openAccess
dc.source Papavassiliou, Joannis Pilaftsis, Apostolos 1995 Gauge-invariance and unstable particles Physical Review Letters 75 17 3060 3063
dc.subject Física
dc.title Gauge-invariance and unstable particles
dc.type info:eu-repo/semantics/article
dc.date.updated 2015-04-10T07:57:52Z
dc.identifier.doi http://dx.doi.org/10.1103/PhysRevLett.75.3060
dc.identifier.idgrec 091124

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