Pole Mass, Width, and Propagators of Unstable Fermions

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dc.creatorKniehl, Bernd A.
dc.creatorSirlin, Alberto
dc.date2008-01-04
dc.date.accessioned2026-07-07T11:55:00Z
dc.date.available2026-07-07T11:55:00Z
dc.descriptionThe concepts of pole mass and width are extended to unstable fermions in the general framework of parity-nonconserving gauge theories, such as the Standard Model. In contrast with the conventional on-shell definitions, these concepts are gauge independent and avoid severe unphysical singularities, properties of great importance since most fundamental fermions in nature are unstable particles. General expressions for the unrenormalized and renormalized dressed propagators of unstable fermions and their field-renormalization constants are presented.
dc.description9 pages
dc.identifierhttps://arxiv.org/abs/0801.0669
dc.identifierhttp://arxiv.org/abs/0801.0669
dc.identifierPhys.Rev.D77:116012,2008
dc.identifierdoi:10.1103/PhysRevD.77.116012
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/205109
dc.subjectHigh Energy Physics - Theory
dc.subjectHigh Energy Physics - Phenomenology
dc.titlePole Mass, Width, and Propagators of Unstable Fermions
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