On the definition of the Δmass and width

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dc.creatorDjukanovic, D.
dc.creatorGegelia, J.
dc.creatorScherer, S.
dc.date2007-07-13
dc.date.accessioned2026-07-07T11:17:47Z
dc.date.available2026-07-07T11:17:47Z
dc.descriptionIn the framework of effective field theory we show that, at two-loop order, the mass and width of the Δresonance defined via the (relativistic) Breit-Wigner parametrization both depend on the choice of field variables. In contrast, the complex-valued position of the pole of the propagator is independent of this choice.
dc.description3 pages, 1 figure, REVTeX 4
dc.identifierhttps://arxiv.org/abs/0707.2030
dc.identifierhttp://arxiv.org/abs/0707.2030
dc.identifierPhys.Rev.D76:037501,2007
dc.identifierdoi:10.1103/PhysRevD.76.037501
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/193123
dc.subjectHigh Energy Physics - Phenomenology
dc.titleOn the definition of the Δmass and width
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