Ghost Poles in the Nucleon Propagator: Vertex Corrections and Form Factors

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dc.creatorKrein, G.
dc.creatorNielsen, M.
dc.creatorPuff, R. D.
dc.creatorWilets, L.
dc.date1993-03-15
dc.date.accessioned2026-07-07T11:14:58Z
dc.date.available2026-07-07T11:14:58Z
dc.descriptionVertex corrections are taken into account in the Schwinger-Dyson equation for the nucleon propagator in a relativistic field theory of fermions and mesons. The usual Hartree-Fock approximation for the nucleon propagator is known to produce the appearance of complex (ghost) poles which violate basic theorems of quantum field theory. In a theory with vector mesons there are vertex corrections that produce a strongly damped vertex function in the ultraviolet. One set of such corrections is known as the Sudakov form factor in quantum electrodynamics. When the Sudakov form factor generated by massive neutral vector mesons is included in the Hartree-Fock approximation to the Schwinger-Dyson equation for the nucleon propagator, the ghost poles disappear and consistency with basic requirements of quantum field theory is recovered.
dc.description18 pages
dc.identifierhttps://arxiv.org/abs/nucl-th/9303010
dc.identifierhttp://arxiv.org/abs/nucl-th/9303010
dc.identifierPhys.Rev.C47:2485-2491,1993
dc.identifierdoi:10.1103/PhysRevC.47.2485
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/192253
dc.subjectNuclear Theory
dc.titleGhost Poles in the Nucleon Propagator: Vertex Corrections and Form Factors
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