Nucleon form factors from a covariant quark core: limits in their description

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dc.creatorOettel, M.
dc.creatorAlkofer, R.
dc.date2002-04-16
dc.date.accessioned2026-07-07T11:09:14Z
dc.date.available2026-07-07T11:09:14Z
dc.descriptionIn treating the relativistic three-quark problem, a dressed-quark propagator parameterization is used which is compatible with recent lattice data and pion observables. Furthermore two-quark correlations are modeled as a series of quark loops in the scalar and axialvector channel. The resulting reduced Faddeev equations are solved for nucleon and delta. Nucleon electromagnetic form factors are calculated in a fully covariant and gauge--invariant scheme. Whereas the proton electric form factor $G_E$ and the nucleon magnetic moments are described correctly, the neutron electric form factor and the ratio $G_E/G_M$ for the proton appear to be quenched. The influence of vector mesons on the form factors is investigated which amounts to a 25 percent modification of the electromagnetic proton radii within this framework.
dc.description28 pages, 10 figures, 4 tables
dc.identifierhttps://arxiv.org/abs/hep-ph/0204178
dc.identifierhttp://arxiv.org/abs/hep-ph/0204178
dc.identifierEur.Phys.J.A16:95-109,2003
dc.identifierdoi:10.1140/epja/i2002-10070-4
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/190399
dc.subjectHigh Energy Physics - Phenomenology
dc.subjectNuclear Theory
dc.titleNucleon form factors from a covariant quark core: limits in their description
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