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

dc.contributor.author	Oettel, M.	en
dc.contributor.author	Alkofer, Reinhard	en
dc.date.issued	2003	en
dc.description	Copyright © 2002 Springer-Verlag. Submitted to Cornell University’s online archive www.arXiv.org in 2002 by Reinhard Alkofer. Post-print sourced from www.arxiv.org.	en
dc.description.abstract	In treating the relativistic 3–quark problem, a dressed–quark propagator parameterization is used which is compatible with recent lattice data and pion observables. Furthermore 2–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 GE and the nucleon magnetic moments are described correctly, the neutron electric form factor and the ratio GE/GM for the proton appear to be quenched. The influence of vector mesons on the form factors is investigated which amounts to a 25 % modification of the electromagnetic proton radii within this framework.	en
dc.identifier.citation	European Physical Journal A, 2003; 16:95-109	en
dc.identifier.doi	10.1140/epja/i2002-10070-4	en
dc.identifier.issn	1434-6001	en
dc.identifier.uri	http://hdl.handle.net/2440/10968
dc.language.iso	en	en
dc.publisher	Springer-Verlag	en
dc.title	Nucleon form factors from a covariant quark core: Limits in their description	en
dc.type	Journal article	en

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