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Nucléon Electromagnetic Form Factors in a constituent-quark model

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Published: Dec 5, 2019
DOI: https://doi.org/10.12681/hnps.2181
P. Demetriou
Insitute of Nuclear Physics. N. C. S. R. "Demokritos"
S. Boffi
Dipartimento di Fisica Nucleare e Teorica, Università di Pavia and INFN
M. Radici
Dipartimento di Fisica Nucleare e Teorica, Università di Pavia and INFN
R. F. Wagenbrunn
Dipartimento di Fisica Nucleare e Teorica, Università di Pavia and INFN
Abstract

The electromagnetic form factors of the nucléon are calculated in an extended chiral constituent-quark model where the effective interaction is described by the exchange of pseudoscalar and vector mesons belonging to the pseudoscalar and pseudovector octet, respectively, and a scalar meson . Two-body current-density operators, constructed consistently with the extended model Hamiltonian in order to preserve gauge invariance and current conservation, are found to give a significant contribution to the nucléon magnetic form factors and improve the estimates of the nucleon magnetic moments.

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