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Magnetic moments and electromagnetic radii of nucleon and $Δ(1232)$ in an extended GBE model

Jun He·Yu-Bing Dong
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Abstract

We derive the exchange currents of pseudoscalar, vector, and scalar mesons from Feynman diagrams, and use them to calculate the magnetic form factors of nucleon and $Δ(1232)$. The magnetic moments and electromagnetic radii are obtained by using those form factors and the parameters determined from the masses of nucleon and $Δ(1232)$. We find the magnetic moments and electromagnetic radii of nucleon and $Δ(1232)$ can be produced very well in the extended Goldstone-boson-exchange model (GBE) in which all of pseudoscalar, vector and scalar meson nonet are included. The magnetic moments of $Δ(1232)$ are closer to experiment values and results from lattice calculation than the results obtained by the model without other mesons except for pion and sigma.

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Jun He, Yu-Bing Dong. 2004-04-06. Magnetic moments and electromagnetic radii of nucleon and $Δ(1232)$ in an extended GBE model. https://doi.org/10.1088/0253-6102%2F43%2F1%2F027

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