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We derive the exchange currents of pseudoscalar, vector, and scalar mesonsfrom Feynman diagrams, and use them to calculate the magnetic form factors ofnucleon and $\Delta(1232)$. The magnetic moments and electromagnetic radii areobtained by using those form factors and the parameters determined from themasses of nucleon and $\Delta(1232)$. We find the magnetic moments andelectromagnetic radii of nucleon and $\Delta(1232)$ can be produced very wellin the extended Goldstone-boson-exchange model (GBE) in which all ofpseudoscalar, vector and scalar meson nonet are included. The magnetic momentsof $\Delta(1232)$ are closer to experiment values and results from latticecalculation than the results obtained by the model without other mesons exceptfor pion and sigma.Comment: 15 pages,5 figure

Magnetic Moments and Electromagnetic Radii of Nucleon and Δ(1232) in an Extended Goldstone–Boson-Exchange Model