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