ELECTROMAGNETIC PROPERTIES OF THE NUCLEON IN THE NJL MODEL WITH VECTOR AND AXIAL-VECTOR MESONS

The soliton solution and its quantization are investigated in the NJL model with rho and A(1) mesons. Excitation spectra of the time compone nts of the vector mesons exist during the collective quantization. The resulting equations of motion, which are integral equations, are solv ed by making the radial coordinates discrete. The major effect of the these spectra is to reduce the moment of the inertia, which becomes qu ite small compared to the case without axial vectors. The electromagne tic properties of the nucleon ale studied for various constituent quar k masses which include the regions of both the valence picture and the purely sea quark picture of the soliton in this model. The magnetic m oments turn out to be too small generally. Several problems related to the vector mesons are discussed.