Abstract
The interactions of baryons and their resonances are investigated on the basis of a relativistic composite model in terms of the B-S amplitudes. By imposing appropriate con ditions, the B-S amplitudes are constructed, which are different from those obtained by a method of SU(6) or U(12) symmetry. This difference may be attributed partially to the effects of interactions and relative motion of urbaryons. From the analysis of various inter actions, it is shown that these effects are absorbed in a simplified form of B-S amplitudes as if they were small. The absolute values of magnetic moments, NN1r coupling constant and N* N1r coupling constant are calculated in good agreement with experiment. The experimental branching ratios of P-decay are also reproduced by our approach.
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