Radially ExcitedSU(3)-Multiplets and Baryon Resonance Classification

in total rc± P cross-sections and in backward rc± P scattering. Nine new resonances have thus been reported as established. At the present stage, there may be some ambiguities about the umqueness of the solutions of the phase shift analysis and these resonances. Nevertheless, we assume that the above n-N resonances stand on an equal footing with the already-known resonances. We consider that it is worthwhile to try to classify nucleonic resonances for two reasons. First, the classification of the excited baryon states is one of the most interesting problems to clarify the internal structure of resonances (or elementary particles), in relation to the com posite model (for example, symmetric harmonic oscillator model) and Regge theory. Secondly, if the spin-parity assignment for nucleonic resonances is made correctly, the classification of other strange resonances which have not yet been clarified experimentally could be made more quantitatively by using the SU(3) theory. On the other hand, possible existence of resonances with radial excitations has been reported. 5 ) We assume the existence of such radially excited resonances and try to classify the nucleonic resonances on the basis of the symmetric three