Verification of the tenfold assignment of the baryon resonances

One of the more attractive aspects of the octet model(1) or “eightfold way” has been its ability to accommodate the N*, Y1*, and ≡* resonance in one isostrangeness multiplet, the (30)2. The (30) representation of SU3 is ten-dimensional as shown in Fig. 1. For this representation, the Okubo unitary mass formula(2,3) m=m0{1+aY+b[T(T+1)-1/4Y2]} (1) reduces to m=m0’(1+a’Y). (2