Resonances near thresholds and SU3 symmetry
A problem raised recently byOakes andYang is discussed within the framework of a nonrelativistic model. Arguments are presented for the purity of the wave-functions of the decuplet. The accuracy of the mass formula is discussed in terms of the widths of the resonances. A criterion is given for the applicability of the SU3 model to the calculation of cross sections and branching ratios.