SU(6)_{W} and Baryon Resonances of Odd Parity
Abstract
An SU(6)_{W}symmetric dynamical model, used previously to predict quantum numbers and branching ratios of evenparity meson resonances, is extended to oddparity baryon resonances. It is assumed that meson exchange forces of the tensor type dominate. The relative sizes of the tensor forces in all mesonbaryon states are given by the assumed SU(6)_{W} symmetry. The matrix elements of the tensor forces corresponding to the lowest orbital angular momentum in oddparity states are SDwave transition elements. Those SD states in which the largest forces exist are assumed to resonate. SU(3) singlet states of j=12 and 32 are predicted; these may be identified with the 1405 and 1520MeV Y_{0}^{*} particles. The predicted octet resonances correspond to the two distinct fd ratios 1 and 13. The predicted results are compared with experimental data on the branching ratios of the 1660 and 1765MeV Y_{1}^{*} particles, and with the recent measurements of the relative phases of different K̄N>πΛ resonant amplitudes by Smart, Kernan, Kalmus, and Ely. Some experiments are suggested that would test the model further.
 Publication:

Physical Review
 Pub Date:
 January 1967
 DOI:
 10.1103/PhysRev.153.1503
 Bibcode:
 1967PhRv..153.1503C