Possibility of a ninth JP=12+ baryon

Possibility of a ninth JP=12+ baryon Article

Slaughter, MD, Oneda, S. (1976). Possibility of a ninth JP=12+ baryon . PHYSICAL REVIEW D, 14(3), 799-808. 10.1103/PhysRevD.14.799

It is shown that (i) the small but definite discrepancy between the mass-squared Gell-Mann-Okubo mass formula of the 12+ baryons and experiment, (ii) the trouble of the - degeneracy, and (iii) the deviation of the DF ratio of the axial-vector semileptonic couplings from the SU(6) value as indicated by the value |GAGV|=0.435 0.035 of the latest high-statistics experiment on the -n+e-+ decay as compared with the SU(6) value 0.25, can be explained simultaneously if a ninth I=0, 12+ baryon exists around 1700 MeV with a broad width of about 1 GeV. The hyperon semileptonic decays in the presence of the are analyzed in detail. The Cabibbo angles are determined to be sin V=0.227 0.008 and sin A=0.220 0.020. The theoretical frameworks used are asymptotic SU(3), chiral SU(3)SU(3) charge algebra, and the simple mechanism of symmetry breaking. © 1976 The American Physical Society.