Evidence forΞ*Resonance with Mass 1930 MeV

Abstract

Evidence is presented for the existence of a baryon with a strangeness $S=-2\mathrm{}$, mass $M=1930\mathrm{}\pm 20$ MeV, and width $\Gamma =80\mathrm{}\pm 40$ MeV. It is speculated that this resonance completes a $J^P={\frac{5}{2}}^{-}$ octet. An SU(3) analysis of the conjectured ${\frac{5}{2}}^{-}$ octet gives a reasonable overall description of the partial widths of the member states.