Evidence is presented confirming the existence of the $\Xi \mathrm{}\left(1815\right)\mathrm{}$ baryon with strangeness $S=-2\mathrm{}$ as well as two new $\Xi$ resonances with masses 2030±10 MeV and 2430±20 MeV, respectively. It is speculated that the $\Xi \mathrm{}\left(2030\right)\mathrm{}$ is a member of a ${\frac{5}{2}}^{+}$ octet, and an SU(3) analysis of the decay rates of the conjectured states is in reasonable agreement with the experimental data.

• Received 25 November 1968

DOI:https://doi.org/10.1103/PhysRevLett.22.79