Observation of an excited ${\Omega }^{-}$ baryon

J. Yelton, I. Adachi, J. K. Ahn +189

Using data recorded with the Belle detector, we observe a new excited hyperon, an ${\Omega }^{\ast -}$ candidate decaying into ${\Xi }^0{K}^{-}$ and ${\Xi }^{-}{K}_S^0$ with a mass of $2012.4\pm0.7\ {\rm (stat)…