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

Abstract

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 $2012.4\pm 0.7(\mathrm{stat})\pm 0.6(\mathrm{syst})\mathrm{MeV}/c^2$ and a width of $\Gamma =6.4_{-2.0}^{+2.5}(\mathrm{stat})\pm 1.6(\mathrm{syst})\mathrm{MeV}$. The ${\Omega }^{\ast -}$ is seen primarily in ${\rm Y}(1S),{\rm Y}(2S)$, and ${\rm Y}(3S)$ decays.

arXiv commentSubmitted to PRL

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Cited by in corpus (36)

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