Observation of a Narrow State Decaying into ${\Xi }_c^{+}{\pi }^{-}$

Abstract

Using data recorded by the CLEO-II detector at CESR, we report the first observation of a narrow state decaying into ${\Xi }_c^{+}{\pi }^{-}$. The state has mass difference $M({\Xi }_c^{+}{\pi }^{-})-M({\Xi }_c^{+})$ of $178.2\pm 0.5\pm 1.0$ $MeV/{\mathrm{c}}^2$, and a width of $<5.5$ $MeV/{\mathrm{c}}^2$ (90\% confidence level limit). The most likely explanation of this new state is that it is the $J=\32$ spin excitation of the ${\Xi }_c^0$ charmed baryon.

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References in corpus (1)

• Charmed Baryons with $J=3/2$

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