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

CLEO Collaboration, P. Avery et al

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(Ξ_c^+π^-)-M(Ξ_c^+)…