Observation of the ${\Omega }_c^0$ Charmed Baryon at CLEO

Abstract

The CLEO experiment at the CESR collider has used 13.7 fb${}^{-1}$ of data to search for the production of the ${\Omega }_c^0$ (css-ground state) in $e^{+}{e}^{-}$ collisions at $\sqrt{s}\simeq 10.6$ {\rm GeV}. The modes used to study the ${\Omega }_c^0$ are ${\Omega }^{-}{\pi }^{+}$, ${\Omega }^{-}{\pi }^{+}{\pi }^0$, ${\Xi }^{-}{K}^{-}p{i}^{+}{\pi }^{+}$, ${\Xi }^0{K}^{-}p{i}^{+}$, and ${\Omega }^{-}{\pi }^{+}{\pi }^{-}{\pi }^{+}$. We observe a signal of 40.4$\pm$9.0(stat) events at a mass of 2694.6$\pm$2.6(stat)$\pm$1.9(syst) {\rm MeV/$c^2$}, for all modes combined.

10 pages postscript, also available through http://w4.lns.cornell.edu/public/CLNS