Measurement of branching fractions of hadronic decays of the Ωc0 baryon

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Abstract

Using a data sample of $980\text{ }\text{ }{\mathrm{fb}}^{\ensuremath{-}1}$ of ${e}^{+}{e}^{\ensuremath{-}}$ annihilation data taken with the Belle detector operating at the KEKB asymmetric-energy ${e}^{+}{e}^{\ensuremath{-}}$ collider, we report the results of a study of the decays of the ${\mathrm{\ensuremath{\Omega}}}_{c}^{0}$ charmed baryon into hadronic final states. We report the most precise measurements to date of the relative branching fractions of the ${\mathrm{\ensuremath{\Omega}}}_{c}^{0}$ into ${\mathrm{\ensuremath{\Omega}}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{0}$, ${\mathrm{\ensuremath{\Omega}}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$, ${\mathrm{\ensuremath{\Xi}}}^{\ensuremath{-}}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{+}$, and ${\mathrm{\ensuremath{\Xi}}}^{0}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$, as well as the first measurements of the branching fractions of the ${\mathrm{\ensuremath{\Omega}}}_{c}^{0}$ into ${\mathrm{\ensuremath{\Xi}}}^{\ensuremath{-}}{\overline{K}}^{0}{\ensuremath{\pi}}^{+}$, ${\mathrm{\ensuremath{\Xi}}}^{0}{\overline{K}}^{0}$, and $\mathrm{\ensuremath{\Lambda}}{\overline{K}}^{0}{\overline{K}}^{0}$, all with respect to the ${\mathrm{\ensuremath{\Omega}}}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$ decay. In addition, we investigate the resonant substructure of these modes. Finally, we present a limit on the branching fraction for the decay ${\mathrm{\ensuremath{\Omega}}}_{c}^{0}\ensuremath{\rightarrow}{\mathrm{\ensuremath{\Sigma}}}^{+}{K}^{\ensuremath{-}}{K}^{\ensuremath{-}}{\ensuremath{\pi}}^{+}$.

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