Production and Decay of ${\Omega }_c^0$

We present an analysis of inclusive ${\Omega }_c^0$ baryon production and decays in $230.5{\mathrm{fb}}^{-1}$ of data recorded with the BABAR detector. ${\Omega }_c^0$ baryons are reconstructed in four final states (${\Omega }^{-}{\pi }^{+}$, ${\Omega }^{-}{\pi }^{+}{\pi }^0$, ${\Omega }^{-}{\pi }^{+}{\pi }^{+}{\pi }^{-}$, ${\Xi }^{-}{K}^{-}{\pi }^{+}{\pi }^{+}$) and the corresponding ratios of branching fractions are measured. We also measure the momentum spectrum in the $e^{+}{e}^{-}$ center-of-mass frame. From the spectrum, we observe ${\Omega }_c^0$ production from $B$ decays and in $c\overline{c}$ events, and extract the two rates of production.

Figure 1

The invariant mass spectra for candidates passing the selection criteria. The data are fit with a double Gaussian line shape on a linear background.

Figure 2

The background-subtracted and efficiency-corrected ${\Omega }_c^0{p}^{*}$ spectrum. The black points represent the data, with vertical error bars giving the sum in quadrature of statistical and uncorrelated systematic uncertainties. The solid histogram shows the Bowler fragmentation function, binned and fit to the data for $p^{*}>2\mathrm{GeV}/c$ (vertical, dashed line).