Examples of Feynman diagrams for the $\Omega _{ b c }^{0} \rightarrow \Lambda ^+_ c \pi ^- $, $\Omega _{ b c }^{0} \rightarrow \Xi _{ c }^{+} \pi ^- $, $\Xi _{ b c }^{0} \rightarrow \Lambda ^+_ c \pi ^- $ and $\Xi _{ b c }^{0} \rightarrow \Xi _{ c }^{+} \pi ^- $ decays.

Invariant mass distributions of selected (left) $ H_{ b c }^{0} \rightarrow \Lambda ^+_ c \pi ^- $ and (right) $ H_{ b c }^{0} \rightarrow \Xi _{ c }^{+} \pi ^- $ candidates (black points), together with results of the background only fit (brown dashed line).

Invariant mass distributions of (left) $\Lambda ^0_ b \rightarrow \Lambda ^+_ c (\rightarrow \ p K ^- \pi ^+ )\pi ^- $ and (right) $\Xi _{ b }^{0} \rightarrow \Xi _{ c }^{+} (\rightarrow \ p K ^- \pi ^+ )\pi ^- $ candidates with the fit results overlaid (blue solid line). The black points represent the data, the red dashed line represents the signal contribution, and the gray dashed line represents the combinatorial background.

Upper limits (dotted lines) on the ratio of production cross-section for $\Omega _{ b c }^{0}$ and $\Xi _{ b c }^{0}$ via decays to (left) $\Lambda ^+_ c $ $\pi ^-$ and (right) $\Xi _{ c }^{+}$ $\pi ^-$ to that of control channels $\Lambda ^0_ b \rightarrow \Lambda ^+_ c \pi ^- $ and $\Xi _{ b }^{0} \rightarrow \Xi _{ c }^{+} \pi ^- $ . The dotted (dashed) colored lines represent the observed (expected) upper limits. The assumed lifetime hypotheses for the $\Omega _{ b c }^{0}$ ( $\Xi _{ b c }^{0}$ ) are 0.2 $\text{ ps}$ (red filled circles), 0.3 $\text{ ps}$ (blue triangles), and 0.4 $\text{ ps}$ (magenta open circles).

Animated gif made out of all figures.

Sources of systematic uncertainty obtained for an $ H_{ b c }^{0}$ mass of 6900 $\text{ Me V /}c^2$ and lifetime of 0.4 $\text{ ps}$ . The total is the quadratic sum of the individual systematic uncertainties.