1
The third uncertainty is due to the uncertainty in the ${{\mathit \Xi}_{{{c}}}^{+}}$ mass, taken to be the PDG 2022 fit result $2467.71$ $\pm0.23$ MeV.
2
Measured via ${{\mathit \Omega}_{{{b}}}^{-}}$ $\rightarrow$ ${{\mathit \Omega}_{{{c}}}^{**0}}{{\mathit \pi}^{-}}$ $\rightarrow$ ${{\mathit \Xi}_{{{c}}}^{+}}{{\mathit K}^{-}}{{\mathit \pi}^{-}}$. The third uncertainty is due to the uncertainty in the ${{\mathit \Xi}_{{{c}}}^{+}}$ mass.