On the nature of the newly discovered ${\mathrm{\Omega }}_c^0$ states

The masses and residues of the radially excited heavy ${\mathrm{\Omega }}_c^0$ and ${\mathrm{\Omega }}_b^{-}$ baryons with spin-parity $J^P={\frac{1}{2}}^{+}$ and $J^{P}= \frac{3}{2}^{+}$ are calculated by means of QCD two-point sum rule method using the general form of their interpolating currents. In calculations the quark, gluon and mixed vacuum condensates up to ten dimensions are taken into account. In ${\mathrm{\Omega }}_c^0$ channel a comparison is made with the narrow excited states recently observed by the LHCb Collaboration.