Study of Ωc0 and Ωc∗0 baryons at Belle

We report results from a study of the charmed double strange baryons Ωc0 and Ωc∗0 at Belle. The Ωc0 is reconstructed using the Ωc0→Ω−π+ decay mode, and its mass is measured to be (2693.6±0.3−1.5+1.8)MeV/c2. The Ωc∗0 baryon is reconstructed in the Ωc0γ mode. The mass difference MΩc∗0−MΩc0 is measured to be (70.7±0.9−0.9+0.1)MeV/c2. The analysis is performed using 673 fb−1 of data on and near the ϒ(4S) collected with the Belle detector at the KEKB asymmetric-energy e+e− collider.