Strong decays of the hadronic molecule Ω*(2012)

Strong two- and three-body decays of the new excited hyperon Omega*(2012) are discussed in the hadronic molecular approach. The Omega*(2012) state is considered to contain the mixed. Xi* (K) over bar and Omega eta hadronic components. In our calculations we use a phenomenological hadronic Lagrangian for description of interaction of the Omega*(2012) state with constituents and of constituents to other hadrons occurring in the final state. Our results show that the decay widths of the two-body decay modes Omega*(2012) -> Xi(K) over bar lie in the few MeV region and are compatible with or dominate over the rates of the three-body modes Omega*(2012) -> Xi pi(K) over bar. The sum of two- and three-body decay widths is consistent with a width of the Omega*(2012) originally measured by the Belle collaboration. A possible scenario for the suppression of the three-body decay rate recently noticed by the Belle collaboration is due to the dominant admixture of the Omega eta hadronic component in the Omega*(2012) state.

Automated summary

The study discusses the strong two- and three-body decays of the new excited hyperon Omega*(2012) in the hadronic molecular approach. Results show that the decay widths of the two-body decay modes are compatible with or dominate over the rates of the three-body modes. The suppression of the three-body decay rate may be due to the dominant admixture of the Omega eta hadronic component in the Omega*(2012) state.