Strong decays of the hadronic molecule Ω* (2012)

Abstract

Abstract Strong two- and three-body decays of the new excited hyperon Ω*(2012) are discussed in the hadronic molecular approach. The Ω*(2012) state is considered to contain the mixed Ξ * K ̄ and Ωη hadronic components. In our calculations we use a phenomenological hadronic Lagrangian for description of interaction of the Ω*(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 Ω * ( 2012 ) → Ξ K ̄ lie in the few MeV region and are compatible with or dominate over the rates of the three-body modes Ω * ( 2012 ) → Ξ π K ̄ . The sum of two- and three-body decay widths is consistent with a width of the Ω*(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 Ωη hadronic component in the Ω*(2012) state.