Strong decays of the hadronic molecule Ω∗ (2012)

Thomas Gutsche, Valery E. Lyubovitskij

Research output: Contribution to journalArticlepeer-review


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 ∗ 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) →K lie in the few MeV region and are compatible with or dominate over the rates of the three-body modes Ω ∗(2012)→ηK.. 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.

Original languageEnglish
Article number025001
JournalJournal of Physics G: Nuclear and Particle Physics
Issue number2
Publication statusPublished - 16 Dec 2020


  • baryons
  • composite particles
  • hadronic molecules
  • mesons
  • strong decays

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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