Strong decays of the hadronic molecule ${\Omega }^{\ast }(2012)$

Abstract

Strong two- and three-body decays of the new excited hyperon ${\Omega }^{\ast }(2012)$ are discussed in the hadronic molecular approach. The ${\Omega }^{\ast }(2012)$ state is considered to contain the mixed $\Xi \bar{K}$ and $\Omega \eta$ hadronic components. In our calculations we use a phenomenological hadronic Lagrangian describing the coupling of the bound states to its constituents and of the constituents to other hadrons occurring in the final state. Our results show that the decay widths of the two-body decay modes ${\Omega }^{\ast }(2012)\to \Xi \bar{K}$ lie in the few MeV region and are compatible with or dominate over the rates of the three-body modes ${\Omega }^{\ast }(2012)\to \Xi \pi \bar{K}$. The sum of two- and three-body decay widths is consistent with a width of the ${\Omega }^{\ast }(2012)$ 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 ${\Omega }^{\ast }(2012)$ state.

References in corpus (21)

• Electromagnetic excitation of the Delta(1232)-resonance
• Hadronic molecule structure of the Y(3940) and Y(4140)
• Estimate for the X(3872) to gamma J/psi decay width
• X(3872) as a hadronic molecule and its decays to charmonium states and pions
• D* K molecular structure of the Ds1(2460) meson
• Xi and Omega baryons in the Skyrme model
• Radiative decay of Lambdac(2940)+ in a hadronic molecule picture
• Strangeness -2 and -3 Baryons in a Constituent Quark Model
• Octet-baryon axial-vector charges and SU(3)-breaking effects in the semileptonic hyperon decays
• Decays of Zb(+) and Zb'(+) as hadronic molecules
• Molecular structure of the Bs0*(5725) and Bs1(5778) bottom-strange mesons
• f0(980) meson as a K bar K molecule in a phenomenological Lagrangian approach
• Charmed baryon Sigmac(2800) as a ND hadronic molecule
• Strong and radiative decays of the scalars f0(980) and a0(980) in a hadronic molecule approach
• $\Omega$ baryon spectrum and their decays in a constituent quark model
• Strong three-body decays of Lambdac(2940)+
• Phenomenological Lagrangian approach to the electromagnetic deuteron form factors
• Low-lying $\Omega$ states with negative parity in an extended quark model with Nambu-Jona-Lasinio interaction
• Weak decays of heavy hadron molecules involving the f0(980)
• Two-photon decay of heavy hadron molecules
• Hadronic Molecules and the f0(980)/a0(980)

Cited by in corpus (10)

• Interpretation of the ${\Omega }_c\to {\pi }^{+}\Omega (2012)\to {\pi }^{+}(\bar{K}\Xi )$ relative to ${\Omega }_c\to {\pi }^{+}\bar{K}\Xi$ from the $\Omega (2012)$ molecular perspective
• Understanding the nature of $\Omega (2012)$ in a coupled-channel approach
• Analysis of $\Omega (2012)$ as a molecule in the chiral quark model
• Further understanding the nature of $\Omega (2012)$ within a chiral quark model
• Observation of $\Omega (2012{)}^{-}\to \Xi (1530)\bar{K}$ and measurement of the effective couplings of $\Omega (2012{)}^{-}$ to $\Xi (1530)\bar{K}$ and $\Xi \bar{K}$
• Identifying triple-strangeness $\Omega$ hyperons in light of recent experimental results
• Evidence for Two Excited ${\Omega }^{-}$ Hyperons
• Structure of the ${\Omega }^{-}(2012)$ with Hamiltonian Effective Field Theory
• Observation of the $\Omega$(2012) baryon at the LHC
• Investigation on the $\Omega (2012)$ from QCD sum rules