Hadronic molecular assignment for the newly observed ${\Omega }^{\ast }$ state

Abstract

Very recently, a new ${\Omega }^{\ast }$ state was reported by the Belle Collaboration, with its mass of $2012.4\pm 0.7\text{(stat)}\pm 0.6\text{(syst)}\mathrm{MeV}$, which locates just below the $K{\Xi }^{\ast }$ threshold and hence hints to be a possible $K{\Xi }^{\ast }$ hadronic molecule. Using the effective Lagrangian approach as the same as our previous works for other possible hadronic molecular states, we investigate the decay behavior of this new ${\Omega }^{\ast }$ state within the hadronic molecular picture. The results show that the measured decay width can be reproduced well and its dominant decay channel is predicted to be the $K\pi \Xi$ three-body decay. This suggests that the newly observed ${\Omega }^{\ast }$ may be ascribed as the $J^P={3/2}^{-}$ $K{\Xi }^{\ast }$ hadronic molecular state and can be further checked through its $K\pi \Xi$ decay channel.

7pages, 6 figures

References in corpus (6)

• The Heavy Quark Spin Symmetry Partners of the X(3872)
• Observation of an excited ${\Omega }^{-}$ baryon
• A possible interpretation of the newly observed $\Omega (2012)$ state
• Interpretation of the newly discovered $\Omega$(2012)
• 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)

Cited by in corpus (28)

• QCD and the Strange Baryon Spectrum
• $\Omega$ baryon spectrum and their decays in a constituent quark model
• Coupled channels dynamics in the generation of the $\Omega (2012)$ resonance
• Hidden-charm pentaquarks with triple strangeness due to the ${\Omega }_c^{(\ast )}{\bar{D}}_s^{(\ast )}$ interactions
• Search for $\Omega (2012)\to K\Xi (1530)\to K\pi \Xi$ at Belle
• Strong decay modes $\bar{K}\Xi$ and $\bar{K}\Xi \pi$ of the $\Omega (2012)$ in the $\bar{K}\Xi (1530)$ and $\eta \Omega$ molecular scenario
• Molecular picture for the $\Omega (2012)$ revisited
• Revisiting the $\Omega (2012)$ as a hadronic molecule and its strong decays
• $\Omega (2012)$ through the looking glass of flavour SU(3)
• Theoretical study of the $\Omega (2012)$ state in the ${\Omega }_c^0\to {\pi }^{+}\Omega (2012{)}^{-}\to {\pi }^{+}(\bar{K}\Xi {)}^{-}$ and ${\pi }^{+}(\bar{K}\Xi \pi {)}^{-}$ decays
• Newly observed $X(4630)$: a new charmoniumlike molecule
• Spectroscopic Study of Strangeness=-3 ${\Omega }^{-}$ Baryon
• Toward discovering the excited $\Omega$ baryons through nonleptonic weak decays of ${\Omega }_c$
• Newly observed $\Omega (2012)$ state and strong decays of the low-lying $\Omega$ excitations
• 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
• Can $\Omega (2012)$ be explained as a molecular state?
• Strong decays of the hadronic molecule ${\Omega }^{\ast }(2012)$
• Understanding the nature of $\Omega (2012)$ in a coupled-channel approach
• Analysis of $\Omega (2012)$ as a molecule in the chiral quark model
• Reanalysis of the newly observed ${\Omega }^{\ast }$ state in hadronic molecule model
• $\rho \rho$ scattering revisited with coupled-channels of pseudoscalar mesons
• 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
• The ${\Omega }_{cc}$ resonances with negative parity in the chiral constituent quark model
• Production of the (predicted) $K^{\ast }(4307)$ in $B$ decays
• Observation of the $\Omega$(2012) baryon at the LHC
• Radiative decays of the $\Omega (2012)$ as a hadronic molecule