Coupled channels dynamics in the generation of the $\Omega (2012)$ resonance

Abstract

We look into the newly observed $\Omega (2012)$ state from the molecular perspective in which the resonance is generated from the $\bar{K}{\Xi }^{\ast }$, $\eta \Omega$ and $\bar{K}\Xi$ channels. We find that this picture provides a natural explanation of the properties of the $\Omega (2012)$ state. We stress that the molecular nature of the resonance is revealed with a large coupling of the $\Omega (2012)$ to the $\bar{K}{\Xi }^{\ast }$ channel, that can be observed in the $\Omega (2012)\to \bar{K}\pi \Xi$ decay which is incorporated automatically in our chiral unitary approach via the use of the spectral function of ${\Xi }^{\ast }$ in the evaluation of the $\bar{K}{\Xi }^{\ast }$ loop function.

11 pages, 8 figures

References in corpus (8)

• Xi and Omega baryons in the Skyrme model
• Strangeness -2 and -3 Baryons in a Constituent Quark Model
• Unitary coupled channel analysis of the $\Lambda (1520)$ resonance
• A possible interpretation of the newly observed $\Omega (2012)$ state
• Hadronic molecular assignment for the newly observed ${\Omega }^{\ast }$ state
• 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
• Interpretation of the newly discovered $\Omega$(2012)
• Low-lying $\Omega$ states with negative parity in an extended quark model with Nambu-Jona-Lasinio interaction

Cited by in corpus (26)

• A Review on Partial-wave Dynamics with Chiral Effective Field Theory and Dispersion Relation
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• Emergence of molecular-type characteristic spectrum of hidden-charm pentaquark with strangeness embodied in the $P_{\psi s}^{\Lambda }(4338)$ and $P_{cs}(4459)$
• Search for $\Omega (2012)\to K\Xi (1530)\to K\pi \Xi$ at Belle
• Molecular picture for the $\Omega (2012)$ revisited
• Revisiting the $\Omega (2012)$ as a hadronic molecule and its strong decays
• The $T_{c\bar{s}}(2900)$ as a threshold effect from the interaction of the $D^{\ast }{K}^{\ast }$, $D_s^{\ast }\rho$ channels
• 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
• 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
• Further understanding the nature of $\Omega (2012)$ within a chiral quark model
• Analysis of $\Omega (2012)$ as a molecule in the chiral quark model
• Reanalysis of the newly observed ${\Omega }^{\ast }$ state in hadronic molecule 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
• The ${\Omega }_{cc}$ resonances with negative parity in the chiral constituent quark model
• Observation of the $\Omega$(2012) baryon at the LHC
• Radiative decays of the $\Omega (2012)$ as a hadronic molecule
• Interactions of the Pseudoscalar Meson Octet and the Baryon Decuplet in the Continuum and a Finite Volume
• Investigation on the $\Omega (2012)$ from QCD sum rules