Interpretation of the newly discovered $\Omega$(2012)

Abstract

Very recently Belle Collaboration reported observation of a narrow state called $\Omega (2012)$ with mass $2012.4\pm 0.7$~(stat)~$\pm 0.6$(syst)~MeV and width $6.4_{-2.0}^{+2.5}$~(stat)~$\pm 1.6$~(syst)~MeV. We calculate the mass and residue of $\Omega (2012)$ state by employing the QCD sum rule method. Comparison of the obtained results with the experimental data allows us to interpret this state as $1P$ orbital excitation of the ground state $\Omega$ baryon, i.e. with quantum numbers $J^P={\frac{3}{2}}^{-}$.

6 Pages, 2 Figures and 1 Table

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Cited by in corpus (26)

• $\Omega$ baryon spectrum and their decays in a constituent quark model
• The $\Omega (2012)$ as a hadronic molecule
• Coupled channels dynamics in the generation of the $\Omega (2012)$ resonance
• Hadronic molecular assignment for the newly observed ${\Omega }^{\ast }$ state
• 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
• Nature of the $\Omega$(2012) through 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
• 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?
• Analysis of $\Omega (2012)$ as a molecule in the chiral quark model
• Understanding the nature of $\Omega (2012)$ in a coupled-channel approach
• Further understanding the nature of $\Omega (2012)$ within a 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 $\Xi \bar{K}$
• Strong coupling constants and radiative decays of the heavy tensor mesons
• Identifying triple-strangeness $\Omega$ hyperons in light of recent experimental results
• Structure of the ${\Omega }^{-}(2012)$ with Hamiltonian Effective Field Theory
• Observation of the $\Omega$(2012) baryon at the LHC
• Baryons and baryoniums in the perspective of QCD sum rules
• Investigation on the $\Omega (2012)$ from QCD sum rules