Nature of the $\Omega$(2012) through its strong decays

Abstract

We extend our previous analysis on the mass of the recently discovered $\Omega (2012)$ state by investigation of its strong decays and calculation of its width employing the method of light cone QCD sum rule. Considering two possibilities for the quantum numbers of $\Omega (2012)$ state, namely $1P$ orbital excitation with $J^P={\frac{3}{2}}^{-}$ and $2S$ radial excitation with $J^P={\frac{3}{2}}^{+}$, we obtain the strong coupling constants defining the $\Omega (1P/2S)\to \Xi K$ decays. The results of the coupling constants are then used to calculate the decay width corresponding to each possibility. Comparison of the obtained results on the total widths in this work with the experimental value and taking into account the results of our previous mass prediction on the $\Omega (2012)$ state, we conclude that this state is $1P$ orbital excitation of the ground state $\Omega$ baryon, whose quantum numbers are $J^P={\frac{3}{2}}^{-}$.

8 Pages, 2 Figures and 3 Tables

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Cited by in corpus (19)

• $\Omega$ baryon spectrum and their decays in a constituent quark model
• 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
• 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 ${\Omega }^{\ast }(2012)$
• Further understanding the nature of $\Omega (2012)$ within a chiral quark model
• Reanalysis of the newly observed ${\Omega }^{\ast }$ state in hadronic molecule model
• Understanding the nature of $\Omega (2012)$ in a coupled-channel approach
• 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
• Structure of the ${\Omega }^{-}(2012)$ with Hamiltonian Effective Field Theory
• Nucleon resonances with spin $\frac{3}{2}$ and isospin $\frac{1}{2}$
• Observation of the $\Omega$(2012) baryon at the LHC
• Investigation on the $\Omega (2012)$ from QCD sum rules