Can $\Omega (2012)$ be explained as a molecular state?

Abstract

We conduct a dynamical calculation of pentaquark systems with quark contents $sssu\bar{u}$ in the framework of two quark models: the chiral quark model(ChQM) and quark delocalization color screening model(QDCSM). The effective potentials between baryon and meson clusters are given, and the possible bound states are also investigated. Besides, the study of the scattering process of the open channels is also performed to look for any resonance state. The results show that the $\Omega (2012)$ is not suitable for the interpretation as a ${\Xi }^{\ast }\bar{K}$ molecular state in present quark models. Two resonance states: the ${\Xi }^{\ast }{\bar{K}}^{\ast }$ with $I{J}^P=0{\frac{3}{2}}^{-}$ ($M=2328\sim 2374$ MeV, $\Gamma =57\sim 65.5$ MeV) and $I{J}^P=1{\frac{3}{2}}^{-}$ ($M=2341\sim 2386$ MeV, $\Gamma =31.5\sim 100$ MeV) are obtained in both QDCSM and ChQM, which indicates that both of these two states are more possible to be existed and worthy of being searched by future experiments.

9 pages, 4 figures

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Cited by in corpus (8)

• 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
• 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
• 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