Abstract
Very recently, a new $\Omega^{*}$ 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 $K\Xi^*$ threshold and hence hints to be a possible $K\Xi^*$ 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 $\Omega^*$ 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 $\Omega^*$ may be ascribed as the $J^P={3/2}^-$ $K\Xi^*$ hadronic molecular state and can be further checked through its $K\pi\Xi$ decay channel.
Highlights
Various models, such as classical quenched quark models with three constituent quarks [1,2], unquenched quark models [3,4], and hadronic dynamical models [5,6,7], gave very different predictions for the ΩÃ spectrum around 2000 MeV
A new ΩÃ state was reported by the Belle Collaboration, with its mass of 2012.4 Æ 0.7ðstatÞ Æ 0.6ðsystÞ MeV, which locates just below the KΞÃ threshold and hints to be a possible KΞÃ 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 ΩÃ state within the hadronic molecular picture
Summary
A new ΩÃ state was reported by the Belle Collaboration, with its mass of 2012.4 Æ 0.7ðstatÞ Æ 0.6ðsystÞ MeV, which locates just below the KΞÃ threshold and hints to be a possible KΞÃ 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 ΩÃ 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 KπΞ three-body decay. This suggests that the newly observed ΩÃ may be ascribed as the JP 1⁄4 3=2− KΞÃ hadronic molecular state and can be further checked through its KπΞ decay channel
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