Hadronic molecular assignment for the newly observed Ω∗ state

Abstract

Very recently, a new Ω∗ state was reported by the Belle Collaboration, with its mass of 2012.4±0.7(stat)±0.6(syst) MeV, which locates just below the KΞ∗ threshold and hence hints to be a possible KΞ∗ 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 Ω∗ 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 Ω∗ may be ascribed as the JP=3/2- KΞ∗ hadronic molecular state and can be further checked through its KπΞ decay channel.