Hadronic molecular assignment for the newly observed Ω state

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 ot...

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Veröffentlicht in:Physical review. D 2018-09, Vol.98 (5), Article 056013
Hauptverfasser: Lin, Yong-Hui, Zou, Bing-Song
Format: Artikel
Sprache:eng
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Zusammenfassung: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.
ISSN:2470-0010
2470-0029
DOI:10.1103/PhysRevD.98.056013