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Paper   IPM / Particles And Accelerator / 16417
School of Particles and Accelerator
  Title:   Determination of the possible quantum numbers for the newly observed Ξb(6227)0 state
  Author(s): 
1.  Kazem Azizi
2.  Y Sarac
3.  H Sundu
  Status:   Published
  Journal: JHEP
  No.:  244
  Vol.:  03
  Year:  2021
  Supported by:  IPM
  Abstract:
The LHCb Collaboration recently reported the observation of a new excited bottom baryon Ξb(6227)0 and announced an improvement in the measurements related to the previously observed Ξb(6227) state. We conduct an analysis for Ξb(6227)0 state considering it as isospin partner of the Ξb(6227) resonance and possibly 1P or 2S excited state with spin J=[3/2]. The corresponding masses for both possibilities have consistent results with the experimental data, indicating that only with the mass sum rules, one can not make exact decision on the nature and quantum numbers of this state. To go further, the decays of these possible excited states to Ξb π+ final state are also considered and the relevant strong coupling constants are extracted from the light cone sum rules. The obtained decay width values support the possibility of Ξb(6227)0 to be the 1P excited state of Ξb(5945)0 baryon.


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