Interpretation of excited Ωb signals

Marek Karliner, Jonathan L. Rosner

Research output: Contribution to journalArticlepeer-review


Recently LHCb reported the discovery of four extremely narrow excited Ωb baryons decaying into Ξ0bK−. We interpret these baryons as bound states of a b-quark and a P-wave ss-diquark. For such a system there are exactly five possible combinations of spin and orbital angular momentum. We predict two of spin 1/2, two of spin 3/2, and one of spin 5/2, all with negative parity. We favor identifying the observed states as those with spins 1/2 and 3/2, and give a range of predicted masses for the one with spin 5/2. We update earlier predictions for these states based on the five narrow excited Ωc states reported by LHCb. An alternative picture of the states in which one of J=1/2

 is extremely wide and hence not seen by LHCb is discussed.

Original languageEnglish
Article number014027
JournalPhysical Review D
Issue number1
StatePublished - 1 Jul 2020


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