Looking for a hidden-charm pentaquark state with strangeness S=-1 from Ξb- decay into J/ψK- Λ

Assuming that the recently observed hidden-charm pentaquark state, Pc(4450), is of molecular nature as predicted in the unitary approach, we propose to study the decay of Ξb-→J/ψK-Λ to search for the strangeness counterpart of the Pc(4450). There are three ingredients in the decay mechanism: the weak decay mechanism, the hadronization mechanism, and the final state interactions in the meson-baryon system of strangeness S=-2 and isospin I=1/2 and of the J/ψΛ. All these have been tested extensively. As a result, we provide a genuine prediction of the invariant mass distributions where a strangeness hidden-charm pentaquark state, the counterpart of the Pc(4450), can be clearly seen. The decay rate is estimated to be of similar magnitude as the Λb0→J/ψK-p measured by the LHCb Collaboration.