Since the observation of the two exotic hidden-charm pentaquark P+c states of the quark content uudc￣c with the spins 3/2 and 5/2 through the decayΛ0 b→J/ψK−p by LHCb collaboration[1],there have been many studies on those states and other expected hidden-charm pentaquark states within quark models,diquark models,the hadronic molecular states,and the hadroquarkonia model.
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