DΣ*c and D*Σc interactions and the LHCb hidden-charmed pentaquarks

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Very recently, two hidden-charmed resonances Pc(4380) and Pc(4450) consistent with pentaquark states were observed at the LHCb detector. The two Pc states locate just below the DΣ*c and D*Σc thresholds with mass of gaps about 5 and 15 MeV, respectively. Inspired by this fact we perform a dynamical investigation about the DΣc*(2520) and D*Σc(2455) interactions which are described by the meson exchanges. A bound state which carries spin-parity Jᵖ=3/2- is produced from the DΣ*c(2520) interaction, which is consistent with the Pc(4380) observed at the LHCb detector. From the D*Σc(2455) interaction, a bound state with 5/2+ is produced, which can be related to the Pc(4450). The results suggest that the Pc(4380) and Pc(4450) are good candidates of DΣc*(2520) and D*Σc(2455) molecular states, respectively.