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In this article, we construct the diquark–diquark–antiquark type interpolating currents, and we study the masses and pole residues of the JP=3/2⁻ and 5/2⁺ hidden charm pentaquark states in detail with the QCD sum rules by calculating the contributions of the vacuum condensates up to dimension-10 in the operator product expansion. In the calculations, we use the formula μ =√M²Pc-(2Mc)² to determine the energy scales of the QCD spectral densities. The present predictions favor assigning Pc(4380) and Pc(4450) to be the 3/2⁻ and 5/2⁺ pentaquark states, respectively.
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Zhi-Gang Wang (2016) studied this question.
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