QCD sum rules with color-octet two-cluster currents predict hidden-charm pentaquark masses of roughly 4.4-6.2 GeV for various spins, parities, and flavor contents.
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Hidden charm pentaquarks with color-octet substructure in QCD Sum Rules
QCD sum rules with color-octet two-cluster currents predict hidden-charm pentaquark masses of roughly 4.4-6.2 GeV for various spins, parities, and flavor contents.