Rescattering via open-charm channels in a tree-level effective Lagrangian model improves fits to near-threshold J/ψ photoproduction data and produces cusp structures at the relevant thresholds.
Aaijet al.(LHCb Collaboration), Observation of a narrow pentaquark state,P c(4312)+, and of two-peak structure of theP c(4450)+, Phys
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Rescattering effects in near-threshold $J/\psi$ photoproduction
Rescattering via open-charm channels in a tree-level effective Lagrangian model improves fits to near-threshold J/ψ photoproduction data and produces cusp structures at the relevant thresholds.