A coupled-channel model mixing χ_cJ(2P) cores with D(*)D(*) hadrons describes X(3872) as mostly molecular while X(3860) and Z(3930) have larger compact components and predicts a 0++ state.
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Hadronic Molecules and $\chi_{cJ}(2P)$ Coupled States
A coupled-channel model mixing χ_cJ(2P) cores with D(*)D(*) hadrons describes X(3872) as mostly molecular while X(3860) and Z(3930) have larger compact components and predicts a 0++ state.