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.
The observation of light nuclei at ALICE and the X(3872) conundrum
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abstract
The new data reported by ALICE on the production of light nuclei with pT < 10 GeV in Pb-Pb collisions at sqrt(s_NN) = 2.76 TeV are used to compute an order-of-magnitude estimate of the expected production cross sections of light nuclei in proton-proton collisions at high transverse momenta. We compare the hypertriton, helium-3 and deuteron production cross sections to that of X(3872), measured in prompt pp collisions by CMS. The results we find suggest a different production mechanism for the X(3872), making questionable any loosely bound molecule interpretation.
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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.