Abstract
A systematic analysis of JPC = 1++ charmoniumlike mesons with energies up to 4.0 GeV is carried out within the diabatic approach to QCD. The resulting spectrum contains only two bound states: the conventional 1p charmonium state and a D0 D̄∗0 loosely bound state which may be naturally identified with X(3872). The rest of the spectrum consists in a continuum of D0 D̄∗0 and D+D∗− scattering states, whose analysis indicates the presence of a resonance near 3.96 GeV that may be assigned to a mostly conventional 2p charmonium state. It is shown that this χc1(2p) resonance is likely overshadowed in its expected main decay channels, D0 D̄∗0 and D+D∗−, by the threshold enhancements due to the loosely bound X(3872), which may justify its lack of detection to date. Alternative discovery channels are discussed.
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