The recent B factories measurements of new states exhibit, in most of the decays, charmonium-like resonances. Among them we study the $J^{PC}=1^{--}$ hidden charm resonances in order to assert if they are $q\overline{q}$ states or more complicated structures. The energy spectrum, electromagnetic, and strong decays are studied in a constituent quark model which has been able to reproduce the hadronic phenomenology and the baryon-baryon interaction. Most of the reported states are nicely interpreted as $q\overline{q}$ pairs. The new $\psi (4360)$ state is found as the $4S$ state and the $\psi (4415)$ as the $3D$ which differs from the standard assignment. Some of the states, such as the $Y(4260)$, cannot be accommodated as $q\overline{q}$ pairs.

• Received 7 October 2008

DOI:https://doi.org/10.1103/PhysRevD.78.114033