Abstract
The BES III Collaboration has recently observed a vector resonance in the ${\ensuremath{\chi}}_{c0}\ensuremath{\omega}$ channel, at a mass of about 4220 MeV, named $Y(4220)$. Hints of a similar structure appear in the ${h}_{c}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ channel. We find that the two observations are likely due to the same state, which we identify with one of the expected diquark-antidiquark resonances with orbital quantum number $L=1$. This assignment fulfills heavy quark spin conservation. The measured branching ratio of the $Y(4220)$ into ${\ensuremath{\chi}}_{c0}\ensuremath{\omega}$ and ${h}_{c}{\ensuremath{\pi}}^{+}{\ensuremath{\pi}}^{\ensuremath{-}}$ is compatible with the prediction for such a tetraquark state.
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