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2014

A note on the newly observed Y(4220) resonance

Faccini, R., Filaci, G., Guerrieri, A. L. et al.

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BES III Collaboration has recently observed a vector resonance in the chi_{c0} omega channel, at a mass of about 4220 MeV, named Y(4220).

Hints of a similar structure appear in the h_c pi+ pi- 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.

A note on the newly observed Y(4220) resonance · Around

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