Abstract
In this article, we assign Y(4274) to the color octet–octet type axialvector molecule-like state with J^{PC}=1^{++} tentatively, and construct the color octet–octet type axialvector current to study its mass and width with the QCD sum rules in details. The predicted mass favors assigning the Y(4274) to a color octet–octet type molecule-like state, but the predicted width strongly disfavors assigning the Y(4274) to the color octet–octet type molecule-like state. The Y(4274) may be the conventional charmonium state chi _{c1}(mathrm 3P), and it is important to observe the decay Y(4274)rightarrow J/psi omega to diagnose the nature of Y(4274).
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