Regular Article - Theoretical Physics
Lowest vector tetraquark states: Y(4260 / 4220) or
Department of Physics, North China Electric Power University, Baoding, 071003, People’s Republic of China
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Accepted: 2 November 2018
Published online: 14 November 2018
In this article, we take the Y(4260 / 4220) as the vector tetraquark state with , and construct the type diquark-antidiquark current to study its mass and pole residue with the QCD sum rules in details by taking into account the vacuum condensates up to dimension 10 in a consistent way. The predicted mass is in excellent agreement with experimental data and supports assigning the Y(4260 / 4220) to be the type vector tetraquark state, and disfavors assigning the to be the type vector tetraquark state. It is the first time that the QCD sum rules have reproduced the mass of the Y(4260 / 4220) as a vector tetraquark state.
© The Author(s), 2018