Regular Article - Theoretical Physics
Strong decays of the Y(4660) as a vector tetraquark state in solid quark-hadron duality
Department of Physics, North China Electric Power University, Baoding, 071003, People’s Republic of China
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Accepted: 19 February 2019
Published online: 1 March 2019
In this article, we choose the type tetraquark current to study the hadronic coupling constants in the strong decays , , , , , , , , with the QCD sum rules based on solid quark-hadron quality. The predicted width is in excellent agreement with the experimental data from the Belle collaboration, which supports assigning the Y(4660) to be the type tetraquark state with . In calculations, we observe that the hadronic coupling constants , which is consistent with the observation of the Y(4660) in the mass spectrum, and favors the molecule assignment. It is important to search for the process to diagnose the nature of the Y(4660), as the decay is greatly suppressed.
© The Author(s), 2019