Abstract
In this article, we perform a systematic study of the mass spectrum of the axial-vector hidden charmed and hidden bottom tetraquark states using the QCD sum rules, and identify the Z +(4430) as an axial-vector tetraquark state tentatively.
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Wang, ZG. Mass spectrum of the axial-vector hidden charmed and hidden bottom tetraquark states. Eur. Phys. J. C 70, 139–154 (2010). https://doi.org/10.1140/epjc/s10052-010-1447-7
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DOI: https://doi.org/10.1140/epjc/s10052-010-1447-7