QCD sum rules yield a total decay width of 61.5 ± 7.3 MeV for the [sc][s-bar c-bar] tetraquark that matches Y(4660) data, supporting that interpretation.
Ablikim et al, Phys
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Analysis of the strong decays of the $Y(4660)$ in tetraquark scenario via the QCD sum rules
QCD sum rules yield a total decay width of 61.5 ± 7.3 MeV for the [sc][s-bar c-bar] tetraquark that matches Y(4660) data, supporting that interpretation.