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| Paper IPM / P / 15267 |
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| Abstract: | |||||||
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The spectroscopic parameters and partial widths of the strong decay channels of the vector meson Y(4660) are calculated by treating it as a bound state of a diquark and
antidiquark. The mass and coupling of the JPC=1- tetraquark Y(4660) are evaluated in the context of the two-point sum rules method by
taking into account the quark, gluon and mixed condensates up to dimension ten.
The widths of the Y(4660) resonance's strong S-wave decays to J/ψf0(980) and ψ(2S) f0(980), as well as to J/ψf0(500) and
ψ(2S) f0(500) final states are computed. To this end, strong
couplings in the relevant vertices are extracted from QCD sum rules on the
light-cone supplemented by the technical methods of the soft approximation.
The obtained result for the mass of the resonance mY=4677+71−63MeV, and prediction for its total width ΓY = (64.8 ±10.8) MeV are in nice agreements with the experimental
information.
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