Two-body strong decays of the hidden-charm tetraquark molecular states via the QCD sum rules

Abstract

In this work, we extend our previous work on the $D^{\ast }{\bar{D}}^{\ast }$ molecular states with the $J^{PC}=0^{++}$, $1^{+-}$ and $2^{++}$ to investigate their two-body strong decays via the QCD sum rules based on rigorous quark-hadron duality. We obtain the partial decay widths therefore total widths of the ground states with the $J^{PC}=0^{++}$, $1^{+-}$ and $2^{++}$, which indicate that it is reasonable to assign the $X_2(4014)$ as the $D^{\ast }{\bar{D}}^{\ast }$ tetraquark molecular states with the $J^{PC}=2^{++}$.

16 pages, 1 figure

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• Pion Interactions in the X(3872)
• Is the X(3872) Production Cross Section at Tevatron Compatible with a Hadron Molecule Interpretation?
• The Heavy Quark Spin Symmetry Partners of the X(3872)
• The Vector and Axial-Vector Charmonium-like States
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• Analysis of the hidden-charm tetraquark molecule mass spectrum with the QCD sum rules
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• A Phenomenological analysis on isospin-violating decay of $X(3872)$
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• Analysis of the $X(3960)$ and related tetraquark molecular states via the QCD sum rules
• Strong decays of the $Y(4660)$ as a vector tetraquark state in solid quark-hadron duality
• Revisit the isospin violating decays of $X(3872)$
• Analysis of the hidden-bottom tetraquark mass spectrum with the QCD sum rules
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• Fully-heavy hexaquark states via the QCD sum rules
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• The two-body strong decays of the fully-charm tetraquark states
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