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Analysis the $0^{++}$ nonet mesons as four-quark states with the QCD sum rules

Zhi-Gang Wang·Wei-Min Yang·Shao-Long Wan
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Abstract

In this article, we take the point of view that the $0^{++}$ nonet mesons below $1 GeV$ are diquark-antidiquark states $(qq)_{\bar{3}}(\bar{q}\bar{q})_3$, and devote to determine their masses in the framework of the QCD sum rules approach with the interpolating currents constructed from scalar-scalar type and pseudoscalar-pseudoscalar type diquark pairs respectively. The numerical results indicate that the $0^{++}$ nonet mesons may have two possible diquark-antidiquark substructures.

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Zhi-Gang Wang, Wei-Min Yang, Shao-Long Wan. 2005-05-30. Analysis the $0^{++}$ nonet mesons as four-quark states with the QCD sum rules. https://doi.org/10.1088/0954-3899%2F31%2F8%2F025

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