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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

hep-pharXiv:hep-ph/0503297

Abstract

In this article, we take the point of view that the 0++ nonet mesons below 1 GeV are diquark-antidiquark states (qq)3(qq)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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