Analysis of the scalar nonet mesons with the QCD sum rules
Abstract
In this article, we assume that the nonet scalar mesons below 1\, GeV are the two-quark-tetraquark mixed states and study their masses and pole residues using the QCD sum rules. In calculation, we take into account the vacuum condensates up to dimension 10 and the O(αs) corrections to the perturbative terms in the operator product expansion. We determine the mixing angles, which indicate the two-quark components are much larger than 50\%, then obtain the masses and pole residues of the nonet scalar mesons.
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