Abstract
We study flavour symmetry breaking in the mixed quark gluon condensate by applying the standard QCD sum rules technique to a set of particular choosen “hybrid correlators”. We include condensates up to dimension six and discuss perturbative contributions semi-quantitatively. We obtain consistent and stable sum rules which allow the ratio R≔ 〈 sσGs〉 / 〈 uσGu〉 reliably. The numerical value we obtain is 0.75⩽ R⩽0. 85.
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