Non-perturbative QCD vacuum frome
+e−→I=1 hadron data |
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| Authors: | G Launer S Narison R Tarrach |
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| Institution: | 1. Centre de Physique Théorique, CNRS, U.E.R. de Luminy, Case 907, F-13288, Marseille Cedex 2, France
2. CERN, CH-1211, Geneva 23, Switzerland
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| Abstract: | We estimate the gluon vacuum condensate α s 〈F 2〉 from thee +e?→I=1 hadron cross-section known below 2 GeV using moment sum rules ratios. We obtain α s 〈F 2〉= (3.9±1.0)10?2GeV4. We also re-evaluate the contribution of the dimension-six vacuum condensates to the above sum rule and test the factorization hypothesis of the four-quark operator. Useful rules for the evaluation of the dimension-six vacuum condensates contributions are given. |
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