Vector and axial-vector current correlators within the instanton model of QCD vacuum
Abstract
The pion electric polarizability, αEπ, the leading order hadronic contribution to the muon anomalous magnetic moment, aμhvp 1 , and the ratio of the difference to the sum of vector and axial-vector correlators, (V-A)/(V+A), are found within the instanton model of QCD vacuum. The results are compared with phenomenological estimates of these quantities following from the ALEPH and OPAL data on vector and axial-vector spectral densities.
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