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Small-Size Instanton Corrections to the $\tau$ Hadronic Width
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classification
hep-ph
keywords
hadroniccorrectionsinstantonsmall-sizewidthapplyassessaxial
abstract
We compute the effect of small-size instanton corrections to current-current correlators, for all combinations of axial, vector, and possibly flavour non-diagonal currents. We apply our result to the hadronic decays of the $\tau$ lepton, in order to assess the reliability of the determination of $\as$ from the $\tau$ hadronic width.
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