Extracting ms From Flavor Breaking in Hadronic Tau Decays
Abstract
New finite energy sum rules (FESR's) for extracting ms from hadronic tau decay data are constructed which (1) significantly reduce potential theoretical uncertainties present in existing sum rule analyses and (2) remove problems associated with both the poor convergence of the OPE representation of the longitudinal part of the us vector and axial vector correlators and the large statistical errors in the us spectral data above the K* region.
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