Status of Leading-Order Hadronic Vacuum Polarization Dispersion Calculation
Abstract
The leading-order hadronic contribution to the muon magnetic anomaly aμ = (gμ - 2)/2, calculated using a dispersion integral of e+e- annihilation data and tau decay data, is briefly reviewed. This contribution has the largest uncertainty to the predicted value of aμ, which differs from the experimental value by ~3.6 (2.4) standard deviations for the e+e- (tau) based analysis. New results since the last workshop and main open issues on the subject are discussed.
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