Status of Leading-Order Hadronic Vacuum Polarization Dispersion Calculation
arXiv:1302.1896 · doi:10.1016/j.nuclphysbps.2014.09.032
Abstract
The leading-order hadronic contribution to the muon magnetic anomaly a_μ = (g_μ - 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 a_μ, 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.
Tau2012 workshop proceedings, 5 pages, 4 figures