ec 2 00 5 On the Leading Order Hadronic Contribution to ( g − 2 ) μ


Sum rule constraints dominated by the independent high-scale input, αs(MZ), are shown to be satisfied by I = 1 spectral data from hadronic τ decays, but violated by the pre-2005 electroproduction (EM) cross-section data. Determinations of the Standard Model (SM) hadronic contribution to (g−2)μ incorporating τ decay data are thus favored over those based… (More)

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