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Conference Papers Year : 2014

Status of Leading-Order Hadronic Vacuum Polarization Dispersion Calculation

Z. Zhang
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  • PersonId : 830596

Abstract

The leading-order hadronic contribution to the muon magnetic anomaly aμ≡(gμ−2)/2aμ≡(gμ−2)/2, calculated using a dispersion integral of e+e−e+e− annihilation data and τ decay data, is briefly reviewed. This contribution has the largest uncertainty to the predicted value of aμaμ, which differs from the experimental value by ∼ 3.6 (2.4) standard deviations for the e+e−e+e− (τ) based analysis. New results since the last workshop and main open issues on the subject are discussed.

Dates and versions

in2p3-00764326 , version 1 (12-02-2013)

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Z. Zhang. Status of Leading-Order Hadronic Vacuum Polarization Dispersion Calculation. 12th International Workshop on Tau Lepton Physics (TAU2012), Sep 2012, Nagoya, Japan. pp.131-134, ⟨10.1016/j.nuclphysbps.2014.09.032⟩. ⟨in2p3-00764326⟩
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