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Conference Papers Year : 2007

Muon g-2 : a mini review

Z. Zhang
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Abstract

The current status of the experimental measurements and theoretical predictions of the anomalous magnetic moment of the muon $a\mu$ is briefly reviewed. The emphasis is put on the evaluation of the hadronic contribution to $a\mu$ as it has the largest uncertainty among all Standard Model contributions. The precision of the hadronic contribution is driven by the input $e^+e- $ data predominantly from the $\pi^+\pi^-$ channel. Including the latest experimental data on $e^+e^-$ annihilation into hadrons from CMD2 and SND for the $\pi^+\pi^-$ channel and BaBar for multi-hadron final states, the updated Standard Model prediction disagrees with the measurement dominated by BNL by 3.3 standard deviations, with the theoretical precision exceeding the experimental one.
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Dates and versions

in2p3-00163021 , version 1 (16-07-2007)

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  • HAL Id : in2p3-00163021 , version 1

Cite

Z. Zhang. Muon g-2 : a mini review. 42nd Rencontres de Moriond Electroweak Interactions and Unified Theories Session, Mar 2007, La Thuile, Italy. pp.457-466. ⟨in2p3-00163021⟩
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