# Muon g-2 : a mini review

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.
Document type :
Conference papers

Cited literature [24 references]

http://hal.in2p3.fr/in2p3-00163021
Contributor : Sabine Starita <>
Submitted on : Monday, July 16, 2007 - 3:56:40 PM
Last modification on : Wednesday, September 16, 2020 - 4:22:21 PM
Long-term archiving on: : Thursday, April 8, 2010 - 11:20:21 PM

### File

zhang_m07.pdf
Files produced by the author(s)

### Identifiers

• HAL Id : in2p3-00163021, version 1

### Citation

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⟩

Record views