New results on the hadronic vacuum polarization contribution to the muon g－2

Michel Davier

doi:10.1088/1674-1137/34/6/018

Chinese Physics C> 2010, Vol. 34> Issue(6) : 718-727 DOI: 10.1088/1674-1137/34/6/018

New results on the hadronic vacuum polarization contribution to the muon g－2

Michel Davier ^,

Laboratoire de l'Accélérateur Linéaire, IN2P3/CNRS, Université Paris-Sud 11, Orsay 91898, France

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Abstract：
Results on the lowest-order hadronic vacuum polarization contribution to the muon magnetic anomaly are presented. They are based on the latest published experimental data used as input to the dispersion integral. Thus recent results on τ→ν_τππ⁰ decays from Belle and on e⁺e^－ annihilation to π⁺π^－ from BABAR and KLOE are included. The new data, together with improved isospin-breaking corrections for τ decays, result into a much better consistency among the different results. A discrepancy between the Standard Model prediction and the direct g－2 measurement is found at the level of 3σ.

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Michel Davier. New results on the hadronic vacuum polarization contribution to the muon g－2[J]. Chinese Physics C, 2010, 34(6): 718-727. doi: 10.1088/1674-1137/34/6/018

Michel Davier. New results on the hadronic vacuum polarization contribution to the muon g－2[J]. Chinese Physics C, 2010, 34(6): 718-727. doi: 10.1088/1674-1137/34/6/018 shu

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Received: 2010-02-05
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

New results on the hadronic vacuum polarization contribution to the muon g－2

Michel Davier ^,

Corresponding author: Michel Davier,

Laboratoire de l'Accélérateur Linéaire, IN2P3/CNRS, Université Paris-Sud 11, Orsay 91898, France

Received Date: 2010-02-05
Accepted Date: 1900-01-01
Available Online: 2010-06-05

Abstract:

Results on the lowest-order hadronic vacuum polarization contribution to the muon magnetic anomaly are presented. They are based on the latest published experimental data used as input to the dispersion integral. Thus recent results on τ→ν_τππ⁰ decays from Belle and on e⁺e^－ annihilation to π⁺π^－ from BABAR and KLOE are included. The new data, together with improved isospin-breaking corrections for τ decays, result into a much better consistency among the different results. A discrepancy between the Standard Model prediction and the direct g－2 measurement is found at the level of 3σ.