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

New results on the hadronic vacuum polarization contribution to the muon g − 2
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强子真空极化对 μ 子 g − 2 贡献的新结果

DOI:
10.1088/1674-1137/34/6/018
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发表时间:
2010
期刊:
影响因子:
3.6
通讯作者:
M. Davier
M. Davier
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
M. Davier

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最低阶强子真空极化的μ子磁异常的贡献的结果。它们是基于最新公布的实验数据作为输入的色散积分。因此,最近的结果τ → ντππ0衰变从贝儿和e+e −湮灭到π+π−从BABAR和KLOE。新的数据,加上改进的同位旋破缺修正τ衰变,导致更好的一致性之间的不同结果。标准模型的预测和g − 2的直接测量在3σ的水平上存在差异。
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 → ντππ0 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.
DOI: --
发表时间: 2006
期刊:
影响因子: --
作者:
S. Ito;他8名;Y. Miyazaki
通讯作者: Y. Miyazaki