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arXiv 1407.0264hep-ph
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高阶强子和重轻子对反常磁矩的贡献

Higher-order hadronic and heavy-lepton contributions to the anomalous magnetic moment

Alexander Kurz, Tao Liu, Peter Marquard, Matthias Steinhauser

摘要:

我们报道了最近关于μ子反常磁矩的研究结果。计算了三圈核函数,得到了次-次-首阶强子真空极化贡献。数值结果,$a_μ^{\rm{had,NNLO}}=1.24\pm 0.01 \times 10^{-10}$,是相同的数量级,目前的不确定性从强子的贡献。对于重轻子修正,得到了四圈级的解析结果,并与已知结果进行了比较。

英文摘要:

We report about recent results obtained for the muon anomalous magnetic moment. Three-loop kernel functions have been computed to obtain the next-to-next-to-leading-order hadronic vacuum polarization contributions. The numerical result, $a_μ^{\rm{had,NNLO}}=1.24\pm 0.01 \times 10^{-10}$, is of the same order of magnitude as the current uncertainty from the hadronic contributions. For heavy-lepton corrections, analytical results are obtained at four-loop order and compared with the known results.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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