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arXiv 0712.2607hep-ph
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电子反常磁矩的八阶QED贡献的修正值

Revised value of the eighth-order QED contribution to the anomalous magnetic moment of the electron

T. Aoyama, M. Hayakawa, T. Kinoshita, M. Nio

摘要:

我们已经进行了一个新的评估的八阶贡献的电子g-2使用FORTRAN代码产生的自动代码生成器gencodeN。“新”结果与“旧”结果的比较揭示了后者在红外发散处理上的不一致。修正了这个误差后,我们现在有两个独立的八阶项的测定。这导致电子g-2的修正值为1 159 652 182.79(7.71)x 10^{-12},其中不确定性主要来自精细结构常数α的最佳非QED值。从修正后的理论和最新的实验中得出的新α值为α ^{-1} = 137.035 999 084(51)[0.37 ppb],比之前的α ^{-1}小了约4.7 ppb。

英文摘要:

We have carried out a new evaluation of the eighth-order contribution to the electron g-2 using FORTRAN codes generated by an automatic code generator gencodeN. Comparison of the "new" result with the "old" one has revealed an inconsistency in the treatment of the infrared divergences in the latter. With this error corrected we now have two independent determinations of the eighth-order term. This leads to the revised value 1 159 652 182.79 (7.71) x 10^{-12} of the electron g-2, where the uncertainty comes mostly from that of the best non-QED value of the fine structure constant alpha. The new value of alpha derived from the revised theory and the latest experiment is alpha^{-1} = 137.035 999 084 (51) [0.37 ppb], which is about 4.7 ppb smaller than the previous alpha^{-1}.

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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