Tenth-Order QED Contribution to the Electron g-2 and an Improved Value of the Fine Structure Constant
Tenth-Order QED Contribution to the Electron g-2 and an Improved Value of the Fine Structure Constant
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DOI：
10.1103/physrevlett.109.111807
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发表时间：
2012-09-13
影响因子：
8.6
通讯作者：
Nio, Makiko
中科院分区：
文献类型：
--
作者：
Aoyama, Tatsumi;Hayakawa, Masashi;Nio, Makiko
这封信介绍了电子g - 2的完整QED贡献，直到第十阶。在自动代码生成器的帮助下，我们评估了所有12 672个十阶图，并获得9.16（58）（alpha/pi）（5）。我们还改进了八阶贡献，得到-1.9097（20）（alpha/pi）（4），其中包括质量相关的贡献。这些结果导致a（e）（理论）= 1159652181.78（77）X（10）（-12）。根据a（e）的理论和测量，得到了精细结构常数α（-1）= 137.035 999 173（35）[0.25 ppb]的改进值。
This Letter presents the complete QED contribution to the electron g - 2 up to the tenth order. With the help of the automatic code generator, we evaluate all 12 672 diagrams of the tenth-order diagrams and obtain 9.16 (58)(alpha/pi)(5). We also improve the eighth-order contribution obtaining -1.9097 (20)(alpha/pi)(4), which includes the mass-dependent contributions. These results lead to a(e)(theory) = 1 159 652 181.78(77) X (10)(-12). The improved value of the fine-structure constant alpha(-1) = 137.035 999 173 (35) [0.25 ppb] is also derived from the theory and measurement of a(e).