Anomalous magnetic moment of the muon in a dispersive approach
Anomalous magnetic moment of the muon in a dispersive approach
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色散方法中 μ 子的反常磁矩
DOI：
10.1103/physrevd.90.113012
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发表时间：
2014
影响因子：
5
通讯作者：
M. Vanderhaeghen
中科院分区：
文献类型：
--
作者：
V. Pauk;M. Vanderhaeghen
我们提出了一个新的一般色散形式评估强子光的光散射的μ子的反常磁矩的贡献。在建议的方法中，这种修正与μ子的电磁顶点函数的虚部有关。后者可能通过么正性和解析性与可测强子过程直接相关。作为一个测试，我们采用介绍的形式主义的介子极交换的情况下，发现协议与直接双回路计算。
We present a new general dispersive formalism for evaluating the hadronic light-by-light scattering contribution to the anomalous magnetic moment of the muon. In the suggested approach, this correction is related to the imaginary part of the muon’s electromagnetic vertex function. The latter may be directly related to measurable hadronic processes by means of unitarity and analyticity. As a test we apply the introduced formalism to the case of meson pole exchanges and find agreement with the direct two-loop calculation.