论文标题
重新审视的电动磁力矩的电动Fermion Triangle循环贡献
Electroweak fermion triangle loop contributions to the muon anomalous magnetic moment revisited
论文作者
论文摘要
通过光子连接到MUON线的Fermion Triangle Loop图对MUON异常的磁矩的贡献，并在单位仪表中重新分析了$ z $ boson。通过使用异常的轴向矢量病房的身份，显示出统一规格中的计算与't Hooft-feynman仪表中的计算完全一致。由普通的轴向载体病房的身份产生的部分对应于中性金石玻色子的贡献。对于顶级贡献，单参数积分形式的获得为$m_μ^2/m_z^2 $。将结果与通过渐近扩张方法获得的结果进行了比较。
The contribution to the muon anomalous magnetic moment from the fermion triangle loop diagrams connected to the muon line by a photon and a $Z$ boson is reanalyzed in the unitary gauge. With use of the anomalous axial-vector Ward identity, it is shown that the calculation in the unitary gauge exactly coincides with the one in the 't Hooft-Feynman gauge. The part which arises from the ordinary axial-vector Ward identity corresponds to the contribution of the neutral Goldstone boson. For the top-quark contribution, the one-parameter integral form is obtained up to the order of $m_μ^2/m_Z^2$. The results are compared with those obtained by the asymptotic expansion method.
