Two-loop supersymmetric corrections to lepton anomalous dipole moments in split supersymmetry scenarios

Two-loop supersymmetric corrections to lepton anomalous dipole moments in split supersymmetry scenarios
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分裂超对称场景中轻子反常偶极矩的双环超对称校正

DOI:
10.1103/physrevd.77.116008
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发表时间:
2008-05
期刊:
影响因子:
5
通讯作者:
Feng, Tai-Fu
Feng, Tai-Fu
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Yang, Xiu-Yi;Sun, Lin;Feng, Tai-Fu

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在分裂超对称性情形下,分析了在标准模型的单圈图中插入一个封闭的中性伴子/荷子圈的特殊双圈图对轻子反常偶极矩的电弱修正.考虑到内环动量的平移不变性和电磁规范不变性,我们得到了所有的六维算符及其系数。将运动方程应用于外轻子,得到了轻子的反常偶极矩。数值结果表明,有参数空间的贡献μ子异常MDM从这个部门可能是显着的,和贡献的电子电偶极矩从这个部门是相当大的,足以在下一代实验中观察到。
An analysis of electroweak corrections to the anomalous dipole moments of lepton from some special two-loop diagrams where a closed neutralino/chargino loop is inserted into relevant one-loop diagrams of the standard model is presented in the split supersymmetry scenarios. Considering the translational invariance of the inner loop momenta and the electromagnetic gauge invariance, we get all dimension-6 operators and their coefficients. After applying equations of motion to the external leptons, we obtain the anomalous dipole moments of lepton. The numerical results imply that there is parameter space where the contribution to the muon anomalous MDM from this sector is perhaps significant, and the contribution to the electron electric dipole moment from this sector is sizable enough to be observed in next-generation experiments.
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