Two-loop supersymmetric corrections to lepton anomalous magnetic and electric dipole moments

Two-loop supersymmetric corrections to lepton anomalous magnetic and electric dipole moments
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轻子反常磁电偶极矩的双环超对称校正

DOI:
10.1103/physrevd.73.116001
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发表时间:
2006-04
期刊:
影响因子:
5
通讯作者:
Song, He-Shan
Song, He-Shan
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Li, Xue-Qian;Maalampi, Jukka;Feng, Tai-Fu;Lin, Lin;Song, He-Shan

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利用有效拉格朗日方法,从标准模型最小超对称扩展(MSSM)中由中微子-睡眠子(带电中微子-sneutrino)组成的特殊双环拓扑图中,分析了对轻子反常偶极矩的电弱修正。考虑内环动量的平移不变性和电磁规范不变性,得到了全维六算符,并推导了它们的系数。将运动方程应用于外部轻子后,得到了轻子的反常偶极矩。数值结果表明,存在一个参数空间,在该参数空间中,对介子异常偶极矩的双环超对称修正可能是显著的。
Using the effective Lagrangian method, we analyze the electroweak corrections to the anomalous dipole moments of leptons from some special two-loop topological diagrams which are composed of neutralino-slepton (chargino-sneutrino) in the minimal supersymmetric extension of the standard model (MSSM). Considering the translational invariance of the inner loop momenta and the electromagnetic gauge invariance, we get all dimension six operators and derive their coefficients. After applying equations of motion to the external leptons, the anomalous dipole moments of leptons are obtained. The numerical results imply that there is a parameter space where the two-loop supersymmetric corrections to the muon anomalous dipole moments may be significant.
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