Standard Model Prediction for Paramagnetic Electric Dipole Moments.
Standard Model Prediction for Paramagnetic Electric Dipole Moments.
复制标题
顺磁电偶极矩的标准模型预测。
DOI：
--
复制
发表时间：
2022
影响因子：
8.6
通讯作者：
M. Pospelov
中科院分区：
文献类型：
--
作者：
Yohei Ema;T. Gao;M. Pospelov
与Cabibbo-Kobayashi-Maskawa夸克混合矩阵的相位相关的标准模型CP破坏已知对电偶极矩（EDM）观测值给出小的答案。此外，中子和反磁性原子的EDM的预测遭受相当大的不确定性。我们指出，与电子自旋相关的CP破坏观测量（顺磁EDMs）主要由电弱企鹅图和重子扇区中ΔI=1/2弱跃迁的组合决定，并且可以用手征微扰理论计算.半轻子算符CS的预测大小为7×10^{-16}，相当于等效电子EDM d_{e}^{eq}=1.0×10^{-35} e cm.虽然距离目前的观测极限还很远，但这一结果比以前认为的要大3个数量级。
Standard model CP violation associated with the phase of the Cabibbo-Kobayashi-Maskawa quark mixing matrix is known to give small answers for the electric dipole moment (EDM) observables. Moreover, predictions for the EDMs of neutrons and diamagnetic atoms suffer from considerable uncertainties. We point out that the CP-violating observables associated with the electron spin (paramagnetic EDMs) are dominated by the combination of the electroweak penguin diagrams and ΔI=1/2 weak transitions in the baryon sector, and are calculable within chiral perturbation theory. The predicted size of the semileptonic operator C_{S} is 7×10^{-16}, which corresponds to the equivalent electron EDM d_{e}^{eq}=1.0×10^{-35} e cm. While still far from the current observational limits, this result is 3 orders of magnitude larger than previously believed.
影响因子：
64.8
作者：
Andreev, V.;Ang, D. G.;Wu, X.
通讯作者：
Wu, X.