Correlations between nuclear Schiff moment and electromagnetic measurements
Correlations between nuclear Schiff moment and electromagnetic measurements
复制标题
核席夫矩与电磁测量之间的相关性
DOI：
10.1016/j.physletb.2023.137897
复制
发表时间：
2023
影响因子：
4.4
通讯作者：
N. Yoshinaga
中科院分区：
文献类型：
--
作者：
K. Yanase;N. Shimizu;K. Higashiyama;N. Yoshinaga
本文用大尺度壳模型计算方法研究了核子电偶极矩引起的氘和汞的核Schiff矩。此外，我们还发现了首阶贡献与磁矩之间的线性关系，这将有助于减少理论的不确定性。传统的模型空间不包含由大矩阵元连接到自旋轨道伙伴的和轨道。因此，为了评估传统模型空间之外的相关单粒子轨道的影响，我们应用准粒子真空壳模型方法。此外，次领先级的贡献来自核内的宇称和时间反演破坏。我们证明，这些二次效应不会引起任何显着的干扰的相关性。此外，我们报告的壳模型的结果，核希夫矩系数的Hg。与以前的研究相比，本研究得到的结果是相当大的，表明更高的灵敏度的中子电偶极矩。
We study the nuclear Schiff moments ofXe andHg induced by the nucleon electric dipole moment using large-scale shell model calculations. ForXe, we find a linear relation between the leading-order contribution and magnetic moment, which would be useful in reducing the theoretical uncertainty. The conventional model space does not contain theandorbitals, which are connected to the spin-orbit partners by large matrix elements. Thus, to evaluate the influence of the relevant single-particle orbitals outside the conventional model space, we apply the quasiparticle vacua shell model method. Moreover, the next-to-leading-order contribution arises from parity and time-reversal violation inside the nucleus. We demonstrate that these secondary effects do not induce any significant disturbance to the correlation. Additionally, we report the shell model results for the nuclear Schiff moment coefficients ofHg. Compared to previous studies, the results obtained in this study are rather large, indicating a higher sensitivity to the neutron electric dipole moment.