Enhancement factors of parity- and time-reversal-violating effects for monofluorides
Enhancement factors of parity- and time-reversal-violating effects for monofluorides
复制标题
一氟化物宇称和时间反转破坏效应的增强因子
DOI：
10.1103/physreva.98.042511
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发表时间：
2018
影响因子：
2.9
通讯作者：
Das B. P.
中科院分区：
文献类型：
--
作者：
Sunaga A.;Prasannaa V. S.;Abe M.;Hada M.;Das B. P.
重极性双原子分子目前是通过研究时间反转（）和宇称（）违反来探索超越标准模型的物理的主要候选者之一。本文分析了群-12和群-2体系中确定电子电偶极矩（eEDM）和标量-伪标量（S-PS）相互作用系数（）所需的有效电场（）。我们使用相对论耦合簇方法进行计算，发现12族的单氟化物具有较大的和（例如，最重的12族氟化物CnF的和值分别为662 GV/cm和3360 kHz）。其原因是由于最外层核的电子的弱屏蔽作用导致价电子和轨道的收缩。的计算表明，它们的比值随。基于这些结果，以及实验的适用性，我们提出SrF和CdF作为实验的候选分子。
Heavy polar diatomic molecules are currently one of the leading candidates for probing physics beyond the standard model via studies of time-reversal () and parity () violations. In this paper, we analyze the effective electric field () that is required for determining the electron electric dipole moment (eEDM), and the scalar-pseudoscalar (S-PS) interaction coefficient (), in group-12 and group-2 systems. We use a relativistic coupled cluster method for our calculations, and find that group-12 monofluorides have largeand(for example, the values ofandof CnF, the heaviest group-12 fluoride, are 662 GV/cm and 3360 kHz, respectively). The reason for this is the contraction of the valenceandorbitals due to the weak screening effect of the outermost core'selectron. The calculations ofandshow that their ratio,, increases with. Based on these results, as well as experimental suitability, we propose SrF and CdF as candidate molecules for experiment.