arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 2501.02744nucl-th
收藏

核席夫矩与CP破坏

Nuclear Schiff Moments and CP Violation

Jonathan Engel

AI总结:

本文综述核席夫矩计算及其与CP破坏的联系,并重点介绍利用介质内相似性重整化群和耦合簇理论等从头算方法更精确计算$^{199}$Hg、$^{225}$Ra等原子核席夫矩的途径。

摘要:

本文回顾了核席夫矩的计算,要解释在某些原子和分子中寻找时间反演破坏电偶极矩的实验,就必须了解这些计算。在简要回顾了粒子物理标准模型之内及之外的偶极矩与CP破坏之间的联系、涉及电子屏蔽核电偶极矩的席夫定理、席夫矩以及测量原子和分子偶极矩的实验之后,本文考察了在诸如$^{199}$Hg等原子核以及诸如$^{225}$Ra等八极形变同位素中计算席夫矩的尝试,这些同位素在实验中特别有用。随后,本文转向从头算核结构理论,描述了如何利用介质内相似性重整化群和耦合簇理论这两种方法,比迄今所采用的受控程度较低的方法更准确地计算重要的席夫矩。

英文摘要:

This paper reviews the calculation of nuclear Schiff moments, which one must know in order to interpret experiments that search for time-reversal-violating electric dipole moments in certain atoms and molecules. After briefly reviewing the connection between dipole moments and CP violation in and beyond the Standard Model of particle physics, Schiff's theorem, which concerns the screening of nuclear electric dipole moments by electrons, Schiff moments, and experiments to measure dipole moments in atoms and molecules, the paper examines attempts to compute Schiff moments in nuclei such as $^{199}$Hg and octupole-deformed isotopes such as $^{225}$Ra, which are particularly useful in experiments. It then turns to ab initio nuclear-structure theory, describing ways in which both the In-Medium Similarity Renormalization Group and coupled-cluster theory can be used to compute important Schiff moments more accurately than the less controlled methods that have been applied so far.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

↑