arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 1303.2371nucl-thhep-phnucl-ex
收藏

核子、原子核和原子的电偶极矩:标准模型及以后

Electric Dipole Moments of Nucleons, Nuclei, and Atoms: The Standard Model and Beyond

Jonathan Engel, Michael J. Ramsey-Musolf, U. van Kolck

摘要:

对分子、原子、核子和原子核的永久电偶极矩(EDM)的研究为探索标准模型(BSM)内外的CP破坏提供了强有力的探针。实验EDM限制的解释需要仔细描绘的物理学在很宽的距离尺度,从长距离的原子和分子尺度的物理学或超过费米尺度的短距离动力学。在这篇评论中,我们提供了一个框架,从这些不同的尺度上解开物理学的贡献,建立了一套从四维和六维的有效运营商,体现CP破坏在费米尺度。我们调查现有的计算与费米尺度CP破坏在实验系统的兴趣,强子和核矩阵元素,并量化这些计算的理论不确定性的水平。使用当前感兴趣的代表性BSM方案,我们说明了如何在各种尺度上的物理相互作用产生的EDM在一个潜在的可观察的水平。

英文摘要:

Searches for the permanent electric dipole moments (EDMs) of molecules, atoms, nucleons and nuclei provide powerful probes of CP violation both within and beyond the Standard Model (BSM). The interpretation of experimental EDM limits requires careful delineation of physics at a wide range of distance scales, from the long-range atomic and molecular scales to the short-distance dynamics of physics at or beyond the Fermi scale. In this review, we provide a framework for disentangling contributions from physics at these disparate scales, building out from the set of dimension four and six effective operators that embody CP violation at the Fermi scale. We survey existing computations of hadronic and nuclear matrix elements associated with Fermi-scale CP violation in systems of experimental interest, and quantify the present level of theoretical uncertainty in these calculations. Using representative BSM scenarios of current interest, we illustrate how the interplay of physics at various scales generates EDMs at a potentially observable level.

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。

↑