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arXiv 1810.01320hep-ph
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电偶极矩:理论综述

Electric dipole moments: a theory overview

Emanuele Mereghetti

摘要:

电偶极矩是对标准模型之外的物理学极其敏感的探测器。一个充满活力的实验计划已经到位,目标是将电子和中子电偶极矩的现有界限提高一到两个数量级,同时测试测量轻离子(如质子和氘核)电偶极矩的新想法。该计划的成功及其对超越标准模型的物理学的意义,依赖于根据由超越标准模型物理学引起的CP破坏算子的耦合来精确计算电偶极矩。鉴于低能QCD和核相互作用的非微扰性质,这些计算被证明是困难的,并且受到很大的理论不确定性的影响。在这次演讲中,我将回顾强子和核EDM计算的不同方面所取得的进展,仍然面临的挑战,以及我们对物理学的理解超越标准模型的影响。

英文摘要:

Electric dipole moments are extremely sensitive probes of physics beyond the Standard Model. A vibrant experimental program is in place, with the goal of improving existing bounds on the electron and neutron electric dipole moments by one or two orders of magnitude, while testing new ideas for the measurement of electric dipole moments of light ions, such as the proton and the deuteron, at a comparable level. The success of this program, and its implications for physics beyond the Standard Model, relies on the precise calculation of the electric dipole moments in terms of the couplings of CP-violating operators induced by beyond-the-Standard-Model physics. In light of the nonperturbative nature of both QCD at low energy and of the nuclear interactions, these calculations have proven difficult, and are affected by large theoretical uncertainties. In this talk I will review the progress that has been achieved on different aspects of the calculation of hadronic and nuclear EDMs, the challenges that remain to be faced, and the implications for our understanding of physics beyond the Standard Model.

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。

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