Cancellation mechanism in the predictions of electric dipole moments

被引：19

作者：

Bian, Ligong ^{[1
]}

Chen, Ning ^{[2
,3
]}

机构：

[1] Chongqing Univ, Dept Phys, Chongqing 401331, Peoples R China

[2] Univ Sci & Technol Beijing, Dept Phys, Beijing 100083, Peoples R China

[3] Chinese Acad Sci, Ctr Excellence Particle Phys, Beijing 100049, Peoples R China

来源：

PHYSICAL REVIEW D | 2017年 / 95卷 / 11期

基金：

中国国家自然科学基金;

关键词：

SUPERSYMMETRIC STANDARD MODEL; CP VIOLATION; HIGGS-BOSON; PHENOMENOLOGY; MSSM; TOOL;

D O I：

10.1103/PhysRevD.95.115029

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The interpretation of the baryon asymmetry of the Universe necessitates the CP violation beyond the Standard Model (SM). We present a general cancellation mechanism in the theoretical predictions of the electron electric dipole moments (EDM), quark chromo-EDMs, and Weinberg operators. A relative large CP violation in the Higgs sector is allowed by the current electron EDM constraint released by the ACME collaboration in 2013, and the recent Hg-199 EDM experiment. The cancellation mechanism can be induced by the mass splitting of heavy Higgs bosons around similar to O(0.1-1) GeV, and the extent of the mass degeneracy determines the magnitude of the CP-violating phase. We explicate this point by investigating the CP-violating two-Higgs-doublet model and the minimal supersymmetric Standard Model. The cancellation mechanism is general when there are CP violation and mixing in the Higgs sector of new physics models. The CP-violating phases in this scenario can be excluded or detected by the projected Ra-225 EDM experiments with precision reaching similar to 10(-28) e . cm, as well as the future colliders.

引用

页数：7

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