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arXiv 1605.07643hep-phhep-ex
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反Seesaw模型中的电子电偶极矩

Electron electric dipole moment in Inverse Seesaw models

Asmaa Abada, Takashi Toma

摘要:

在逆跷跷板机制的最小实现中,考虑了不育中微子对带电轻子电偶极矩的贡献,其中标准模型由两个右手中微子和两个不育费米子态扩展.我们的研究表明,两对(重)赝狄拉克质量本征态可以给电子的电偶极矩的显着贡献,躺在接近未来的实验灵敏度,如果他们的质量是以上的电弱标度。主要的贡献来自于两个回路图与伪狄拉克中微子状态运行的循环。在我们的分析中,我们进一步讨论了在这个框架中成功的leptogenesis的可能性,与大的电子电偶极矩兼容。

英文摘要:

We consider the contribution of sterile neutrinos to the electric dipole moment of charged leptons in the most minimal realisation of the Inverse Seesaw mechanism, in which the Standard Model is extended by two right-handed neutrinos and two sterile fermion states. Our study shows that the two pairs of (heavy) pseudo-Dirac mass eigenstates can give significant contributions to the electron electric dipole moment, lying close to future experimental sensitivity if their masses are above the electroweak scale. The major contribution comes from two-loop diagrams with pseudo-Dirac neutrino states running in the loops. In our analysis we further discuss the possibility of having a successful leptogenesis in this framework, compatible with a large electron electric dipole moment.

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