arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0902.4405hep-ph
收藏

标准模型超对称扩展B-L中的电子EDM和软稀薄成因

Electron EDM and soft leptogenesis in supersymmetric B-L extension of the standard model

Yuji Kajiyama, Shaaban Khalil, Martti Raidal

摘要:

我们在标准模型的超对称$B-L$扩展中分析了电子电偶极矩与软引力发生之间的联系。在这个模型中,$B-L$对称性在TeV尺度上被辐射破缺。因此,它是一个自然的框架,低规模的跷跷板机制,也为实现软leptogenesis。我们发现三线性软超对称破缺耦合$A$,这是相关的轻子不对称性的阶段,不受目前的电偶极矩的实验界限。正如在用右手中微子扩展的MSSM中一样,成功的轻子生成需要小的双线性耦合$B$,现在由$A_N$和$B-L$破坏VEV给出。具有非通用$A$ -项的SUSY $B-L$模型,使得$A_N=0$而$A_ν\neq0$是软瘦体发生的有希望的场景。拟议的EDM实验将在未来测试这一情景。

英文摘要:

We analyze the connection between electric dipole moment of the electron and the soft leptogenesis in supersymmetric $B-L$ extension of the standard model. In this model, the $B-L$ symmetry is radiatively broken at TeV scale. Therefore, it is a natural framework for low scale seesaw mechanism and also for implementing the soft leptogenesis. We show that the phases of trilinear soft SUSY breaking couplings $A$, which are relevant for the lepton asymmetry, are not constrained by the present experimental bounds on electric dipole moment. As in the MSSM extended with right-handed neutrinos, successful leptogenesis requires small bilinear coupling $B$, which is now given by $A_N$ and $B-L$ breaking VEVs. SUSY $B-L$ model with non-universal $A$-terms such that $A_N=0$ while $A_ν\neq0$ is a promising scenario for soft leptogenesis. The proposed EDM experiments will test this scenario in the future.

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。

↑