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arXiv 2003.09921hep-ph
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CP违反CKM和PMNS矩阵的相位和规则$δ^q_{\rm KM}+δ^l_{\rm KM}=0$

CP violating phase sum rule $δ^q_{\rm KM}+δ^l_{\rm KM}=0$ for CKM and PMNS matrices

Junxing Pan, Jin Sun, Xiao-Dong Ma, Xiao-Gang He

摘要:

CKM和PMNS混合矩阵中的非零狄拉克相位$δ^q$和$δ^l$表示CP破坏。一般来说,他们是独立的。然而,包括最近的T2K结果的实验数据表明,在混合矩阵的原始KM参数化中,和$δ^q_{\rm KM} + δ^l_{\rm KM}$接近于零,其中$δ^q_{\rm KM}$近似为$π/2$。KM参数化可能提供了一些提示,这些阶段实际上是相关的,CP是最大限度地违反。我们表明,这种求和规则可以容纳在模型中的自发CP违反两个阶段起源于一个非平凡的共同的自发CP违反最大化阶段的希格斯势。我们发现了一些有趣的现象学后果的味道改变中性电流和CP违反这样一个模型。特别是,从$B_s - \bar B_s$混合的数据提供了非常强的约束的质量尺度的新的中性标量模型中,但该模型仍然允许电子和中子的电偶极矩达到其当前的上限。该模型可以通过近期的实验进行检验。

英文摘要:

The non-zero Dirac phases $δ^q$ and $δ^l$ in the CKM and PMNS mixing matrices signify CP violation. In general they are independent. Experimental data including recent T2K results show, however, that in the original KM parameterization for the mixing matrix, the sum $δ^q_{\rm KM} + δ^l_{\rm KM}$ is close to zero with $δ^q_{\rm KM}$ to be approximately $π/2$. The KM parameterization may have provided some hints that these phases are actually related and CP is maximally violated. We show that this sum rule can be accommodated in models with spontaneous CP violation where both phases originate from a non-trivial common spontaneous CP violating maximized phase in the Higgs potential. We find some interesting phenomenological consequences for flavor changing neutral current and CP violation for such a model. In particular, data from $B_s - \bar B_s$ mixing provide very strong constraints on the mass scale for the new neutral scalars in the model, yet the model still allows the electric dipole moments of electron and neutron to reach to their current upper bounds. The model can be tested by near future experiments.

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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