Reflection symmetries and universal four-zero texture.

Reflection symmetries and universal four-zero texture.
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DOI:
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发表时间:
2020-03
期刊:
arXiv: High Energy Physics - Phenomenology
影响因子:
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通讯作者:
M. J. Yang
M. J. Yang
中科院分区:
其他
文献类型:
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作者:
M. J. Yang

文献摘要

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本文考虑了SM中的一组新的精确对称,即反射对称R = m u,n u,m d,e ^{*} = m d,e,其中R = diag(-1,1,1).这些对称性是$\mu-\tau$反射对称性在扣除$\mu-\tau$对称性后的残余。这些扩展的$C$对称性可以预测零QCD $\theta$-term $\theta_{\rm QFD}=0$在树的水平与适当的$CP$相位的CKM和MNS矩阵。此外,它们还可以将Majorana位相限制为$\alpha_{2,3} /2 = 0$或$\pi /2$,从而提高了对细长体发生的预测能力。
In this paper, we consider a set of new exact symmetry in the SM, {\it reflection} symmetries $R m_{u,\nu}^{*} R = m_{u,\nu}, ~ m_{d,e}^{*} = m_{d,e}$ with $R =$ diag $(-1,1,1)$. These symmetries are remnants of $\mu-\tau$ reflection symmetries after deduction of $\mu-\tau$ symmetry. These extended $C$ symmetries can predict the zero QCD $\theta$-term $\theta_{\rm QFD}=0$ at tree level with proper $CP$ phases $\delta_{CP}$ of the CKM and MNS matrices. Moreover, they can constrain the Majorana phases to be $\alpha_{2,3} /2 = 0$ or $\pi /2$ and then enhance predictivity of the leptogenesis.