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arXiv 1305.0692hep-ph
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轻子混合矩阵的基于对称性的参数化

Symmetry based parameterizations of the lepton mixing matrix

Sanjeev Kumar

摘要:

有许多基于风味对称性的混合方案预测消失的$θ_{13}$。这些混合方案需要校正或修改,以考虑非零$θ_{13}$的最新实验测量。我们提出了新的轻子混合矩阵的参数化,以量化这些混合计划所需的最小修改。参数化可以分解为两部分:$U_{0}(a,b)$和$R(θ,ϕ)$。第一个因子可以被看作是一个零阶混合矩阵,它来自于某种味对称性。它再现了流行的混合方案的基础上风味对称性的适当值的$a$和$b$。第二个因子可以解释为对混合矩阵的最小修改,并且负责非零$θ_{13}$、非最大$θ_{23}$和CP破坏。我们还发现实验允许的参数空间的参数$a$和$b$,并比较它与这些参数的对称性为基础的值。

英文摘要:

There are many mixing schemes based upon flavor symmetries that predict a vanishing $θ_{13}$. These mixing schemes need corrections or modifications to account for recent experimental measurements of non-zero $θ_{13}$. We propose new parameterizations for the lepton mixing matrix to quantify the minimal modifications needed in these mixing schemes. The parameterizations can be factorized in two parts: $U_{0}(a,b)$ and $R(θ,ϕ)$. The first factor can be viewed as a zeroth order mixing matrix coming from some flavor symmetry. It reproduces the popular mixing schemes based upon flavor symmetries for suitable values of $a$ and $b$. The second factor can be interpreted as a minimal modification to the mixing matrix and is responsible for non zero $θ_{13}$, non-maximal $θ_{23}$ and CP violation. We also find the experimentally allowed parameter space for the parameters $a$ and $b$ and compare it with the symmetry based values for these parameters.

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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