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arXiv 0705.4559hep-ph
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太阳中微子混合的黄金比例预言

The golden ratio prediction for the solar neutrino mixing

Yuji Kajiyama, Martti Raidal, Alessandro Strumia

摘要:

我们提出了一个简单的纹理,预测太阳中微子混合角的余切等于黄金分割率。这个预测是1.4个标准差低于目前的最佳拟合值和最终的SNO和KamLAND数据可以区分它从三-双-最大混合。中微子质量矩阵在Z_2 x Z '_2对称下是不变的:几何上是沿着黄金矩形对角线的反射。假设夸克扇区中存在类似的结构,这表明卡比博角的黄金预测是θ C = π/4-θ 12 = 13.3度,其不确定性可与V_{ub}相比。

英文摘要:

We present a simple texture that predicts the cotangent of the solar neutrino mixing angle to be equal to the golden ratio. This prediction is 1.4 standard deviations below the present best-fit value and final SNO and KamLAND data could discriminate it from tri-bi-maximal mixing. The neutrino mass matrix is invariant under a Z_2 x Z'_2 symmetry: that geometrically is a reflection along the diagonal of the golden rectangle. Assuming an analogous structure in the quark sector suggests a golden prediction for the Cabibbo angle, theta_C = pi/4- theta_12 = 13.3 degree, up to uncertainties comparable to V_{ub}.

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