Common origin of pi-tau and CP breaking in the neutrino seesaw, baryon asymmetry, and hidden flavor symmetry
Common origin of pi-tau and CP breaking in the neutrino seesaw, baryon asymmetry, and hidden flavor symmetry
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DOI：
10.1103/physrevd.84.033009
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发表时间：
2011-04
影响因子：
5
通讯作者：
H. He;Furong Yin
中科院分区：
文献类型：
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作者：
H. He;Furong Yin
我们推测所有的CP违反（狄拉克和马约拉纳类型）都来自中微子跷跷板中的一个共同起源。利用这个概念上吸引人的简单猜想，我们推导出mu-tau破缺与所有CP破缺具有共同的起源。我们研究了跷跷板拉格朗日的Dirac质量矩阵中mu-tau和CP破缺的共同起源（右手中微子是mu-tau盲的），这唯一地导致了光中微子的倒质量排序。然后，我们预测了两个小的mu-tau断裂可观测值之间的非常不同的相关性(13)- 0度和(23)- 45度，这可以饱和目前的实验上限（13）。这将通过正在进行的振荡实验来测试我们之前的常规质量排序方案。我们还分析了theta（13）与Jarlskog不变量和可观测的中微子β β衰变的相关性。从中微子跷跷板中CP和mu-tau破缺的共同起源出发，我们建立了重子不对称的低能CP违反和宇宙学CP违反之间的直接联系。有了这些，我们进一步预测了θ(13)的下界，支持在大亚湾、双Chooz和RENO实验中正在进行的θ(13)探测。最后，我们分析了轻中微子扇区的一般模型无关的Z(2)圆乘以Z(2)对称结构，并将其映射到跷跷板扇区，其中一个Z(2) s对应于mu-tau对称Z(2)(mu tau)，另一个隐藏对称Z(2)(s)（在我们之前的工作中揭示），它决定了太阳混合角theta（12）。我们推导了这个Z(2)(s)的物理结果，以及在存在mu-tau破缺（有或没有中微子跷跷板）的情况下它可能的部分违反，关于theta（12）的确定和mu-tau破缺观测值之间的相关性。
We conjecture that all CP violations (both Dirac and Majorana types) arise from a common origin in the neutrino seesaw. With this conceptually attractive and simple conjecture, we deduce that mu-tau breaking shares the common origin with all CP violations. We study the common origin of mu-tau and CP breaking in the Dirac mass matrix of seesaw Lagrangian (with right-handed neutrinos being mu-tau blind), which uniquely leads to inverted mass ordering of light neutrinos. We then predict a very different correlation between the two small mu-tau breaking observables theta(13) - 0 degrees and theta(23) - 45 degrees, which can saturate the present experimental upper limit on theta(13). This will be tested against our previous normal mass-ordering scheme by the ongoing oscillation experiments. We also analyze the correlations of theta(13) with Jarlskog invariant and neutrinoless beta beta-decay observable. From the common origin of CP and mu-tau breaking in the neutrino seesaw, we establish a direct link between the low energy CP violations and the cosmological CP violation for baryon asymmetry. With these we further predict a lower bound on theta(13), supporting the ongoing probes of theta(13) at Daya Bay, Double Chooz, and RENO experiments. Finally, we analyze the general model-independent Z(2) circle times Z(2) symmetry structure of the light neutrino sector, and map it into the seesaw sector, where one of the Z(2)'s corresponds to the mu-tau symmetry Z(2)(mu tau) and another the hidden symmetry Z(2)(s) (revealed in our previous work) which dictates the solar mixing angle theta(12). We derive the physical consequences of this Z(2)(s) and its possible partial violation in the presence of mu-tau breaking (with or without the neutrino seesaw), regarding the theta(12) determination and the correlation between mu-tau breaking observables.