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arXiv 1011.4577hep-phastro-ph.HEhep-exnucl-exnucl-th
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味统一,暗物质,质子衰变和其他具有低尺度$S_4$对称性的可观测预测

Flavor unification, dark matter, proton decay and other observable predictions with low-scale $S_4$ symmetry

Mina K. Parida, Pradip K. Sahu, Kalpana Bora

摘要:

我们展示了如何规范耦合统一成功地实现通过非超对称大统一理论,$SO(10)\times G_f (~G_f=S_4, SO(3)_f, SU(3)_f)$,使用低尺度风味对称模型的类型$SU(2)_L\times U(1)_Y$ $ \times SU(3)_C \times S_4$最近提出的Hagedorn,Lindner和Mohapatra,同时分配物质宇称离散对称性的暗物质稳定性。对于规范耦合统一在单步破缺的情况下,我们表明,一个色八重态费米子和超荷弱三重态费米子暗物质是失踪的粒子需要完成其MSSM等效的自由度。当这些都包括在内的模型自动预测非超对称大统一的规模相同的最小超对称标准模型/大统一理论规模。我们还发现了一个两步破缺模型与Pati-Salam中间对称性的暗物质和一个低质量的色八重标量或费米子的大统一的信号。质子寿命的预测被发现是可访问的正在进行的或计划中的搜索在一些模型。我们讨论了轻费米子三重态暗物质、色八重态费米子及其唯象的大统一起源。

英文摘要:

We show how gauge coupling unification is successfully implemented through non-supersymmetric grand unified theory, $SO(10)\times G_f (~G_f=S_4, SO(3)_f, SU(3)_f)$, using low-scale flavor symmetric model of the type $SU(2)_L\times U(1)_Y$ $ \times SU(3)_C \times S_4$ recently proposed by Hagedorn, Lindner, and Mohapatra, while assigning matter-parity discrete symmetry for the dark matter stability. For gauge coupling unification in the single-step breaking case, we show that a color-octet fermion and a hyperchargeless weak-triplet fermionic dark matter are the missing particles needed to complete its MSSM-equivalent degrees of freedom. When these are included the model automatically predicts the nonsupersymmetric grand unification with a scale identical to the minimal supersymmetric standard model/grand unified theory scale. We also find a two-step breaking model with Pati-Salam intermediate symmetry where the dark matter and a low-mass color-octet scalar or the fermion are signaled by grand unification. The proton-lifetime predictions are found to be accessible to ongoing or planned searches in a number of models. We discuss grand unified origin of the light fermionic triplet dark matter, the color-octet fermion, and their phenomenology.

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