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arXiv 1005.4450hep-ph
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极小超对称标准模型中的低尺度非普适非反常U(1 π '_F

Low Scale Non-universal, Non-anomalous U(1)'_F in a Minimal Supersymmetric Standard Model

Mu-Chun Chen, Jinrui Huang

摘要:

我们提出了一个非普适的U(1 π ′_F)对称性与最小超对称标准模型的结合.所有的异常取消条件得到满足,没有外来领域以外的三个右手中微子。由于我们的模型允许所有三代手征超场具有不同的U(1 π '_F荷,当U(1 π'_F对称性在低尺度下破缺时,我们得到了夸克和轻子扇区中真实的质量和混合角。在我们的模型中,中微子被预言为狄拉克费米子,它们的质量排序是倒等级类型。手征超场的U(1 π ′ F)荷也自然地抑制了μ项,并自动禁止了重子数和轻子数违反算符.虽然在下夸克和带电轻子扇区中的所有变味中性流约束都可以满足,但我们发现D 0-D 0 bar的约束比精确的电弱数据的约束严格得多。

英文摘要:

We propose a non-universal U(1)'_F symmetry combined with the Minimal Supersymmetric Standard Model. All anomaly cancellation conditions are satisfied without exotic fields other than three right-handed neutrinos. Because our model allows all three generations of chiral superfields to have different U(1)'_F charges, upon the breaking of the U(1)'_F symmetry at a low scale, realistic masses and mixing angles in both the quark and lepton sectors are obtained. In our model, neutrinos are predicted to be Dirac fermions and their mass ordering is of the inverted hierarchy type. The U(1)'_F charges of the chiral super-fields also naturally suppress the mu term and automatically forbid baryon number and lepton number violating operators. While all flavor-changing neutral current constraints in the down quark and charged lepton sectors can be satisfied, we find that constraint from D0-D0bar turns out to be much more stringent than the constraints from the precision electroweak data.

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