R-symmetric flipped SU(5)
R-symmetric flipped SU(5)
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DOI：
10.1007/jhep11(2020)140
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发表时间：
2020-08
影响因子：
5.4
通讯作者：
K. Hamaguchi;S. Hor;N. Nagata
中科院分区：
文献类型：
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作者：
K. Hamaguchi;S. Hor;N. Nagata
我们构造了一个具有R对称性的超对称翻转SU（5）大统一模型。这种R对称性阻止了危险的不可重整化算符被截止尺度抑制到足够大的质量维度，因此SU（5）破缺的希格斯场在超对称性破缺效应的帮助下，沿着F-平坦和D-平坦方向发展出沿着统一尺度量级的真空期望值。Higgs场的质量项也被R对称性所禁止，从而解决了双三重态分裂问题。右手中微子的质量是由不可重整化的算符产生的，然后产生轻中微子质量谱，并通过与中微子振荡数据一致的跷跷板机制混合。这个模型预言了其中一个色三重态的希格斯多重态处于中间尺度，它的质量被质子衰变实验限制为105 × 1011 GeV。如果它是1012 GeV，未来在Hyper-Kamiokande的质子衰变实验可以在p→ π 0 μ+和p→ K 0 μ+衰变模式中测试我们的模型，而不是普通的大统一模型，其中p→ π 0 e+或p→是主要的衰变模式。质子衰变分支的这种特征预测使我们能够将我们的模型与其他场景区分开来。
We construct a supersymmetric flipped SU (5) grand unified model that possesses an R symmetry. This R symmetry forbids dangerous non-renormalizable operators suppressed by a cut-off scale up to sufficiently large mass dimensions so that the SU (5)-breaking Higgs field develops a vacuum expectation value of the order of the unification scale along the F-and D-flat directions, with the help of the supersymmetry-breaking effect. The mass terms of the Higgs fields are also forbidden by the R symmetry, with which the doublet-triplet splitting problem is solved with the missing partner mechanism. The masses of right-handed neutrinos are generated by non-renormalizable operators, which then yield a light neutrino mass spectrum and mixing through the seesaw mechanism that are consistent with neutrino oscillation data. This model predicts one of the color-triplet Higgs multiplets to lie at an intermediate scale, and its mass is found to be constrained by proton decay experiments to be≳ 5× 10 11 GeV. If it is≲ 10 12 GeV, future proton decay experiments at Hyper-Kamiokande can test our model in the p→ π 0 μ+ and p→ K 0 μ+ decay modes, in contrast to ordinary grand unified models where p→ π 0 e+ or p→is the dominant decay mode. This characteristic prediction for the proton decay branches enables us to distinguish our model from other scenarios.