Minimal Nambu-Goldstone-Higgs model in supersymmetric SU(5) revisited
Minimal Nambu-Goldstone-Higgs model in supersymmetric SU(5) revisited
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DOI：
10.1103/physrevd.107.035016
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发表时间：
2022-10
影响因子：
5
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
我们重新审视了最小Nambu-Goldstone（NG）Higgs超对称（SUSY）SU（5）大统一模型，并研究了它的唯象意义。该模型的Higgs扇区具有整体SU（6）对称性，它是自发破缺的，并导致最小SUSY标准模型（MSSM）的Higgs双峰作为NG手征超场。因此，该模型自然地导致了轻的希格斯二重态，并解决了二重态-三重态分裂问题。由于SU（6）对称性，希格斯扇区的耦合受到严格限制，因此该模型比最小SUSY SU（5）更具预测性。我们通过统一尺度下规范耦合常数的匹配条件确定了所有的大统一理论参数，并计算了质子寿命，这与目前的实验界限。我们讨论了这个模型是不兼容的约束MSSM，而它有一个大的可行的参数空间在高尺度超对称的情况下。伴随希格斯场三线性耦合的微扰条件对维诺（胶子）质量施加了上（下）限，这意味着这些高吉诺的层次质量模式。未来的质子衰变搜索可以探测参数空间的很大一部分，特别是如果超对称性破缺标度是$\lesssim 100$~TeV。
We revisit the minimal Nambu-Goldstone (NG) Higgs supersymmetric (SUSY) SU(5) grand unified model and study its phenomenological implications. The Higgs sector of the model possesses a global SU(6) symmetry, which is spontaneously broken and results in the Higgs doublets of the minimal SUSY Standard Model (MSSM) as NG chiral superfields. Therefore, the model naturally leads to light Higgs doublets and solves the doublet-triplet splitting problem. Because of the SU(6) symmetry, the couplings of the Higgs sector are tightly restricted, and thus the model is more predictive than the minimal SUSY SU(5). We determine all the grand-unified-theory parameters via the matching conditions of the gauge coupling constants at the unification scale and calculate proton lifetime, confronting this with current experimental bounds. We discuss that this model is incompatible with the constrained MSSM, whilst it has a large viable parameter space in the high-scale SUSY scenario. The perturbativity condition on the trilinear coupling of the adjoint Higgs field imposes an upper (lower) limit on the wino (gluino) mass, implying a hierarchical mass pattern for these gauginos. Future proton-decay searches can probe a large part of the parameter space, especially if the SUSY-breaking scale is $\lesssim 100$~TeV.