Supersymmetric standard models with a pseudo-Dirac gluino from hybrid F - and D -term supersymmetry breaking
Supersymmetric standard models with a pseudo-Dirac gluino from hybrid F - and D -term supersymmetry breaking
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DOI：
10.1103/physrevd.92.015008
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发表时间：
2015-02
影响因子：
5
通讯作者：
Ran Ding;Tianjun Li;F. Staub;C. Tian;B. Zhu
中科院分区：
文献类型：
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作者：
Ran Ding;Tianjun Li;F. Staub;C. Tian;B. Zhu
我们提出了超对称标准模型 (SSM)，其具有来自混合 $F-$ 和 $D-$term 超对称 (SUSY) 破缺的伪狄拉克胶。与大型强子对撞机之前的SSM类似，最小SSM（MSSM）中的所有超对称粒子都从传统重力介导中获得了SUSY破软项，并且除了gluino之外，其质量都在约1 TeV以内。为了逃避大型强子对撞机 SUSY 搜索限制，胶子还具有来自 $D-$term SUSY 断裂的高于 3 TeV 的重狄拉克质量。有趣的是，如此重的狄拉克胶质量不会引起电弱微调问题。我们通过受弦模型启发的异常 $U(1)_X$ 规范对称性来实现这种 SUSY 断裂。为了保持规范耦合统一并增加希格斯玻色子质量，我们引入了额外的矢量状粒子。我们研究了满足当前所有实验约束的可行参数空间，并提出了具体的基准点。这种模型不仅保留了LHC之前的SSM的自然性、暗物质等优点，而且解决了狄拉克高吉诺SSM中由于$F$项重力介导而可能出现的问题。
We propose the Supersymmetric Standard Models (SSMs) with a pseudo-Dirac gluino from hybrid $F-$ and $D-$term supersymmetry (SUSY) breakings. Similar to the SSMs before the LHC, all the supersymmetric particles in the Minimal SSM (MSSM) obtain the SUSY breaking soft terms from the traditional gravity mediation and have masses within about 1 TeV except gluino. To evade the LHC SUSY search constraints, the gluino also has a heavy Dirac mass above 3 TeV from $D-$term SUSY breaking. Interestingly, such a heavy Dirac gluino mass will not induce the electroweak fine-tuning problem. We realize such SUSY breakings via an anomalous $U(1)_X$ gauge symmetry inspired from string models. To maintain the gauge coupling unification and increase the Higgs boson mass, we introduce extra vector-like particles. We study the viable parameter space which satisfies all the current experimental constraints, and present a concrete benchmark point. This kind of models not only preserves the merits of pre-LHC SSMs such as naturalness, dark matter, etc, but also solves the possible problems in the SSMs with Dirac gauginos due to the $F$-term gravity mediation.