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Searching for supersymmetry: the μν SSM
The European Physical Journal Special Topics ( IF 2.6 ) Pub Date : 2020-12-14 , DOI: 10.1140/epjst/e2020-000114-9
Daniel E. López-Fogliani , Carlos Muñoz

We review the role played by the ‘μ from ν’ supersymmetric standard model (μνSSM) in the search for supersymmetry. First, we discuss its theoretical motivation, that is the simultaneous solution of μ- and ν-problems through the introduction of right-handed neutrinos. The latter produces R-parity violation (RPV), giving rise to interesting signals of new physics. As by-products, in the μνSSM there are dark matter candidates, and electroweak baryogenesis can be realized. Then, we survey signals by which the model could be tested at the large hadron collider (LHC). In addition to the enlarged Higgs sector with sneutrinos, we put special emphasis in analyzing the intimate connection between the lightest supersymmetric particle (LSP) lifetime and the size of neutrino Yukawa couplings. Displaced vertices and/or multileptons are some of the interesting signatures that can be probed. Finally, we discuss possible extensions of the μνSSM such as the inclusion in the superpotential of the conventional trilinear lepton-number violating couplings, the addition of an extra U(1)′ gauge group to the symmetry of the standard model, or the reinterpretation of the Higgs doublets as a fourth family of leptons superfields motivating the existence of a fourth family of vector-like quark doublet superfields.



中文翻译:

搜索超对称性:μνSSM

我们回顾由“扮演的角色μν超对称标准模型(” μν在寻找超对称SSM)。首先,我们讨论了其理论的动机,那就是同时解决μ -和ν -problems通过引入右手中微子。后者产生R奇偶校验违规(RPV),从而引起了新物理学的有趣信号。作为副产物,在μνSSM中有暗物质候选者,并且可以实现电弱重生。然后,我们调查可在大型强子对撞机(LHC)上测试模型的信号。除了扩大带有中微子的希格斯扇形外,我们还特别强调分析最轻的超对称粒子(LSP)寿命与中微子Yukawa耦合器尺寸之间的紧密联系。位移的顶点和/或多轻子是可以探究的一些有趣的特征。最后,我们讨论了μνSSM的可能扩展,例如在常规三线性轻子数违反耦合的超电势中包含,额外的U(1)将标度群归类为标准模型的对称性,或者将希格斯双峰作为轻子超场的第四族重新解释,从而激发了第四类矢量样夸克双峰超场的存在。

更新日期:2020-12-12
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