Searching for supersymmetry: the μνSSM
Searching for supersymmetry: the μνSSM
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DOI：
10.1140/epjst/e2020-000114-9
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发表时间：
2020-09
期刊：
影响因子：
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通讯作者：
D. López-Fogliani;C. Muñoz
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文献类型：
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作者：
D. López-Fogliani;C. Muñoz
本文综述了“μ from ν”超对称标准模型（μνSSM）在寻找超对称性中所起的作用。首先，我们讨论了它的理论动机，即通过引入右手中微子同时解决μ-和ν-问题。后者产生了R-宇称破坏（RPV），产生了新物理学的有趣信号。作为副产品，在μνSSM中有暗物质候选者，并且可以实现电弱重子生成。然后，我们调查的信号，该模型可以在大型强子对撞机（LHC）进行测试。除了扩大的Higgs扇区与sneutrinos，我们把特别的重点放在分析最轻的超对称粒子（LSP）的寿命和中微子汤川耦合的大小之间的密切联系。位移顶点和/或多重轻子是一些可以探测的有趣特征。最后，我们讨论了μνSSM的可能扩展，例如在超势中包含传统的三线性轻子数破坏耦合，在标准模型的对称性中增加额外的U（1）′规范群，或者将希格斯偶线重新解释为第四族轻子超场，从而激发了第四族矢量类夸克偶线超场的存在。
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.