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arXiv 2203.01796hep-phhep-ex
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睡眠SUSY:从UV框架到IR现象学

Sleptonic SUSY: From UV Framework to IR Phenomenology

Kaustubh Agashe, Majid Ekhterachian, Zhen Liu, Raman Sundrum

摘要:

我们研究了一个有吸引力的方案,"睡眠超对称性",它调和了$125$ GeV希格斯标量和非观测的超伙伴,迄今为止潜在的关键作用为slepton现象:提供可行的正在进行的LHC发现的目标,将一个共同湮灭的合作伙伴可检测的热遗迹暗物质,并能够调解潜在的μ子$g-2$异常。这是由一个适度的层次谱,与子TeV的slepton和electroweakinos和多TeV的质量为其他新的国家。我们研究了新的元素在紫外MSSM实现睡眠超对称性的基础上更高的维度螯合和由此产生的高吉诺调解,超荷$D$-长期调解和希格斯介导的超对称性打破之间的协同作用,以便更充分地捕捉的可能性范围。这个框架突出和谐解决风味,CP和$μ- Bμ$问题的超对称范式。我们讨论了它的扩展orbifold大统一理论,包括规范耦合和$b$-tau统一。我们还开发了一个非最小的模型与额外的希格斯场,其中的电弱真空更容易宇宙学稳定的对衰变到一个电荷破裂的真空,允许更广泛的sleptonic光谱比单独的MSSM。我们调查丰富的信号可能在大型强子对撞机和未来的对撞机,涵盖了$R$-宇称守恒和违反,以及暗物质检测。虽然多TeV的方块意味着一个小的层次问题,有趣的是,在参数空间中的小变化,以提高自然的结果在戏剧性的相变,要么电弱保存或电荷断裂。在多元宇宙的背景下,适度的不自然可以用“危险生活原则”来解释。

英文摘要:

We study an attractive scenario, "Sleptonic SUSY", which reconciles the $125$ GeV Higgs scalar and the non-observation of superpartners thus far with potentially pivotal roles for slepton phenomenology: providing viable ongoing targets for LHC discovery, incorporating a co-annihilation partner for detectable thermal relic dark matter, and capable of mediating the potential muon $g-2$ anomaly. This is accomplished by a modestly hierarchical spectrum, with sub-TeV sleptons and electroweakinos and with multi-TeV masses for the other new states. We study new elements in the UV MSSM realization of Sleptonic SUSY based on higher-dimensional sequestering and the synergy between the resulting gaugino-mediation, hypercharge $D$-term mediation and Higgs-mediation of SUSY-breaking, so as to more fully capture the range of possibilities. This framework stands out by harmoniously solving the flavor, CP and $μ- Bμ$ problems of the supersymmetric paradigm. We discuss its extension to orbifold GUTs, including gauge-coupling and $b$-tau unification. We also develop a non-minimal model with extra Higgs fields, in which the electroweak vacuum is more readily cosmologically stable against decay to a charge-breaking vacuum, allowing a broader range of sleptonic spectra than in the MSSM alone. We survey the rich set of signals possible at the LHC and future colliders, covering both $R$-parity conservation and violation, as well as for dark matter detection. While the multi-TeV squarks imply a Little Hierarchy Problem, intriguingly, small changes in parameter space to improve naturalness result in dramatic phase transitions to either electroweak-preservation or charge-breaking. In a Multiverse setting, the modest unnaturalness may then be explained by the "principle of living dangerously".

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