论文标题

中期审查:LHC运行2和吨级贵族液体wimp搜索后弱尺度超对称的状态

Midi-review: Status of weak scale supersymmetry after LHC Run 2 and ton-scale noble liquid WIMP searches

论文作者

Baer, Howard, Barger, Vernon, Salam, Shadman, Sengupta, Dibyashree, Sinha, Kuver

论文摘要

尽管LHC发现了质量M_H〜125 GEV的非常标准的模型的Higgs玻色子,但在LHC或WIMP SEACH实验中已经出现了超出标准模型以外物理的实心信号。对于弱尺度超对称性(SUSY)的情况,LHC通常发现Gluinos超过2.2 TEV,而顶部的squark必须超过1.1 TEV。这些限制与1980年代至1990年代出现的较旧的简单自然概念相矛盾,这导致了相当悲观的观点,即Susy现在被排除在外,除了可能剩下的一些狭窄的参数空间角。然而,这张图片忽略了21世纪出现的Susy/String理论中的几个重要发展:1。弦理论格局的出现及其对宇宙恒定问题的解决方案,2。对自然性的一种更加细致的观点,包括“刺耳的自然性”的概念,3。质子衰减和4。包括解决强CP问题的解决方案的重要性。相当普遍的考虑,弦理论景观有利于较大的软项值,但要遵守电子对称性被正确损坏的真空选择标准(无CCB最小值),而弱尺度的最大程度距离我们的测量值也不太远。然后,丝状自然性预测希格斯质量m_h〜125 gev,而质量质量通常会超出当前的LHC边界。鉴于LHC和暗物质搜索结果所面临的这些完善的观点,我们回顾了LHC,ILC和暗物质特征最有可能由弱尺度SUSY引起的,如我们今天所了解的那样。

While LHC has discovered a very Standard Model-like Higgs boson of mass m_h~ 125 GeV, no solid signal for physics beyond the Standard Model has emerged so far at LHC or at WIMP seach experiments. For the case of weak scale supersymmetry (SUSY), LHC has found rather generally that gluinos are beyond about 2.2 TeV whilst top squark must lie beyond 1.1 TeV. These limits contradict older simplistic notions of naturalness that emerged in the 1980s-1990s, leading to the rather pessimistic view that SUSY is now excluded except for perhaps some remaining narrow corners of parameter space. Yet, this picture ignores several important developments in SUSY/string theory that emerged in the 21st century: 1. the emergence of the string theory landscape and its solution to the cosmological constant problem, 2. a more nuanced view of naturalness including the notion of "stringy naturalness", 3. the emergence of anomaly-free discrete R-symmetries and their connection to R-parity, Peccei-Quinn symmetry, the SUSY mu problem and proton decay and 4. the importance of including a solution to the strong CP problem. Rather general considerations from the string theory landscape favor large values of soft terms, subject to the vacuum selection criteria that electroweak symmetry is properly broken (no CCB minima) and the resulting magnitude of the weak scale is not too far from our measured value. Then stringy naturalness predicts a Higgs mass m_h~ 125 GeV whilst sparticle masses are typically lifted beyond present LHC bounds. In light of these refinements in theory perspective confronted by LHC and dark matter search results, we review the most likely LHC, ILC and dark matter signatures that are expected to arise from weak scale SUSY as we understand it today.

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