Precision data generally require the threshold for physics beyond the Standard Model to be at the deca-TeV (10 TeV) scale or higher. This raises the question of whether there are interesting deca-TeV models for which the LHC may find direct clues. A possible scenario for such physics is a 5D warped model of fermion masses and mixing, with Kaluza-Klein masses m_KK ~ 10 TeV, allowing it to avoid tension with stringent constraints, especially from flavor data. Discovery of a Standard-Model-like Higgs boson, for which there are some hints at ~125 GeV at the LHC, would also require the KK masses to be at or above 10 TeV. These warped models generically predict the appearance of a much lighter radion scalar. We find that, in viable warped models of flavor, a radion with a mass of a few hundred GeV and an inverse coupling of order m_KK ~ 10 TeV could typically be accessible to the LHC experiments -- with sqrt(s) = 14 TeV and 100 fb^-1 of data. The above statements can be applied, mutatis mutandis, to 4D dual models, where conformal dynamics and a dilaton replace warping and the radion, respectively. Detection of such a light and narrow scalar could thus herald the proximity of a new physical threshold and motivate experiments that would directly probe the deca-TeV mass scale.
Neutral $Z$ boson pair production due to radion resonance in the Randall-Sundrum model: prospects at the CERN LHC
在大型强子对撞机（LHC）上，由于Radion共振而产生的中性$Z$玻色子对是探索扭曲几何（Randall-Sundrum模型）概念的一个有趣过程。由于迹线异常和顶（夸克）环增强了镭子与一对胶子的耦合，镭子可以提供比任何新物理效应更大的事件率可能性。使用适当的放射性顶-反顶（夸克离壳）耦合，我们得到了正确的Radion生产率在大型强子对撞机和探索的几个特点，较重的Radion衰变成一对真正的$Z$玻色子，随后衰变成带电的$4 l (l=e, μ)$轻子（镀金模式）。使用信号和背景事件率，我们得到了在$5σ$，$10σ$发现水平上的Radion质量$m_ϕ$和Radion vev $\vphi$的界限。
Radion effects on the production of an intermediate-mass scalar and Z at LEP II
我们研究了$e^+ e^- \to Z ϕ_i \to Z jj$过程，其中$ϕ_i$是希格斯玻色子和/或镭子玻色子。初步ALEPH数据的辐射效应的影响进行了讨论。在对$b$标记的四喷注数据的ALEPH分析中，比希格斯玻色子轻的镭子的情况是不利的，因为由于QCD迹线异常，镭子主要衰变为两个胶子喷注。如果镭子的质量与希格斯玻色子高度简并，则其截面可以增加超过一个sigma水平，并具有镭子真空期望值的自然尺度。
The Case for Future Hadron Colliders From $B \to K^{(*)} μ^+ μ^-$ Decays
最近对$B \to K^{(*)} μ^+ μ^-$衰变的测量与标准模型的预测有些不一致。它们可能是新物理学的先驱，其能量尺度可能直接发现。我们估计了未来强子对撞机对可能引起异常的新粒子的敏感性：细夸克或$Z^\prime$。我们认为亮度升级为14 TeV的LHC，33 TeV的LHC，和100 TeV的$pp$对撞机，如FCC-HH。$Z^\prime$型号的覆盖率非常高：对于窄粒子，微扰耦合可以解释$b$-$Z^\prime$质量高达20 TeV的衰变结果，33 TeV 1 ab $^{-1}$ LHC预计将覆盖质量高达8 TeV的大部分参数空间，而100 TeV的FCC-hh和10 ab $^{-1}$将覆盖全部。未来的对撞机将覆盖更小部分的leptoquark参数空间：例如，在$μ^+μ^-jj$双-细夸克搜索中，100 TeV 10 ab $^{-1}$对撞机具有高达12 TeV的细夸克质量的投影灵敏度（对于单个细夸克的产生，通过强耦合可扩展到21 TeV），而高达41 TeV的细夸克质量原则上可以解释异常。
