The Higgs and some of the Standard Model superpartners may have been copiously produced at LEP and the Tevatron without being detected. We study a novel scenario of this type in which the Higgs decays predominantly into a light hidden sector either directly or through light SUSY states. Subsequent cascades increase the multiplicity of hidden sector particles which, after decaying back into the Standard Model, appear in the detector as clusters of collimated leptons known as lepton jets. We identify the relevant collider observables that characterize this scenario, and study a wide range of LEP and Tevatron searches to recover the viable regions in the space of observables. We find that the Higgs decaying to lepton jets can be hidden when the event topology mimics that of hadronic backgrounds. Thus, as many as 10^4 leptonic Higgs and SUSY decays may be hiding in the LEP and Tevatron data. We present benchmark models with a 100 GeV Higgs that are consistent with all available collider constraints. We end with a short discussion of strategies for dedicated searches at LEP, the Tevatron and the LHC, that allow for a discovery of the Higgs or SUSY particles decaying to lepton jets.
Investigating vector-like leptons decaying into an electron and missing transverse energy in e$^{+}$ e$^{-}$ collisions with $\sqrt{s} = 500$ GeV at the ILC
LHC search strategy for squarks in higgsino-LSP scenarios with leptons and $b$-jets in the final state
Higgsino超对称粒子（LSP）的情况下打开的可能性，强产生的粒子衰变到一个中间的中性伴子，由于汤川抑制的直接衰变到Higgsino。这些衰变会产生多重喷注信号，在中性伴子衰变到LSP的过程中会产生希格斯玻色子或$Z$玻色子。本文研究了产生$b$ -喷注和末态轻子的夸克的发现前景。我们的对撞机分析提供了信号的显着性在3 $σ$水平的亮度为1 ab $^{-1}$，并在5 $σ$水平，如果我们计划这些结果为3 ab $^{-1}$。
Precision radiative corrections to the semileptonic Dalitz plot with angular correlation between polarized decaying baryon and emitted charged lepton: Effects of the four-body region
Search for exotic leptons in final states with two or three leptons and fat-jets at 13 TeV LHC
Institute of Physics, Bhubaneswar（布巴内斯瓦尔物理研究所）；Homi Bhabha National Institute（霍米·巴巴国立研究所）；Department of Physics and Astrophysics, University of Delhi（德里大学物理与天体物理学系）
本文探讨了在13 TeV LHC中通过两个或三个轻子及一个或两个肥jets的最终状态探测质量超过1 TeV的奇异轻子，提出并研究了有效的搜索策略。
Search strategy for gluinos at the LHC with a Higgs boson decaying into tau leptons
在超对称场景中，暗物质候选者可能是类希格斯诺中性伴子，这意味着它的产生可能与希格斯玻色子有关。利用这一事实，我们提出了一个LHC搜索策略的最终状态的$τ$轻子的胶子，来自希格斯玻色子的衰变。我们考虑一对胶子的强产生，其中一个衰变为Higgsino+喷注，而另一个衰变为bino+喷注。接着，这个双星衰变为希格斯诺加上一个希格斯玻色子玻色子，最后衰变为$τ$ -轻子对。因此，所研究的实验信号由4个喷流、2个$τ$轻子和大量缺失的横向能量组成。我们的切割为基础的搜索策略，使我们能够达到，一个大型强子对撞机的质心能量为14 TeV和总积分亮度为1 ab $^{-1}$，高达2个标准差的意义，考虑系统的不确定性在SM背景的30%。对3 ab $^{-1}$的预测是令人鼓舞的，在证据水平上具有显著性，在更乐观的实验场景中可能超过4个标准差。
Precision radiative corrections to the Dalitz plot of baryon semileptonic decays including the spin-momentum correlation of the decaying baryon and the emitted charged lepton
