We discuss the sensitivity of a 100 TeV $pp$ collider to heavy resonances produced in longitudinal vector boson scattering and decaying to a pair of Higgs bosons. A Monte Carlo study has been performed using the $H \to ττ$ decay channel for both Higgs bosons, comparing the kinematics of such a signal to the irreducible Standard Model backgrounds. The results are presented in the context of a phenomenological model of a resonance ($η$) coupling to goldstone modes, $V_L V_L \to η\to HH$, as can arise in composite Higgs models. With a fractional width of 70% (20%), the $5 σ$ discovery reach is 4.2 (2.9) TeV in resonance mass for 10 ab$^{-1}$ of integrated luminosity. We also discuss the dependence of the mass reach on the collider energy and integrated luminosity.
We present the results of the physics reach of a multi-TeV muon collider for popular models of physics beyond the Standard Model. We include also details about a model predicting the scalar dark matter in the spectrum. Finally we present some preliminary results about the Effective Vector Approximation and its implementation in the Monte Carlo generator {\sc MadGraph5\_aMC@NLO}.
We consider triple Higgs boson production at a future 100 TeV proton-proton collider. We perform a survey of viable final states and compare and contrast triple production to Higgs boson pair production. Focussing on the $hhh \rightarrow (b\bar{b}) (b\bar{b}) (γγ)$ final state, we construct a baseline analysis for the Standard Model scenario and simple deformations, demonstrating that the process merits investigation in the high-luminosity phase of the future collider as a new probe of the self-coupling sector of the Higgs boson.
Strongly Interacting Vector Bosons at TeV e+-e- Linear Colliders -Addendum-
扩展早期的调查，我们分析了强相互作用的电弱玻色子在高能e+-e-对撞机的准弹性散射。在c. m处检验了三个过程e+e-> bar-nu nu W+W-、bar-nu nu ZZ和e-e-> W-W-。能量为1 TeV的高亮度运行。估计了1 TeV对撞机上WW相互作用手征展开中的主导阶的无参数散射振幅的预期实验误差为10%，为打破电弱对称性的强相互作用机制提供了严格的检验。
We discuss the search for a CP-odd scalar decaying into gauge bosons in the framework of a CP-conserving two-Higgs doublet model (2HDM) and of a 2HDM extended with a vector-like quark (VLQ) at the Large Hadron Collider and at a future 100 TeV collider. The rate of decay of a pseudoscalar to $Z$-bosons could be important to ascertain the CP-nature of the scalars in the model. In the 2HDM $A \to ZZ$ will be extremely hard to detect even at a future 100 TeV $pp$ collider while in the 2HDM+VLQ this decay can be probed even during the present LHC run. We further discuss all decays of the pseudoscal…
We present cross-section expectations for various processes and collider options, for benchmark scenarios of the Inert Doublet Model, a Two Higgs Doublet Model with a dark matter candidate. The proposed scenarios are consistent with current dark matter constraints, including the most recent bounds from the XENON1T experiment and relic density, as well as with known collider and low-energy limits. These benchmarks, chosen in earlier work for studies at $e^+e^-$ colliders, exhibit a variety of kinematic features that should be explored at current and future runs of the LHC. We provide cross sect…
Potential discovery, observation and exclusion limits of excited $u$ and $d$ quarks with gamma+jet final state are researched at the multi-TeV scale colliders, FCC and S$pp$C in this work. Both colliders, FCC and S$pp$C, show that excited $u$ and $d$ quarks could be discovered up to 42.1 TeV and 55.2 TeV for $u^\star$, 30.3 TeV and 39.4 TeV for $d^\star$ and 42.3 TeV and 55.5 TeV mass values for degenerate case (m$_{u^\star}$ = m$_{d^\star}$), respectively. Determination of excited quarks compositeness scale is examined, which will be up to multi-PeV level. Beside these analysis, free paramete…
高能物理界正在考虑建造一台100 TeV pp对撞机，作为继大型强子对撞机和高亮度大型强子对撞机物理方案完成之后，我们这一领域未来发展的重要一步。特别是，欧洲核子研究中心正在考虑将100 TeV pp碰撞作为未来圆形对撞机设施的关键目标，该设施围绕100公里的隧道建造，旨在提供pp，e+e-和ep碰撞，此外还有一个重离子束和注入器复杂的计划。CERN正在协调一项国际研究，任务是在2018年底前完成该设施的概念设计报告（CDR）。本文介绍了该研究计划（FCC-hh）的强子部分的物理潜力评估的第一批结果。
We study the complementarity of the proposed multi-TeV muon colliders and the near-future gravitational wave (GW) detectors to the first order electroweak phase transition (FOEWPT), taking the real scalar extended Standard Model as the representative model. A detailed collider simulation shows the FOEWPT parameter space can be greatly probed via the the vector boson fusion production of the singlet, and its subsequent decay to the di-Higgs or di-boson channels. Especially, almost all the parameter space yielding detectable GW signals can be probed by the muon colliders. Therefore, if we could …
Testable SUSY spectra from GUTs at a 100 TeV pp collider
大统一理论（GUT）是更基本的基本粒子理论的有吸引力的候选者。它们不仅可以统一标准模型（SM）的相互作用，而且还可以统一不同类型的SM费米子，特别是夸克和轻子，在大统一规范群的联合表示。我们讨论了如何比较预测超对称大统一理论模型与夸克和带电轻子质量的实验结果导致超对称谱的约束。我们展示了一个例子，从最近的分析中，所得到的超伙伴质量，发现刚刚超出了大型强子对撞机运行1的范围，但完全在100 TeV pp对撞机的范围内。
The neutral Higgs boson predicted from spontaneous breaking of electroweak symmetry in the standard model (SM) has been discovered. Precision test of the Higgs boson properties is one of the promising ways to study new physics beyond SM. Some of the most important information to know is whether there are additional Higgs bosons, neutral, singly charged and even multi-charged ones. In this work, we study the potential to search for triply charged Higgs bosons in the final state with at least three same-sign leptons. A detailed collider analysis of the SM backgrounds and signals at a 100~TeV $pp…
There are many models beyond the standard model which include electroweakly interacting massive particles (EWIMPs), often in the context of the dark matter. In this paper, we study the indirect search of EWIMPs using a precise measurement of the Drell-Yan cross sections at future $100\,{\rm TeV}$ hadron colliders. It is revealed that this search strategy is suitable in particular for Higgsino and that the Higgsino mass up to about $1.3\,{\rm TeV}$ will be covered at $95\,\%$ C.L. irrespective of the chargino and neutralino mass difference. We also show that the study of the Drell-Yan process p…
Search for new physics via single top production at TeV energy $eγ$ colliders
我们研究了$ e γ$对撞机的灵敏度超出标准模型的物理，当这种相互作用是自然的，其规模低于对撞机的能量。使用反应$ e γ\to b t ν$作为一个具体的例子，我们表明，从标准模型的偏差可以参数化的模型独立的方式，只有3个数字。我们调查的敏感性，这3个数量的几个可观的，使用各种碰撞机偏振模式，以增加信噪比。然后将这些结果转化为从该反应中获得的对几个特定模型中存在的新物理效应的预期灵敏度。
In this study, we explore the detectability of heavy Higgs bosons in the $pp \to b\bar{b}H/A \to b\bar{b}t\bar{t}$ channel at a 100 TeV hadron collider within the semi-constrained Next-to-Minimal Supersymmetric Standard Model (NMSSM). We calculate their production cross sections and decay branching ratios, comparing these with simulation results from existing reference. We focus on the heavy, doublet-dominated CP-even Higgs $H$ and CP-odd Higgs $A$, with mass limits set below 10 TeV to ensure detectability. We find that at a collider with 3 ab$^{-1}$ of integrated luminosity, the potential for…
