Signatures for doubly-charged Higgsinos at colliders
Durmus A. Demir, Mariana Frank, Katri Huitu, Santosh Kumar Rai, Ismail Turan
几个具有扩展规范结构的超对称模型预言了轻的双电荷希格斯玻色子。通过研究它们的产生和衰变特征，突出了它们在大型强子对撞机上的独特特征。
Several supersymmetric models with extended gauge structures predict light doubly-charged Higgsinos. Their distinctive signature at the large hadron collider is highlighted by studying their production and decay characteristics.
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Doubly Charged Higgsinos at Tevatron
几个超对称模型与扩展规范结构，无论是大统一或中微子质量产生的动机，预测轻双电荷希格斯玻色子。在这项工作中，我们研究的信号双荷希格斯在Tevatron在两个对-和单-生产模式，并表明，它是可能的，特别是从事件包含相同的符号相同的味道孤立轻子，解开双荷希格斯在Tevatron数据的影响。
Supersymmetric Left-Right Model and Light Doubly Charged Higgs Bosons and Higgsinos
指出在一大类具有自动R宇称守恒的超对称左右模型中存在一对轻的双电荷希格斯玻色子玻色子和希格斯玻色子。要求这些粒子的质量满足LEP Z宽度界限意味着$W_R$的质量必须高于$10^{9}$ GeV。
Doubly Charged Higgsino Pair Production and Decays in e+e- Collisions
在超对称大统一理论中，除了标准模型的最小超对称扩展中常见的电荷伴子/中性伴子多重态外，还存在轻的希格斯诺多重态。新的多重态可以包括双电荷态$\tildeΔ^{\pm\pm}$和$\tildeδ^{\pm\pm}$。我们研究了在$e^+e^-$和$γγ$碰撞中这些新的希格斯介子的性质和产生通道，并探讨了如何从实验上分析它们的性质。
Single Production of Doubly Charged Higgsinos at linear e-e- colliders
几个扩展的超对称模型，无论是由大统一，或中微子质量产生的动机，预测轻双电荷希格斯玻色子。本文研究了在国际直线对撞机（ILC）e-e-模式下，单个双电荷希格西诺的产生及其衰变通道。我们分析了e-e->波浪线{Delta}^{--}_{L，R} chi ^{0 - 1}的产生截面随不同运动学变量的变化，以及双电荷希格希格希我们包括标准模型的背景，并讨论如何运动削减可以有效地用于限制这种背景。这些奇异物质的单独产生可以为一种新的潜在对称性和超越最小超对称标准模型的物理学提供一个壮观的信号。
Doubly charged Higgsino contribution to the decays mu-->e photon and mu-->3e and to the anomalous magnetic moment of the muon within the left-right supersymmetric model
在左右超对称模型下，详细计算了双荷希格斯诺对μ-> e光子和μ-> 3e衰变以及μ子反常磁矩的贡献.我们包括混合的标量合作伙伴的左手和右手轻子，并表明，它会导致一个强大的增强在某些情况下的衰变模式。我们发现，双电荷希格斯诺的贡献可以接近已知的实验值，并通过未来的实验可以达到。
Signals of Doubly-Charged Higgsinos at the CERN Large Hadron Collider
几个超对称模型与扩展规范结构，无论是大统一或中微子质量产生的动机，预测轻双电荷希格斯玻色子。在这项工作中，我们研究了存在于左右超对称模型中的双电荷希格斯玻色子的产生和衰变，并表明它们总是导致新的碰撞信号，这在最小超对称模型（MSSM）或由μ问题激发的任何扩展中都没有发现，甚至在额外的维理论中也没有发现。我们在大型强子对撞机（LHC）上以成对和单个产生模式研究了它们的独特特征，并表明它们是通过LHC实验测量确定底层模型的强大工具。
The signature at the Tevatron for the light doubly charged Higgsino of the supersymmetric left-right model
我们分析了具有规范介导超对称破缺的超对称左右模型的双荷希格斯超场在Tevatron上的信号。由于新耦合的存在，较轻的Stau通常比最轻的中性伴子质量小，通常是NLSP。双电荷希格斯场的费米子部分主要衰变为两个τ轻子加上丢失的能量（引力子）。我们发现，包容性的两个头喷流和三个头喷流加上丢失的能量签名可以观察到在运行II的Tevatron。我们还发现，来自同号τ轻子的两个最高E_T τ喷注之间的夹角分布可以用来区分该模型和其它模型。
We consider light higgsinos and singlinos in the next-to-minimal supersymmetric Standard Model at the Large Hadron Collider. We assume that the singlino is the lightest supersymmetric particle and that the higgsino is the next-to-lightest supersymmetric particle with the remaining supersymmetric particles in the multi-TeV range. This scenario, which is motivated by the flavor and CP issues, provides a phenomenologically viable dark matter candidate and improved electroweak fit consistent with the measured Higgs mass. Here, the higgsinos decay into on (off)-shell gauge boson and the singlino. W…
The search of the light Higgsino {in the Minimal Supersymmetric Standard Model (MSSM)} is a crucial test for the criteria of the naturalness in supersymmetry. On the other hand, the direct production of light Higgsino is also known as one of the most challenging SUSY searches at the current CERN Large Hadron collider (LHC). The lack of visible leptons due to the compressed spectrum and their small production rates limits their discovery potential in both mono-jet plus MET as well as the weak boson fusion (WBF) production. The signal $S/B$ ratio prediction is usually within the background syste…
Chasing higgsino dark matter at colliders in the neutrino fog era
在中微子雾时代通过碰撞机探测希格索诺暗物质，探索其通过更重超对称伙伴衰变产生的信号
A 100 TeV proton-proton collider will be an extremely effective way to probe the electroweak sector of the Minimal Supersymmetric Standard Model (MSSM). In this paper, we describe a search strategy for discovering pair-produced Higgsino-like next-to-lightest supersymmetric particles (NLSPs) at a 100 TeV hadron collider that decay to Bino-like lightest supersymmetric particle (LSP) via intermediate Z and SM Higgs boson that in turn decay to a pair of leptons and a pair of b-quarks respectively: $\widetilde{N}_2^0\widetilde{N}_3^0 \rightarrow (Z\widetilde{N}_1^0)(h\widetilde{N}_1^0)\rightarrow b…
Looking for a Heavy Higgsino LSP in Collider and Dark Matter Experiments
mSUGRA参数空间的很大一部分满足WMAP约束的暗物质遗迹密度对应于一个higgsino LSP的质量$\simeq 1$ TeV。我们发现一个有前途的信号，这种LSP在CLIC，特别是与极化电子和正电子束。人们还期望一个可行的单色$γ$射线信号，从其对湮灭在银河系中心，至少为尖形DM晕配置文件。所有这些结果同样适用于higgsino LSP的其他超对称模型，如非普适标量或gaugino质量模型和所谓的倒置层次和更小的超对称模型。
Dark Matter Constraints on Gaugino/Higgsino Masses in Split Supersymmetry and Their Implications at Colliders
在分裂超对称中，高吉诺和希格斯诺是唯一可能在可预见的对撞机上获得的超对称粒子。虽然直接的实验研究，如LEP和Tevatron实验，给出了这些粒子质量的可靠下限，但宇宙暗物质可以给出一些上限，因此对未来对撞机的研究具有重要意义。在这项工作中，我们仔细检查这样的暗物质的限制，并显示允许的质量范围为charginos和neutralinos（质量本征态的高吉诺和希格斯诺斯）。我们发现，最轻的电荷子在一般假设M_1=M_2/2下必须轻于1 TeV，在其它情况下必须轻于2或3 TeV。还显示了欧洲核子研究中心大型强子对撞机（LHC）和国际线性对撞机（ILC）上最轻电荷ino的相应产生率。虽然在允许区域的某些部分，电荷对的产生率可以在LHC上大于1 pb，在ILC上大于100 fb，但该区域的其他部分对应于非常小的产生率，因此不能保证在未来的对撞机上找到分裂超对称的电荷对。
The mono-photon signature emerging in an E6 Supersymmetric Standard Model (E6SSM) from inert higgsino Dark Matter (DM) is analyzed at future $e^+e^-$ colliders. As the inert neutral and charged higgsinos are nearly degenerate, the inert chargino is a rather long lived particle and the charged particle associated with its decay to the inert higgsino is quite soft. We show that the pair production of inert charginos at a 500 GeV electron-positron collider with an initial or final state photon is the most promising channel for probing the inert higgsino as one DM candidate within the E6SSM. We al…
From LUX-ZEPLIN to Colliders: Probing Higgsino Dark Matter
针对LZ实验观测到的248 keV核反冲事件，提出1.1 TeV Higgsino非弹性暗物质模型，预言chargino质量劈裂约350 MeV，产生亚厘米级短径迹，可在未来对撞机检验。
SUSY Search in Future Collider and Dark Matter Experiments
MSSM中最轻的超粒子预计是Bino，Higgsino或Wino。我们认为暗物质丰度约束这些LSP的最小SUGRA和AMSB模型的情况下。我们讨论了由此产生的对撞机信号的比诺LSP在LHC和希格斯诺和维诺LSP在CLIC。对暗物质实验中的Bino、Higgsino和Wino LSP信号也作了简要的讨论。最后，我们讨论这些LSP的情况下，非最小超对称模型。
Higgsino Cold Dark Matter Motivated by Collider Data
受CDF eeγγ +缺失能量事件的超对称解释和LEP处Z->bb过剩的报道的启发，我们分析了Higgsino作为冷暗物质的候选者。我们检查的约束所暗示的对撞机实验，然后计算其遗迹密度。我们发现这种最轻的超对称粒子是一种可行的冷暗物质候选者（0.05 <Ω h^2 < 1），并讨论了它在实验室探测中的良好前景。
Several extensions of the Standard Model have light doubly-charged Higgs bosons in their particle spectrum. The supersymmetric versions of these models introduce fermionic superpartners of these doubly-charged Higgs bosons, the Higgsinos, which also remain light. In this work we analyze a new collider signal resulting from the pair production and decay of a light doubly-charged Higgsino to an even lighter doubly-charged Higgs boson. We focus on the minimal left-right supersymmetric model with automatic R-parity conservation, which predicts such a light doubly-charged Higgs boson and its Higgsi…
Radiatively-driven natural supersymmetry, a theoretically and experimentally well-motivated framework, centers around the predicted existence of four light, nearly mass-degenerate Higgsinos with mass $\sim 100-200$ GeV (not too far above $m_Z$). The small mass splittings amongst the higgsinos, typically 4-20 GeV, results in very little visible energy arising from decays of the heavier higgsinos. Given that other SUSY particles are considerably heavy, this makes detection challenging at hadron colliders. On the other hand, the clean environment of an electron-positron collider with $\sqrt{s}>2m…
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…
Electroweak Precision Data as a Gateway to Light Higgsinos
研究未来正负电子对撞机中通过电弱精确测量探测弱尺度Higgsino的方法，证明质量高达约500 GeV的Higgsino可被探测，为弱尺度超对称性研究提供重要途径。
A core prediction of natural Supersymmetry is the existence of four light higgsinos not too far above the mass of the $Z$ boson. The small mass splittings amongst the higgsinos -- typically 5-20\,GeV -- imply very little visible energy release from decays of heavier higgsinos. In particular, if other SUSY particles are quite heavy, as can be the case in SUSY with radiatively-driven naturalness, the higgsinos are extremely hard to detect at hadron colliders. The clean environment of electron-positron colliders with $\sqrt{s} > 2m_{\mathrm{higgsino}}$, however, would allow for a decisive search …
Mixed Higgsino Dark Matter from a Reduced SU(3) Gaugino Mass: Consequences for Dark Matter and Collider Searches
在引力介导的超对称破缺模型中，降低SU（3）的质量|M_3|会导致夸克和胶子质量的减少。第三代夸克的质量越低，在希格斯质量参数m_{H_u} ^[2]的作用下，大的顶夸克汤川耦合的影响就越小，从而导致超势μ参数的大小减小（相对于M_1和M_2）。低|亩|混合希格西诺暗物质（MHDM）在早期宇宙中可以有效地湮灭，从而得到与WMAP测量一致的暗物质残余密度。我们探讨的现象学的低|M_3|的情况下，并发现的情况下，MHDM的中性伴子暗物质的直接和间接检测的mSUGRA模型的增加率。超粒子的质谱以相对较轻的胶子为特征，通常m（gl）<<m（sq）。如果标量质量很大，那么胶子可以很轻，其中gl->Z_i+g环衰变占主导地位。顶部方形可以比底部和第一/第二代方形轻得多。在CERN LHC中预期会有低质量的类希格斯诺电荷伴子和中性伴子存在。较小的m（Z2）-m（Z1）质量间隙应该会产生可见的反号/同味双轻子质量边缘。在TeV量级的线性e^+e^-对撞机上，MHDM区域意味着电荷伴子和中性伴子的整个光谱都属于最轻的超粒子，并且最有可能以可观测的速率产生，从而可以完全重建高吉诺-希格西诺区。
Higgsino in supersymmetric standard models is known to be a promising candidate for dark matter in the Universe. Its phenomenological property is strongly affected by the gaugino fraction in the Higgsino-like state. If this is sizable, in other words, if gaugino masses are less than ${\cal O}(10)$ TeV, we may probe the Higgsino dark matter in future non-accelerator experiments such as dark matter direct searches and measurements of electric dipole moments. On the other hand, if gauginos are much heavier, then it is hard to search for Higgsino in these experiments. In this case, due to a lack o…
We provide a simple solution to the $μ$-$B_μ$ problem in the "$R$-invariant direct gauge mediation model". With the solution, the Higgsino and gluino are predicted to be light as $\mathcal{O}(100)$GeV and $\mathcal{O}(1)$TeV, respectively. Those gluino and Higgsino can be accessible at the LHC and future collider experiments. Moreover, dangerous dimension five operators inducing rapid proton decays are naturally suppressed by the $R$-symmetry.
Within the theory of supersymmetry, the lightest neutralino is a dark matter candidate and is often assumed to be the lightest supersymmetric particle (LSP) as well. If the neutral wino or higgsino is dark matter, the upper limit of the LSP mass is determined by the observed relic density of dark matter. If the LSP is a nearly-pure neutral state of the wino or higgsino, the lightest chargino state is expected to have a significant lifetime due to a tiny mass difference between the LSP and the chargino. This article presents discovery potential of the 100 TeV future circular hadron collider (FC…
While the SUSY flavor, CP and gravitino problems seem to favor a very heavy spectrum of matter scalars, fine-tuning in the electroweak sector prefers low values of superpotential mass μ. In the limit of low μ, the two lightest neutralinos and light chargino are higgsino-like. The light charginos and neutralinos may have large production cross sections at LHC, but since they are nearly mass degenerate, there is only small energy release in three-body sparticle decays. Possible dilepton and trilepton signatures are difficult to observe after mild cuts due to the very soft p_T spectrum of the fin…
Virtual Effects of Split SUSY in Higgs Productions at Linear Colliders
在分裂超对称中，高金诺和希格斯诺是唯一可能在可预见的对撞机上获得的超对称粒子，如欧洲核子研究中心的大型强子对撞机（LHC）和国际线性对撞机（ILC）。为了解释WMAP测量的宇宙暗物质，这些高吉诺和希格斯诺被严格限制，并可以通过它们的直接产生和/或在某些过程中的虚拟效应在对撞机上进行探索。ILC的洁净环境和高亮度使得百分比级的虚拟效应对揭示新的物理效应有意义。本文假设分裂超对称性，计算了在ILC条件下WW核聚变产生的Higgs产物e+e- -> Zh和e+e- -> v_e \bar_ν_e h中，WMAP允许的高吉诺和希格西诺的虚效应。我们发现，在WMAP允许的参数空间中，e+e- -> Zh的产生截面可以被改变几个百分点，而对WW-fusion过程e+e- -> v_e \bar_ν_e h的修正小于1%。这种虚效应与电荷对产生的截面相关，可以为探测对撞机上的分裂超对称性提供补充信息。
We investigate the sensitivity at current and future hadron colliders to a heavy electrically-charged particle with a proper decay length below a centimetre, whose decay products are invisible due to below-threshold energies and/or small couplings to the Standard Model. A cosmologically-motivated example of a framework that contains such a particle is the Minimal Supersymmetric Standard Model in the limit of pure Higgsinos. The current hadron-collider search strategy has no sensitivity to the upper range of pure Higgsino masses that are consistent with the thermal relic density, even at a futu…
Hunting wino and higgsino dark matter at the muon collider with disappearing tracks
本文提出利用击中时间与关联抑制缪子对撞机 BIB，并通过消失径迹切槽计数分析，证明 10 TeV 机器可探测热 MSSM wino 与 higgsino 暗物质。
Supersymmetric models with nearly-degenerate light higgsinos provide a consistent solution to the naturalness problem under rigorous constraints from current experimental searches for sparticles. However, it is challenging to probe the compressed scenarios at collider experiments due to the hard-to-detect soft final states. To overcome this issue, strategies have been proposed to take advantage of the photon fusion along the ultraperipheral collision at the Large Hadron Collider, which are feasible with the forward detectors installed at the ATLAS and CMS detectors. In this paper, we demonstra…
Doubly heavy baryon production at polarized photon collider
研究了在极化光子对撞机上双重重子$Ξ_{cc}$的包容产生。我们的研究结果表明，适当选择的初始光束偏振可以提高生产率的$Ξ_{cc}$约10%。
Indirect Detection of a Light Higgsino Motivated by Collider Data
凯恩和威尔斯最近认为，对撞机的数据指向一个类似希格斯诺的最轻的超对称伙伴，这将解释我们星系晕中的暗物质。他们讨论了在实验室探测器中直接探测这种暗物质粒子。在这里，我们认为，这样的粒子，如果它确实是暗物质，也可以在实验中寻找高能中微子从太阳中的暗物质湮灭。我们提供了准确的分析估计率，考虑到所有相关的物理效应。目前，预测的信号大约比实验范围低一到三个数量级，这取决于粒子的质量和耦合;然而，像MACRO、超级神冈和AMANDA这样的探测器将继续采集数据，并且应该能够在未来五年内排除或确认这种暗物质粒子可能质量范围的一个有趣部分。
In the framework of diquark model for production we discuss the yields and observation prospects for excited states of doubly heavy baryons at LHC kinematic conditions.
Probing doubly charged Higgs in $e^+ e^-$ Colliders in 3-3-1 Model
SU（3）$_L\otimesU(1)_N$电弱模型预言了新的希格斯玻色子，它超越了标准模型.在这项工作中，我们调查的签名和生产的双荷希格斯玻色子在$e^-e^+$国际直线对撞机和欧洲核子研究中心直线对撞机。我们计算了模型中双荷规范玻色子的分支比。
Reach of e^+e^- Higgs factory for light higgsinos via electroweak precision observables and comparison with other future facilities
本文研究 e^+e^- 希格斯工厂如何通过电弱精确观测量间接探测轻 higgsino，并利用 higgsino 发现平面比较其与 LHC、高亮度 LHC 及 0.5 TeV 直线对撞机的探测能力。
Associated single photons and doubly charged scalar at linear e-e- colliders
在许多具有奇异希格斯表象的模型中预测的双电荷标量，通常可以具有轻子数破坏（LFV）耦合。我们表明，通过使用相关的单能末态光子看到在未来的线性电子对撞机，我们可以有一个明确的和独特的双电荷共振的签名。Δ L=2耦合的强度也可以作为双电荷标量的反冲质量的函数而被非常有效地探测。
We show that the electroweak fine-tuning parameter Δ_{\rm EW} derived from the well-known electroweak symmetry breaking condition written in terms of weak scale parameters leads to {\it a bound on fine-tuning in the MSSM} and explain its utility for phenomenological analyses. We argue that a small magnitude of the mu parameter, and the concomitant presence of light higgsinos, is the most basic consequence of naturalness in SUSY models, and list the resulting implications of this for experiments at the LHC and at future e^+e^- colliders.
Production of Doubly Charged Higgs Bosons at Linear e-e- Colliders
考虑初态辐射（ISR）、束致辐射（ISR + BS）、末态辐射（FSR）和探测器拖尾效应，研究了在未来直线对撞机能量下通过s沟道过程e-e-> H-> l-l-产生双电荷希格斯玻色子.给出了双荷希格斯玻色子中轻子味守恒耦合和轻子味破坏耦合的发现界。研究发现，未来的线性对撞机具有质心能量，能够探测对角耦合分别为10^-4和10^-3的双电荷希格斯玻色子。
We show how the material used in direct detection experiments of Dark Matter (DM), in the presence of a signal of it, can afford one with the possibility of extracting the nature of the underlying candidate. We do so for the case of a $U(1)'$ Supersymmetric Standard Model (USSM) of E$_6$ origin, by exploiting benchmark points over its parameter space that yield either a Singlino- or Higgsino-like neutralino as DM candidate, the latter being defined in presence of up-to-date constraints, from low to high energy and from collider to non-collider experiments. However, as our method is general, we…
Investigating higgsino dark matter in the semi-constrained NMSSM
本研究在半约束NMSSM框架下分析了higgsino型暗物质的参数空间与湮灭机制，评估了未来直接/间接探测实验及直线对撞机对不同质量区间暗物质样本的探测潜力。
There are many extensions of the standard model that predict the existence of electroweakly interacting massive particles (EWIMPs), in particular in the context of the dark matter. In this paper, we provide a way for indirectly studying EWIMPs through the precise study of the pair production processes of charged leptons or that of a charged lepton and a neutrino at future 100 TeV collider experiments. It is revealed that this search method is suitable in particular for Higgsino, providing us the $5σ$ discovery reach of Higgsino in supersymmetric model with mass up to 850 GeV. We also discuss h…
The LHC inverse problem is infamously challenging when neutralinos and charginos are heavy and pure and other superparticles are decoupled. This limit is becoming more relevant to particle physics nowadays. Fortunately, in this limit, Higgsinos produce a distinctive signature if they are the LSPs or NLSPs. The identifying signature is the presence of equal numbers of Z bosons and Higgs bosons in NLSP productions and subsequent decays at hadron colliders. The signature is derived from the Goldstone equivalence theorem by which partial widths into Z and Higgs bosons are inherently related and fr…
Constraints on doubly charged Higgs interactions at linear collider
本文研究了在直线对撞机的极化$e^+e^-$和极化$e^+γ$碰撞模式中产生单个双电荷希格斯玻色子$Delta^{--}$。待探测的$Delta^{--}$的质量范围延伸至碰撞能量。对角轻子数违反汤川耦合$h_{ee}$将测试至少三个数量级更严格地比在目前的实验。
In the Minimal Supersymmetric Standard Model, the higgsinos can have masses around the electroweak scale, while the other supersymmetric particles have TeV-scale masses. This happens in models of gauge-mediated SUSY breaking with a high messenger scale, which are motivated from string theory. For particular choices of the messenger field content, multi-TeV squark and gluino masses naturally lead to a much lower electroweak scale, somewhat similar to focus point supersymmetry. They also induce Higgs masses of 124-126 GeV, while making the discovery of supersymmetry at the LHC unlikely. The ligh…
The hMSSM with a Light Gaugino/Higgsino Sector: Implications for Collider and Astroparticle Physics
本文研究 LHC 数据允许的轻规范子/希格斯微子扇区对 hMSSM 的影响，分析其对希格斯质量与耦合的辐射修正、对撞机唯象及暗物质遗迹丰度约束，证明该场景仍可实现。
The Higgs sector of the standard model can be extended by introducing an $SU(2)_L$ Higgs triplet $Δ$ to generate the tiny neutrino masses in the framework of type-II seesaw mechanism. In this paper, we study the pair production of the introduced Higgs triplet at future $e^{-}p$ colliders. The corresponding production cross sections via vector boson fusion process at FCC-ep and ILC$\otimes$FCC are predicted, where the production of a pair of doubly charged Higgs is found to be dominant and then used to investigate the collider phenomenology of the Higgs triplet. Depending on the size of the Hig…
New Limits on Doubly Charged Bileptons from CERN LEP Data and the Search at Future Electron-Positron and Electron-Photon Colliders
我们发现，累积的LEP-II数据在$\sqrt{s} =$ 130至206 GeV的双电荷双轻子耦合和质量比任何其他实验到目前为止，可以建立更多的限制性界限。我们还分析了一个前瞻性的线性对撞机运行在$e^+ e^-$和$e γ$模式的发现潜力。
Production of the doubly heavy-flavored hadrons ($B_c$ meson, doubly heavy baryons $Ξ_{cc}$, $Ξ_{bc}$, $Ξ_{bb}$, their excited states and antiparticles of them as well) at $e^+e^-$ colliders is investigated under two different approaches: $LO$ (leading order QCD complete calculation) and $LL$ (leading logarithm fragmentation calculation). The results for the production obtained by the approaches $LO$ and $LL$, including the angle distributions of the produced hadrons with unpolarized and polarized incoming beams, the behaviors on the energy fraction of the produced doubly heavy hadron and comp…
A Note on Doubly-Charged Higgs Pair Production at Hadron Colliders
我们分析了在扩展的SM与Higgs的同位旋三重态下，在强子对撞机上产生双电荷Higgs粒子的次领先阶QCD修正。在Tevatron和LHC上，发现这些修正在大小上是中等的，使截面增加约20- 30%。剩余的理论不确定性是10- 15%的顺序，这是足够的实验研究这些粒子在Tevatron和LHC。
We discuss the production of the doubly charged leptons in future linear electron positron colliders, such as the International Linear Collider and Compact Linear Collider. Such states are introduced in extended weak-isospin multiplets by composite models. We discuss the production cross section of $e^-γ\rightarrow L^{--}W^{+}$ and carry out analyses for hadronic, semi-leptonic and pure leptonic channels based on the full simulation performance of the Silicon Detector. The 3- and 5-sigma statistical significance exclusion curves are provided in the model parameter space. It is found that the h…
We study the scenario of higgsino dark matter in the context of a non-standard cosmology with a period of matter-domination prior to Big-Bang nucleosynthesis. Matter-domination changes the dark matter relic abundance if it ends via reheating to a temperature below the higgsino thermal freeze-out temperature. We perform a model independent analysis of the higgsino dark matter production in such scenario. We show that light higgsino-type dark matter is possible for reheating temperatures close to 1 GeV. We study the impact of dark matter indirect detection and collider physics in this context. W…
Disentangling fundamental MSSM Parameters: Light Gaugino/Higgsino System
为了揭示超对称性的基本结构，我们必须在不假设特定超对称破缺方案的情况下确定低能参数。本文给出了在未来直线对撞机的第一级中，当只有光荷伴子\tilde χ^{ \pm }_1和中性伴子\tilde χ^0_1，\tilde χ ^0_2时，如何确定M_1，Φ_{M_1}，M_2，μ，Φ_μ和\tan β的方法。
Testing a U(1) Solution to the Mu Problem
我们讨论了TeV Z'规范玻色子的对撞机现象与超势中裸μ项的缺乏有关。Z' --> Higgsinos型衰变可以直接检验规范对称性是否是阻止Higgsinos质量的原因。多轻子末态的衰变可能使这些特征在大型强子对撞机上被观察到。我们评论是否有可能明确地说，μ项是禁止通过规范对称性。
Realistic search for doubly charged bileptons at linear $e^{-}e^{-}$ collider energies
通过考虑初态和终态电磁辐射修正（ISR，FSR），我们在线性对撞机能量下通过$ \text{e}^{-}\text{e}^{-}\to μ^{-}μ^{-}$和$ \text{e}^{-}\text{e}^{-}\to \text{e}^{-}\text{e}^{-}$过程寻找双电荷标量双轻子.此外，模糊截面用于有限能量分辨率。我们发现，由于双轻子的衰减宽度很窄，ISR+FSR和拖尾效应显著地减小了双轻子的截面。我们得到现实的发现轮廓的耦合和质量的轻子味保存和违反过程。
In this work we investigate the production and signatures of doubly-charged particles at the Large Hadron Collider. We start with the Standard Model particle content and representations and add generic doubly-charged exotic particles. We classify these doubly-charged states according to their spin, considering scalar, fermionic and vectorial fields, and according to their SU(2)L representation, being chosen to be either trivial, fundamental, or adjoint. We write the most general interactions between them and the Standard Model sector and study their production modes and possible decay channels…
Investigating the leptonic couplings of doubly charged scalars at the muon collider
本研究在mu子对撞机中探讨双电荷标量与轻子的耦合，通过分析电子、mu子和tau子的最终状态，发现质量大于1 TeV且耦合强度为一阶的标量可实现高信号显著性，并提出角分布变量区分标量交换情况。
Single production of doubly charged Higgs bosons at hadron colliders
在左右对称模型和Higgs三重态模型的框架下，我们重新考虑了双电荷希格斯玻色子Delta_R^{++}和Delta_L^{++}在LHC和TEVATRON上的单次产生.我们证明了在左右对称模型中，Drell-Yan过程通过W_R交换产生的Delta_R^{++}可能是主要的贡献.在Higgs三重态模型中，Delta_L^{++}产生的相同通道是不重要的。
Associated single photons as signals for a doubly charged scalar at linear e-e- colliders
在许多具有奇异希格斯表象的模型中预测的双电荷标量，通常可以具有轻子数破坏（LFV）耦合。对这种带电标量的大多数研究的基础是寻找它的直接产生及其随后衰变为同号末态轻子。在这项工作中，我们表明，通过使用在未来的线性电子对撞机上看到的相关单能末态光子，我们可以有一个清晰而独特的双电荷共振信号，并相当精确地确定其质量。我们还估计的三角洲L=2耦合，可以在这种方式在sqrt{s}=1 TeV的探测的强度，作为双电荷标量的反冲质量的函数。
Searching for doubly charged Higgs bosons in Möller scattering by resonance effects at linear $e^-e^-$ collider
讨论了在国际直线对撞机（ILC）上，双荷Higgs玻色子在$SU(2)_L$三重态和单重态标量玻色子模型中引起的Möller散射中的宇称违反的左右不对称性（LRA），其中三重态玻色子分别与左手荷轻子和右手荷轻子耦合.这些玻色子在产生中微子质量的场景中很重要。我们证明了三重态玻色子和单重态玻色子对LRA的贡献是相反的。特别是，我们表明，双电荷的希格斯玻色子从单重标量可以测试在ILC通过使用共振效应。
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