Diagnosing Degenerate Higgs Bosons at 125 GeV
John F. Gunion, Yun Jiang, Sabine Kraml
我们开发的诊断工具，将提供无可争议的证据，在LHC数据中的125 GeV附近的一个以上的希格斯玻色子玻色子的存在。
We develop diagnostic tools that would provide incontrovertible evidence for the presence of more than one Higgs boson near 125 GeV in the LHC data.
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Diagnosing CP properties of the 2HDM
我们研究了一个双Higgs-Doublet模型（2 HDM），重点研究了CP破坏。已经考虑了各种情况下自发和明确打破CP。讨论和澄清了与两个Higgs二重态基的选择有关的CP破坏的一些特征。在物理参数空间中对应于自发和显式CP破坏的区域已被定位和讨论。考虑了在不考虑汤川耦合的情况下确定标量势参数的可能性，发现了不可避免的模糊性。研究了解开自发和显式CP破坏的问题。
The observed Higgs boson signals to-date could be due to having two quasi-degenerate 125 GeV scalar states in Nature. This kind of scenario tallies well with the predictions from the Next-to-Minimal Supersymmetric Standard Model (NMSSM). We have analysed the phenomenological NMSSM Higgs boson couplings and derived a parameterization of the signal strengths within the two quasi-degenerate framework. With essentially two parameters, it is shown that the combined strengths of the two quasi-degenerate Higgs states in the leptonic (and b-quark) decay channels depart from the Standard Model values i…
On SUSY GUTs with a degenerate Higgs mass matrix
某些超对称大统一模型预言MSSM希格斯势的二次项系数在大统一尺度下应该是简并的。我们讨论了一些这样的模型的例子，我们分析了这种特殊的条件下的大统一体尺度简并希格斯质量矩阵的低尺度MSSM现象的影响。为此，我们探索的参数空间，这是符合现有的实验约束通过马尔可夫链蒙特卡罗分析。
Ultralight Dirac neutrinos from nearly degenerate Higgs doublets
本文提出一种基于镜像对称性自发破缺的近简并Higgs双重态模型，通过新引入的右手中微子奇变换，使中微子质量正比于Higgs双重态真空期望值之差，从而实现超轻Dirac中微子，其等效于高抑制的Dirac跷跷板机制。
s-Channel Production of MSSM Higgs Bosons at a Muon Collider with Explicit CP Violation
具有可控能量分辨率和横向束偏振的μ子对撞机通过s通道产生希格斯玻色子，提供了一个强有力的探测具有明确CP破坏的最小超对称标准模型中的希格斯扇区。产生率和CP-偶和CP-奇横向极化不对称性在诊断希格斯扇区的CP破坏中是互补的。
Mass-degenerate Higgs bosons at 125 GeV in the Two-Higgs-Doublet Model
ATLAS和CMS合作组对希格斯玻色子数据的分析显示，h --> gammaγ事件超出了标准模型（SM）的预期;而在h --> ZZ* --> {四轻子}事件中没有观察到显著的过量，尽管由于数据样本小而具有很大的统计不确定性。这些结果（假设它们在进一步的数据中仍然存在）可以用一对几乎质量简并的标量来解释，其中一个是类SM的希格斯玻色子玻色子，另一个是与W+W-和ZZ的耦合被抑制的标量。在双Higgs模型中，当\sin（β-α）接近1且0.7 < \tan β< 1时，观测到的γγ和ZZ* -> {四轻子}数据可以用近似简并的CP-偶（h）和CP-奇（A）希格斯玻色子再现。当m_h ~ m_H、m_H ~ m_A或m_h ~ m_H ~ m_A时，γγ信号也会增强。由于ZZ* --> {四轻子}信号主要来自于类SM的希格斯玻色子，而γγ信号则来自于两个（或更多个）几乎质量简并的态，因此我们可以预期ZZ* --> {四轻子}和γγ通道中的不变质量峰略有不同。这些模型的现象学结果可以用LHC在不久的将来收集的额外希格斯数据来测试。
Disentangling CP phases in nearly degenerate resonances: neutralino production via Higgs at a muon collider
在CP破坏的最小超对称标准模型中，我们研究了在重中性希格斯玻色子玻色子共振附近质心能量下中性伴子对的产生。对于纵向极化的μ子光束，我们分析了CP不对称性，它对两个重中性希格斯玻色子玻色子的干涉很敏感。由于辐射诱导的纯量-伪纯量跃迁，当共振接近简并时，CP不对称性会被强烈增强，例如在希格斯脱耦合极限中。希格斯耦合到中性伴子部门，然后可以分析在CP违反阶段的存在。我们提出了详细的数值分析的截面，中性伴子分支比，和CP观测值。我们发现，辐射诱导的CP破坏在希格斯部门导致相当大的CP不对称性，这是在未来的测量在μ子对撞机。然而，我们希望我们提出的方法应该适用于其他过程与近简并标量共振，即使在强子对撞机。
We discuss a scenario of the type-II 2HDM in which the $b\bar{b}γγ$ rate of the Higgs pair production is enhanced due to the two nearly degenerate 125 GeV Higgs bosons ($h$, $H$). Considering various theoretical and experimental constraints, we figure out the allowed ranges of the trilinear couplings of these two Higgs bosons and calculate the signal rate of $b\bar{b}γγ$ from the productions of Higgs pairs ($hh$, $hH$, $HH$) at the LHC. We find that in the allowed parameter space some trilinear Higgs couplings can be larger than the SM value by an order and the production rate of $b\bar{b}γγ$ …
Fixed point scenario in the Two Higgs Doublet Model inspired by degenerate vacua
本文考虑了标准模型中最简单的非超对称双Higgs二重态扩展中Higgs和Yukawa耦合的重整化群流。在这个模型中的耦合进行调整，使多点原理（MPP）的假设，这意味着存在一个大的集合的退化真空在一些高能量尺度$Λ$，实现。在$Λ$尺度上，当顶夸克汤川耦合较大时，在MPP启发的2HDM模型中，RG方程的解收敛到准不动点.我们分析了希格斯谱和耦合在准不动点的情况下，并计算了最轻的希格斯玻色子玻色子质量的理论上限。当尺度$Λ$较低时，类SM希格斯标量与顶夸克的耦合在所考虑的模型中可以明显大于SM，从而导致LHC中希格斯玻色子的产生增强。
Degenerate scalar scenario of two Higgs doublet model with a complex singlet scalar
本研究提出双希格斯二重态模型加复单态标量的简并标量场景，使暗物质散射受抑，实现强一阶电弱相变，并给出可检验的三线性耦合偏移。
More than one Higgs boson may be present near the currently discovered Higgs mass, which can not be properly resolved due to the limitations in the intrinsic energy resolution at the Large Hadron Collider. We investigated the scenarios where two $CP$-even Higgs bosons are degenerate in mass. To correctly predict the Higgs signatures, quantum interference effects between the two Higgs bosons must be taken into account, which, however, has been often neglected in the literature. We carried out a global analysis including the interference effects for a variety of Higgs searching channels at the L…
Using the most recent results of CMS and ATLAS, we study the Higgs decays to $γγ$ and $Zγ$ in the scenario where the two CP even Higgs predicted by the type II seesaw model (HTM) are close to mass degenerate with a mass near $125$ GeV. We analyse the effects of the Higgs potential parameters constrained by the full set of perturbative unitarity, boundedness from below (BFB) as well as from precision electroweak measurements on these decay modes. Our analysis demonstrates that the observed excess in the diphoton Higgs decay channel can be interpreted in our scenario within a delineated region c…
How to test for mass degenerate Higgs resonances
在大型强子对撞机上观察到的类似希格斯的信号可能是由于几个质量简并共振。我们发现共振的数目与“产生和衰变”矩阵$R_{if}$的秩有关。该矩阵中的每个条目包含在特定生产模式$i$和最终状态$f$下观察到的速率。在$N$非干扰共振的情况下，$R$的秩最多为$N$。如果干扰起作用，则最大秩是$N^2$或在CP限制$N(N+1)/2$中。作为一个例子，我们使用目前的实验数据来约束相应矩阵的秩。我们估计LHC达到探测两个和三个共振下对未来的测量和不确定性的各种猜测。
Using the likelihood ratio test statistic, we present a method which can be employed to test the hypothesis of a single Higgs boson using the matrix of measured signal strengths. This method can be applied in the presence of incomplete data and takes into account uncertainties on the measurements. The p-value against the hypothesis of a single Higgs boson is defined from the expected distribution of the test statistic, generated using pseudo-experiments. The applicability of the likelihood-based test is demonstrated using numerical examples with uncertainties and missing matrix elements.
The scenario of two mass-degenerate Higgs bosons within the general two-Higgs-doublet model (2HDM) is revisited. We focus on the global picture when two $CP$-even Higgs bosons of $h$ and $H$ are nearly mass-degenerate. A global fit to the signal strength of the 125 GeV Higgs measured at the LHC is performed. Based on the best-fit result of the 2HDM mixing angles $(α,β)$, theoretical constraints, charged and $CP$-odd Higgs boson direct search constraints and the electroweak precision constraints are imposed to the 2HDM parameter space. We present the signal predictions of the $(4b\,, 2b\,2γ)$ c…
Two Higgs doublet model with a complex singlet scalar and Multi-critical Point Principle
本文研究了一个扩展了复单态标量的双双态模型，其中单态的虚部作为暗物质候选者。该模型中，三种中性希格斯玻色子的退化质量对于满足当前暗物质直接探测实验和希格斯搜索的约束至关重要。通过引入树级多点原理（MPP），分析其对标量势、暗物质现象学和电弱相变的影响，展示了树级MPP倾向于大SU(2)_L双态-单态混合参数，但仍然存在可行的参数区域以满足观测暗物质约束。此外，尽管树级MPP禁止了由树级驱动的一阶电弱相变，但通过热环效应可以诱导出强的一阶相变，与电弱原初恒星形成相容。
We investigate rare decays of Higgs via exchange of two almost degenerate heavy on-shell Majorana neutrinos $N_j$ ($j=1,2$): $Γ_{\pm} = Γ(h \to ν_k N_j \to ν_k \ell^{\pm} π^{\mp})$, and into the open quark channels $Γ_{\pm} = Γ(h \to ν_k N_j \to ν_k \ell^{\pm} U D)$, where $U D$ are two jets of open quarks (${\bar U} D$, or $U {\bar D}$, where $U=u, c$ and $D=d, s$). The related CP violation asymmetry $A_{\rm CP} = (Γ_{-} - Γ_{+})/(Γ_{-} + Γ_{+})$ is studied in detail. We take into account the $N_1$-$N_2$ overlap and oscillation effects. We can see that for certain, presently acceptable, range…
Radiative seesaw and degenerate neutrinos
Witten的辐射跷跷板机制在16_HHiggs旋量场作用下产生SO（10）中的右手中微子质量。本文研究了含有10_H和120_H Higgs表象的最小Yukawa结构的第二代和第三代解析解。在小的第二代质量和规范圈支配的近似下，我们得到了下列结果：（1）b-tau统一，（2）大θ_l和小θ_q的自然共存，（3）简并中微子。
We chose the $μ$-term extended next-to-minimal supersymmetric standard model ($μ$NMSSM) for this work, and the phenomenological research is based on the assumption of double Higgs resonance state as the Standard Model (SM)-like Higgs considering the recent $(g-2)_μ$ result. The study also take into account a variety of experimental results, including direct detection of dark matter (DM) and searching results for sparticles at the Large Hadron Collider (LHC). We study the characteristic of DM confronted with limitations of direct detection experiments. Following that, we concentrate on the prop…
The presence of two light higgsinos nearly degenerate in mass is one of the important characteristics of suspersymmetric models meeting the naturalness criteria. Probing such higgsinos at the LHC is very challenging, in particular when the mass-splitting between them is less than 5 GeV. In this study, we analyze such a degenerate higgsino scenario by exploiting the high collinearity between the two muons which originate from the decay of the heavier higgsino into the lighter one and which are accompanied by a high-$p_T$ QCD jet. Using our method, we can achieve a statistical significance $\sim…
We propose a noncommutative (NC) version for a global O(2) scalar field theory, whose damping feature is introduced into the scalar field theory through the NC parameter. In this context, we investigate how noncommutative drives spontaneous symmetry breaking (SSB) and Higgs-Kibble mechanisms and how the damping feature workout. Indeed, we show that the noncommutativity plays an important role in such mechanisms, i.e., the Higgs mass and VEV dependent on NC parameter. After that, it is explored the consequences of noncommutativity dependence of Higgs mass and VEV: for the first, it is shown tha…
Degenerate Dirac Neutrinos In An ${SU(2)}_L\times {U(1)}_Y$ Model With $S_3\times Z_3\times Z_4$ Discrete Symmetry
我们证明了在具有$S_3\times Z_3\times Z_4$离散对称性和适当的Higgs场的${SU(2)}_L\times {U(1)}_Y$模型中，可以得到质量为几eV、跃迁磁矩为${10}^{-11}$ $μ_B$量级的几乎简并的Dirac中微子.狄拉克中微子的磁矩跃迁是由轻子和带电希格斯场在单圈能级上的贡献引起的。
We propose a new search strategy for higgsinos. Assuming associated production of higgsino-like pairs with a $W$ or $Z$ boson, we search in the missing energy plus hadronically-tagged vector boson channel. We place sensitivity limits for (HL-)LHC searches assuming $\mathcal{O}({1\mathrm{-}3.5}~\mathrm{GeV})$ mass differences between the lightest neutral and charged states. We point out that using the $E_T^\mathrm{miss}$ distribution significantly increases the sensitivity of this search. We find the higgsinos up to 110 (210) GeV can be excluded with $139~(300)~\mathrm{fb}^{-1}$ data. The full …
Viability of Sub-TeV Higgsino Dark Matter with Nearly Mass-Degenerate Sleptons
本文研究了近质量简并 sleptons 对希格索暗物质质量的影响，发现其可使质量降至400 GeV，并满足 relic 密度约束。最新直接探测限制将下限提升至450-500 GeV，且 gaugino 质量参数符号对探测灵敏度有显著影响。
We consider the Higgs potential in generalizations of the Standard Model. The possibility of the potential to develop two almost degenerate minima is explored. This would imply that QCD matter at two distinct sets of quark masses is relevant for astrophysics and cosmology. If in the exotic minimum the QCD matter ground state is electromagnetically neutral, dark matter may consist of QCD matter and antimatter in bubbles of the Higgs field. We predict an abundance of gamma rays in the few MeV region as messengers of dark matter regions in space. In addition the ratio of dark matter to normal mat…
Based on the weak coupling expansion of gravity, we calculate the gravitational contributions to yukawa coupling, scalar quartic coupling as well as gauge couplings with general Landau-DeWitt gauge-fixing choice and a gauge preserving (of SM gauge group) cut off regularization scheme. We find that the results depend on the Landau-DeWitt gauge-fixing parameter. Based on the two loop RGE of SM couplings with one loop full gravitational contributions in harmonic gauge, we study the constraints on the higgs and top quark mass from the requirement of existing the other degenerate vacua at the Planc…
Degenerate states in the scalar boson spectrum. Is the Higgs Boson a Twin ?
标准模型的扩展到$SU(3)_L\times SU(3)_R \times SU(3)_C$被认为是。自发对称性破缺需要两个$(3^*, 3, 1)$希格斯场多重态，它们的真空期望值具有很强的等级结构。一个不变的潜在的构造，以提供这些真空的期望值。这个势赋予除了15个戈德斯通玻色子之外的所有标量场质量。当两个多重态的真空期望值一一对应时，标量玻色子谱包含简并本征态。最低本征态的质量接近123 GeV，接近LHC发现的类希格斯粒子。在一类解中，这个最低态是一个近简并的孪生态。每个成员都是来自两个多重态的场的叠加，强度大致相等。这对双胞胎是非同卵双胞胎，即传统希格斯场和希格斯场的不同组合，希格斯场不与费米子耦合，只与规范玻色子耦合。第二类解决方案导致再次简并状态，但在这种情况下，123 GeV附近的状态仍然是一个单一的状态，即使在两个多重态相同的低尺度真空期望值。
In this work, we investigate the degenerate heavy Higgs bosons in the Next-to-Minimal Supersymmetric Standard Model (NMSSM) by introducing vector-like particles. Such an extension is well motivated from the top-down view since some grand unified theories usually predict the existence of singlet scalars and vector-like particles at weak scale. Under the constraints from the LHC and dark matter experiments, we find that (1) the null results of searching for high mass resonances have tightly constrained the parameter space; (2) two degenerate heavy singlet Higgs bosons $h_2$ and $a_1$ can sizably…
Simultaneous enhancement in gamma.gamma, b.b-bar and tau+.tau- rates in the NMSSM with nearly degenerate scalar and pseudoscalar Higgs bosons
我们提出了对次最小超对称标准模型中的一种情况的实验测试，其中最轻的标量和最轻的伪标量希格斯玻色子的质量都在125 GeV左右。赝标量能对LHC的伽马速率有很大贡献，这是由于光中的类希格斯诺电荷与两个光子的有效单圈耦合。这样的charginos的mu_eff参数的小值，这也导致在增强的b. b-酒吧和τ +. τ-率相比，预期的标准模型希格斯玻色子。这种情况应该会导致在这三个衰变通道中观察到的速率与WW和ZZ通道中的速率之间存在明显的差异，因为赝标量不耦合到W和Z玻色子。然而，在主导的胶子融合产生模式中，赝标将隐藏在类SM标量希格斯玻色子后面，为了使其可观察，必须考虑相关的b. b-bar. h产生模式，其横截面在标准模型中很小，但在超对称性中被β增强。我们分析了约束NMSSM与非通用希格斯扇区参数，并确定其参数空间的区域，其中最轻的赝标量与质量约125 GeV和强烈增强的伽玛。伽玛（高达60%），b. b-酒吧和tau+。tau-率在b.b-bar.h模式可以获得。
Dark energy from non-degenerate Higgs-vacuum
本文提出一种修改的双Higgs二重态模型，利用具有非简并真空极小值且真空期望值为零的SU(2) Higgs二重态，在典型暴胀区实现晚期宇宙加速并充当暗能量。
Current discussions of the allowed two-Higgs-doublet model (2HDM) parameter space after LHC Run 1 and the prospects for Run 2 are commonly phrased in the context of a quasi-degenerate spectrum for the new scalars. Here we discuss the generic situation of a 2HDM with a non-degenerate spectrum for the new scalars. This is highly motivated from a cosmological perspective since it naturally leads to a strongly first order electroweak phase transition that could explain the matter-antimatter asymmetry in the Universe. While constraints from measurements of Higgs signal strengths do not change, thos…
Lepton Private Higgs and the discrete group Σ(81)
我们使用离散群\rtimes Z_3 =（Z_3 x Z_3 x Z_3）来研究PrivateHiggs模型中参数空间的一个特定区域。在此过程中，我们提出了中微子质量矩阵的非对角项之间的关系和μ子磁矩异常a_μ^{exp}-a_μ^{SM} ~ 10^{-9}的可能解释。我们预测了三个新的近简并的Higgs二重态，质量约为~ 500 GeV ~ 1 TeV，以及三个近简并的SM单重态TeV中微子。模型中的最大尺度为~ 10 TeV，因此没有严重的层次问题。附录是专门的群论的李（81）。
Extensions beyond the Standard Model allow for a gauge singlet scalar to be kinetically coupled with the Higgs. We consider kinetic mixing between a Dark scalar gauge singlet \emph{nearly degenerate} with the Higgs, focusing on the \emph{dynamical} aspects of the mixing phenomena. The renormalization program is carried out by obtaining the one-loop effective action which yields an effective non-hermitian Hamiltonian to study the dynamics of mixing. The scalar Higgs becomes a coherent superposition of the mass eigenstates, thus kinetic mixing leads to oscillations and common decay channels in s…
We study the production and decay of a coupled system of mixed neutral MSSM Higgs bosons in exclusive double-diffractive processes at the LHC, including non-vanishing CP phases in the soft supersymmetry-breaking gaugino masses and third-generation trilinear squark couplings. The three neutral Higgs bosons are naturally nearly degenerate, for large values of \tanβ, when the charged Higgs boson weighs around 150 GeV. Large mixing between all three neutral Higgs bosons is possible when CP is violated, a three-way mixing scenario which we also term tri-mixing. A resolution in the Higgs mass of \si…
Neutral Higgs Bosons in the Higgs Triplet Model with nontrivial mixing
我们重新审视了希格斯三重态模型的中性希格斯部分，在CP-偶希格斯部分有不可忽略的混合。我们研究的可能性，希格斯玻色子状态之一是在125 GeV的大型强子对撞机上观察到的粒子，另一个是在98 GeV的小LEP过剩;或CMS过剩在136 GeV;或中性希格斯玻色子是（几乎）简并，并有两个125 GeV的质量。我们表明，在一般情况下，一个（未混合）中性希格斯玻色子不能有一个增强的衰变分支比到伽马γ相对于标准模型。然而，对于混合的情况，增强是可能的，但只适用于两个中性希格斯玻色子玻色子中较重的一个，而不适用于质量简并的希格斯玻色子玻色子。同时，WW^*、ZZ^*、bb和tau tau的分支比与标准模型相似，或有所降低。我们关联的分支比的两个希格斯状态到Z伽马到伽马的三种情况。希格斯三重态模型的混合中性部分显示出一些特征，可以将其与LHC的其他场景区分开来。
Search for nearly degenerate higgsinos via photon fusion with the semileptonic channel at the LHC
本文提出在13 TeV LHC上利用光子聚变产生chargino对并通过半轻子道探测近简并higgsino，简单事件选择即可在3 ab⁻¹亮度下将chargino质量排除至约295 GeV，在100 fb⁻¹下也可超越现有实验限制。
Hunting Quasi-Degenerate Higgsinos
我们提出了一种新的策略来揭示光，准简并希格斯玻色子，一个可能的成分，在一个自然的超对称模型。我们的策略集中在希格斯玻色子与O（5-50）GeV的状态间分裂，产生与一个硬，初始状态喷流和衰变通过离壳规范玻色子到两个或更多的轻子和丢失的能量，$pp \to j + \text{MET}\, + 2^+\, \ell$。额外的喷流用于触发，使我们能够大大放松轻子的要求，并获得对小的希格斯诺分裂的灵敏度。通过对双轻子信号的研究，我们发现，通过仔细的剪切，diboson + jet、$\bar tt$和$Z/γ^* + j$的大背景都可以减少，而假背景则显得很小。对于Higgsino质量$m_χ$刚刚高于目前的LEP II约束（$μ\simeq 110\,$）GeV，我们发现的意义可以高达3西格玛在LHC使用现有的20 FB $^{-1}$的8 TeV的数据。外推到LHC在14 TeV与100 FB $^{-1}$数据，并作为一个例子$M_1 = M_2 = 500$ GeV，我们发现5西格玛的证据为$m_χ \lesssim\, 140\,$ GeV和2西格玛的证据为$m_χ \lesssim\, 200\,$ GeV。我们还提出了一个重新解释的ATLAS/CMS单喷边界的简并Higgsino（$δm_χ \ll 5\,$）GeV加喷生产。我们发现，目前的单喷边界上$m_χ$是没有更好的电…
We investigate the predictions on the mass spectrum and Higgs boson decays in the supersymmetric standard model extended by U(1)_B-L symmetry (BLSSM). The model requires two singlet Higgs fields, which are responsible for the radiative breaking of U(1)_B-L symmetry. It predicts degenerate right-handed neutrino masses (1.7-2.2 TeV) as well as the right-handed sneutrinos of mass <~ 4 TeV. The presence of right-handed neutrinos and sneutrinos trigger the baryon and lepton number violation processes, until they decouple from the Standard model particles. Besides, the model predicts rather heavy co…
Interference of Higgs boson resonances in mu^+ mu^- -> neutralino_i neutralino_j with longitudinal beam polarization
本文研究了纵向偏振光束在μ^+ μ^湮灭过程中共振希格斯玻色子玻色子交换对中性伴子产生的干扰。我们利用过程\neutralino_j \to \ell^\ pm \slepton^\ mp中衰变轻子的能量分布来确定中性伴子的极化。在CP守恒的最小超对称标准模型中，具有不同CP本征值的希格斯玻色子玻色子交换通道的干涉导致轻子能谱的非零不对称性。如果重中性玻色子H和A接近简并，则这种干涉的贡献很大。我们表明，不对称性可以用来确定中性希格斯玻色子与中性伴子的耦合。特别地，不对称性允许确定耦合的相对相位。我们发现大的不对称性和截面的一组参考方案与近简并中性希格斯玻色子玻色子。
Electric Dipole Moments in the CP-violating Generational Three-Higgs-Doublet Model
该研究在考虑 125 GeV 希格斯信号等实验约束的情况下，分析 CP 破缺 G3HDM 中 b 夸克等粒子的 EDM，发现模型中标量对不同粒子 EDM 的贡献抵消程度不同，导致预测结果有明显差异。
H/A Higgs Mixing in CP-Noninvariant Supersymmetric Theories
对于大质量，两个重中性希格斯玻色子在许多2-Higgs二重态模型中几乎是简并的，特别是在超对称模型中。在这种情况下，如果理论是CP-非不变的，则状态之间的混合可以非常大。我们分析描述这种配置的形式主义，我们指出一些有趣的实验结果。
Heavy Higgs Productions at $γγ$ Colliders
多希格斯双重态模型包含多个中性希格斯玻色子玻色子，其中一些在CP变换下具有不同的性质。我们在$γγ$对撞机上研究了它们的产物。研究发现，螺旋度观测的最后顶对可以是强有力的工具，以区分其CP性质，特别是当质量的希格斯玻色子玻色子几乎简并。
Empirically Consistent Electroweak Radiative Corrections with the Two-Higgs Doublet Model
的电弱辐射校正，这原来是边际内的标准电弱模型具有最小的希格斯部门鉴于目前的实验信息，很好地符合实验时，希格斯部门扩展到有两个希格斯双峰。将两个CP偶中性的希格斯玻色子质量简并化，预测了带电和CP奇希格斯玻色子质量的分布范围，使多参数空间的分析成为可能。结果表明，当带电希格斯玻色子玻色子存在且质量在一定范围内时，中性希格斯玻色子的质量可以任意大，并与$W$质量一致.
Softly Broken A_4 Symmetry for Nearly Degenerate Neutrino Masses
中微子质量的轻子Higgs二重态模型是用A_4离散对称性（4个物体的偶排列或等价于四面体的对称性）实现的，它有4个不可约表示：1，1'，1“和3。由此产生的A_4的自发软破缺提供了一个真实的荷电轻子质量模型和一个近简并的中微子质量矩阵。现象学的后果和低于TeV规模进行了讨论。
Accelerated expansion of the Universe and the Higgs true vacuum
本文提出一种具有非简并真空的惰性提升双势阱型双希格斯二重态模型（UDW-2HDM）作为暗能量模型，研究表明当两个希格斯二重态均处于真真空时，其中一个可驱动当前宇宙的加速膨胀。
In this paper, we discuss the vacuum structure of the gauge-Higgs unification theory, which is one of the attractive candidates of physics beyond the standard model. This scenario has a remarkable feature, namely it has infinitely degenerate vacua due to the characteristic periodic potential of the Higgs filed, to be identified with the extra space component of the higher dimensional gauge field. We address a question, whether to form the superposition of such degenerate vacua, like the $θ$-vacuum in QCD, is necessary or not, in order to realize the true vacuum state of the theory. We derive g…
We demonstrate a new type of cancellation of contributions to the electron and neutron electric dipole moments (EDMs) that occurs in three Higgs doublet models (3HDMs) when CP violation appears in the charged Higgs sector. The cancellation becomes exact when the two physical charged Higgs bosons in the model are degenerate in mass. Depending on the model parameters, degeneracies at the 10\% level are however sufficient to evade current bounds on the electron and neutron EDMs. We demonstrate that viable parameter space remains with both charged Higgs bosons lighter than 500 GeV and large CP-vio…
Generations of Higgs Bosons in Supersymmetric Models
我们研究了MSSM的扩展与不止一代的希格斯玻色子。如果假设对称性消除了树级FCNC，那么额外标量玻色子就不会获得VEV，不会耦合到费米子，也不会与普通的希格斯玻色子混合;最轻的是绝对稳定的。两个最轻的中性标量$ϕ_S$和$ϕ_P$在质量上是简并的，并且计算它们与最轻的带电标量$ϕ_+$之间的质量差。对于大多数的参数空间，带电标量是在一百兆电子伏和几个电子伏之间的重量比中性标量。$ϕ_+$将在顶点处衰变;这种衰变的特征将类似于电荷伴子与几乎简并的未检测到的中性伴子的特征。接下来，讨论了消除FCNC的对称性是味对称的可能性。在一个例子中，U（2）模型，树级FCNC过程可以根据夸克质量来计算。对该模型的最强约束来自$D-\bar{D}$混合，其应在电流界限的数量级内。
Updating various theoretical and experimental constraints on the four different types of two-Higgs-doublet models (2HDMs), we find that only the "lepton-specific" (or "type X") 2HDM can explain the present muon (g-2) anomaly in the parameter region of large $\tanβ$, a light CP-odd Higgs boson, and heavier CP-even and charged Higgs bosons which are almost degenerate. The severe constraints on the models come mainly from the consideration of vacuum stability and perturbativity, the electroweak precision data, $B$ physics observables like $b\to s γ$ as well as the 125 GeV Higgs boson properties m…
Standard Higgs Boson Searches at LEP 2
对于第一次在LEP的大多数事件将有四个费米子在最后的状态，我们有一个独特的机会来测试一个完整的计算与实验数据，远远超出了通常的近似计算生产截面倍分支比的希格斯衰变产物。计算的总截面和不同种类的微分分布在部分子水平上的访问最广泛的信息选择削减，讨论物理的一个标准的希格斯玻色子与质量约90 GeV的希格斯和Z信号成为退化和各种背景成分的综合分析。
The $μ\to eγ$ and $τ\to μγ$ decays in the general two Higgs Doublet model with the inclusion of one universal extra dimension
研究了一般双Higgs模型中一个普适额外维对轻子味破坏过程μ \to eγ和τ \to μγ分支比的影响.我们观察到，对于较小的紧化半径R值，这些新效应很小。此外，我们看到，这些影响是可比的分支比不包括额外的维，如果中性希格斯玻色子是近简并和汤川耦合的复杂性，诱导顶点τ-τ- $h^0 (A^0)$，是大的。
Damped $\sin(β-α)$ of Higgs couplings and the lightest Higgs production at $γγ$ colliders in MSSM
在退耦极限$M^2_{A^0} \gg M^2_Z$下，重CP偶、CP奇和带电希格斯玻色子的质量都接近简并，$\sin(β-α)$接近1，最轻的CP偶希格斯玻色子几乎表现出与标准模型希格斯玻色子相同的性质。但是，停止和底部部门可以通过辐射修正改变这种模式。我们发现，在$(g-2)_μ$和$b\to sγ$的实验约束下，MSSM中存在小、中、大$\tanβ$的参数区域，其中$\sin^2(β-α)$被阻尼（假设低于0.8），这对Higgs耦合$g_{h^0VV} (V=W^\pm,Z^0)$和$g_{h^0γγ}$有显著影响.我们讨论了它的影响最轻的CP，甚至在$γγ$对撞机希格斯生产。
Higgs Bosons at Muon Colliders
本文综述了μ子对撞机在研究S-通道产生的希格斯玻色子玻色子中的作用。可以对类似于标准模型的希格斯玻色子的质量和总宽度进行非常精确的测量，并且可以导致区分标准模型希格斯玻色子和最小超对称理论的轻希格斯玻色子。超对称理论或奇异希格斯扇区中较重的希格斯玻色子可以在s通道中研究。μ子对撞机可能在分离两个重的近简并希格斯玻色子玻色子的重叠信号中发挥关键作用，并且可能在希格斯扇区辐射校正的精确测试中发挥重要作用。在μ子对撞机上的测量将与在大型强子对撞机和电子-正电子线性对撞机上的希格斯研究相辅相成。
Resolution of Nearly Mass Degenerate Higgs Bosons and Production of Black Hole Systems of Known Mass at a Muon Collider
μ子与希格斯玻色子玻色子的直接s沟道耦合比电子大40000倍;耦合与质量平方成正比。因此，利用μ子对撞机可以对较轻的$h^0$和较高质量的$H^0$和$A^0$进行高精度扫描。预计$H^0$和$A^0$接近质量简并，分别为CP偶态和奇态。μ子对撞机可以解决质量简并进行CP测量。$K^{0}$和$B^{0}$介子系统CP破坏的起源可能是$H^0/A^0$希格斯玻色子.如果存在大的额外维度，寿命为$\sim 10^{-26}$秒的黑洞就可以在大型强子对撞机上通过霍金辐射被创造和观察。与质子或电子对撞机不同，μ子对撞机可以产生已知质量的黑洞系统。这开启了测量量子残余、引力子作为丢失能量和扫描产生的可能性。质子对撞机受到部分子分布的阻碍，CLIC受到束辐射的阻碍。ILC缺乏能源覆盖面。
LEP Indications for Two Light Higgs Bosons and U(1)' Model
对LEP数据的重新分析表明，更倾向于两个轻CP-偶希格斯玻色子玻色子。我们讨论了这种希格斯玻色子谱对由标准模型单重手征超场和附加阿贝尔规范不变性扩展的最小超对称模型（U（1）'模型）的影响。我们，特别是，确定参数区域，导致两个光CP-甚至希格斯玻色子，同时满足现有的边界上的质量和混合的额外矢量玻色子。在这些参数区域，赝标量希格斯玻色子被发现在质量上几乎简并为最轻或次轻的希格斯玻色子。U（1）模型的某些参数，如有效μ参数，被LEP双光Higgs信号显著限制。
Physics of Higgs Factories
我们概述了独特的作用的μ子对撞机作为希格斯玻色子共振生产的$s$通道中的希格斯工厂。物理实例包括：希格斯质量和总宽度的精确测量，以及由此产生的区分不同模型的类SM希格斯玻色子的能力，例如区分轻SM希格斯玻色子和MSSM的轻希格斯玻色子;通过$h\to \tautau$衰变模式确定自旋和耦合;通过能量扫描区分两个近简并的重希格斯玻色子玻色子;以及探索一般扩展希格斯扇区的能力，可能与CP违反耦合。μ子对撞机希格斯工厂可以进行测量，这将是对LHC和LC希格斯研究的高度补充;它可能在充分理解希格斯部门方面发挥非常关键的作用。
We investigate gravitational effects on the so-called multiple point criticality principle (MPCP) at the Planck scale. The MPCP requires two degenerate vacua, whose necessary conditions are expressed by vanishing Higgs quartic coupling $λ(M_{\rm Pl})=0$ and vanishing its $β$ function $β_λ(M_{\rm Pl})=0$. We discuss a case that a specific form of gravitational corrections are assumed to contribute to $β$ functions of coupling constants although it is accepted that gravitational corrections do not alter the running of the standard model (SM) couplings. To satisfy the above two boundary condition…
Higgs Quark Couplings in SUSY with CP and Flavor Violations
在具有轻Higgs扇区、明确的CP破坏和sfermion扇区中最普遍的味混合的最小超对称模型中，谱外超伴子的积分通过重夸克对轻夸克的Yukawa耦合可能有很大的贡献.这些修正可以是相当大的，即使是中等值的tan（beta），并保持非零，即使所有的超伙伴去耦。然后，希格斯玻色子与轻夸克的耦合呈现出惊人的增强;特别是，与下夸克和奇夸克的耦合随着与底夸克的耦合而退化。在希格斯玻色子搜索和FCNC观测中都会出现显著的非标准效应。
Spontaneous Breaking of Flavor Symmetry and Naturalness of Nearly Degenerate Neutrino Masses and Bi-maximal Mixing
研究了具有$SO(3)_{F}$味对称性和三个Higgs三重态的规范模型。我们展示了如何有趣的近简并中微子质量和双极大混合的情况下，自然自发破缺的对称性。中微子质量平方差之间的层次，这是需要协调太阳和大气中微子数据，自然是由一个近似的排列对称性。通过$SO(3)_{F}$规范相互作用，该模型还可以导致有趣的轻子味破坏现象。
We show that simple extensions of two Higgs doublet models consisting of new heavy neutrinos and a singly charged Higgs boson singlet can successfully explain the experimental data on muon and electron anomalous magnetic moments thanks to large chirally-enhanced one-loop level contributions. These contributions arise from the large couplings of inverse seesaw neutrinos with singly charged Higgs bosons and right-handed charged leptons. The regions of parameter space satisfying the experimental data on $(g-2)_{e,μ}$ anomalies allow heavy singly charged Higgs boson masses above the TeV scale, pro…
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