恐惧规范的希格斯模型提供了三种不同的电弱对称性破缺模型之间的插值：无希格斯模型，兰德尔-桑德拉姆模型和标准模型。在两个极端之间的参数点上，标准模型希格斯信号以降低的速率出现，而无希格斯的卡鲁扎-克莱因激发则伴随着移动的质量和耦合，以及来自保护Zbb耦合所必需的奇异夸克的信号。使用SHERPA模型的一个新的实现，我们显示了LHC信号，区分通用Gaugephobic希格斯模型从其极限情况。这些都是希格斯粒子与卡鲁扎-克莱因规范玻色子或夸克耦合的信号。我们确定了干净的信号$p p \to W^(i) \to W H$介导的卡鲁扎-克莱因W，它可以在大的利率，甚至卡鲁扎-克莱因数增强。由于来自W衰变的非常硬的轻子，这个签名几乎没有背景，并且在整个质量范围内为希格斯粒子提供了比任何标准模型模式更好的发现渠道。从新的重夸克辐射出的希格斯粒子也有很大的几率，但由于非常高的多重性最终态，它的希望要小得多。
英文摘要：
The Gaugephobic Higgs model provides an interpolation between three different models of electroweak symmetry breaking: Higgsless models, Randall-Sundrum models, and the Standard Model. At parameter points between the extremes, Standard Model Higgs signals are present at reduced rates, and Higgsless Kaluza-Klein excitations are present with shifted masses and couplings, as well as signals from exotic quarks necessary to protect the Zbb coupling. Using a new implementation of the model in SHERPA, we show the LHC signals which differentiate the generic Gaugephobic Higgs model from its limiting cases. These are all signals involving a Higgs coupling to a Kaluza-Klein gauge boson or quark. We identify the clean signal $p p \to W^(i) \to W H$ mediated by a Kaluza-Klein W, which can be present at large rates and is enhanced for even Kaluza-Klein numbers. Due to the very hard lepton coming from the W decay, this signature has little background, and provides a better discovery channel for the Higgs than any of the Standard Model modes, over its entire mass range. A Higgs radiated from new heavy quarks also has large rates, but is much less promising due to very high multiplicity final states.
Warped models with the Higgs in the bulk can generate light Kaluza-Klein (KK) Higgs modes consistent with the electroweak precision analysis. The first KK mode of the Higgs (h_{1}) could lie in the 1-2 TeV range in the models with a bulk custodial symmetry. We find that the h_{1} is gaugephobic and decays dominantly into a t\bar{t} pair. We also discuss the search strategy for h_{1} decaying to t\bar{t} at the Large Hadron Collider. We used substructure tools to suppress the large QCD background associated with this channel. We find that h_{1} can be probed at the LHC run-2 with an integrated …
The Randall-Sundrum model with a deformed metric can generate light Kaluza-Klein (KK) Higgs modes consistent with the electroweak precision analysis for a certain range of parameters. The first KK mode of the Higgs ($h_{1}$) in such a model could lie in the mass range varying from 800 GeV to 1.3 TeV. We find that the $h_{1}$ is gaugephobic and decays dominantly into a $t\bar{t}$ pair. The search strategy for $h_{1}$ decaying to $t\bar{t}$ at the Large Hadron Collider (LHC) in this low mass range has been studies. We have used substructure tools to suppress the large QCD background associated w…
One of the major goal of the Large Hadron Collider (LHC) is to probe the electroweak symmetry breaking mechanism and the generation of the masses of the elementary particles. We review the physics of the Higgs sector in the Standard Model. The main production channels of the Higgs production at the LHC are reviewed. The prospects for the discovering the Higgs particles at the LHC and the study of their fundamental properties are summarizes.
In this talk I discuss the status and future prospects of testing the Higgs self-couplings at the High Luminosity LHC (HL-LHC) as well as several Beyond Standard Model (BSM) scenarios that could be probed via Higgs pair production in the coming years.
We review the most relevant LHC searches at $\sqrt{s}$ = 8 TeV looking for low mass bosons arising from exotic decay of the Standard Model Higgs and highlighting their impact on both supersymmetric and not supersymmetric Beyond the Standard Model scenarios.
Associated production of single top and Higgs at the LHC in the littlest Higgs model with T-parity
在具有T宇称的最小Higgs模型（LHT）中，我们研究了在8和14 TeV LHC上与希格斯玻色子相关的$t$通道单顶产生.我们发现，与标准模型相比，该模型可以明显地增强横截面。通过在14 TeV LHC上利用$pp\rightarrow t(\rightarrow \ell^{+}νb)h(\rightarrow b\bar{b})j$进行简单的部分子级模拟，我们发现在有利的参数空间中信号的可观测性是有希望的。
We propose a method to determine the trilinear Higgs self coupling that is alternative to the direct measurement of Higgs pair production total cross sections and differential distributions. The method relies on the effects that electroweak loops featuring an anomalous trilinear coupling would imprint on single Higgs production at the LHC. We first calculate these contributions to all the phenomenologically relevant Higgs production ($gg{\rm F}$, VBF, $WH$, $ZH$, $t\bar tH$) and decay ($γγ$, $WW^{*}/ZZ^{*}\to 4f$, $b\bar b$, $ττ$) modes at the LHC and then estimate the sensitivity to the trili…
One Higgs was found. Are there more? In this work we discuss simple extension of the scalar sector of the Standard Model (SM) used as benchmark models by ATLAS and CMS in the searches for new scalars at the LHC. We discuss how much the discovered 125 GeV Higgs at the LHC resembles the SM Higgs and how will our understanding of the Higgs nature improve at future electron-positron colliders. Models with extended Higgs sectors provide very interesting scenarios, from the existence of charged Higgs bosons to CP-violating scalars that can be probed by the experimental collaborations at the LHC. Com…
We investigate the potential of single Higgs boson production at the LHC and at egamma mode of future linear electron-positron collider to probe non-standard HZgamma and Hgammagamma couplings. We consider the semi-elastic production process pp-> p gamma p-> pHqX at the LHC where q represents the quarks and X represents the remnants of one of the initial protons. We also study the single Higgs production through gamma e-> He in the egamma collision at the future linear collider. We perform a model-independent analysis and obtain the sensitivity bounds on the non-standard Higgs couplings for bot…
In this work, we analyse and demonstrate possible strategies to explore extended Higgs sector of the Minimal Supersymmetric Standard Model (MSSM). In particular we concentrate on heavy Higgs decays to electroweakinos. We analyse the Higgs to electroweakino decays in the allowed MSSM parameter space after taking into account 13 TeV LHC searches for supersymmetric particles and phenomenological constraints such as flavour physics, Higgs measurements and dark matter constraints. We explore some novel aspects of these Higgs decays. The final states resulting from Higgs to electroweakino decays wil…
Associated Production of Higgs Boson and $t\bar t$ at LHC
大型强子对撞机的未来目标之一是精确测量希格斯玻色子的性质。伴随产生的希格斯玻色子玻色子和顶夸克对是研究相关汤川相互作用和希格斯粒子性质的一个很有前途的过程。与标准模型中的纯标量扇区相比，许多新物理模型中的希格斯扇区同时包含标量和赝标量，这使得$t\bar t H$相互作用更加复杂，提供了多种多样的现象。为了研究$t\bar t H$相互作用和Higgs的性质，我们在LHC上研究了顶夸克自旋关联观测。
