宇宙中的非重子暗物质可以由新的稳定的带电物质组成，通过普通的库仑相互作用束缚在重的中性“原子”中。第四代稳定的$\bar U$（反$U$）夸克，被束缚在稳定的无色（$\bar U \bar U \bar U $）簇中，被大爆炸核合成中产生的原始氦捕获，从而形成中性的O-氦（OHe）原子，这是一种特殊的核相互作用暗物质，可以为直接寻找暗物质的难题提供解决方案。然而，第四代夸克和轻子的存在应该会影响希格斯玻色子玻色子的产生和衰变速率，并且如果希格斯玻色子玻色子与第四代费米子的耦合不被抑制，则在LHC的希格斯玻色子玻色子搜索的实验结果中排除了第四代夸克和轻子的存在。在这里，我们认为，三个已知的夸克-轻子家族和第四家族之间的差异可以自然地导致这种耦合的抑制，这种复合暗物质场景的加速器测试的详细研究的生产和衰变模式的125.5 GeV玻色子，在大型强子对撞机发现。
英文摘要：
The nonbaryonic dark matter of the Universe can consist of new stable charged species, bound in heavy neutral "atoms" by ordinary Coulomb interaction. Stable $\bar U$ (anti-$U$)quarks of 4th generation, bound in stable colorless ($\bar U \bar U \bar U $) clusters, are captured by the primordial helium, produced in Big Bang Nucleosynthesis, thus forming neutral "atoms" of O-helium (OHe), a specific nuclear interacting dark matter that can provide solution for the puzzles of direct dark matter searches. However, the existence of the 4th generation quarks and leptons should influence the production and decay rates of Higgs boson and is ruled out by the experimental results of the Higgs boson searches at the LHC, if the Higgs boson coupling to 4th generation fermions with is not suppressed. Here we argue that the difference between the three known quark-lepton families and the 4th family can naturally lead to suppression of this coupling, relating the accelerator test for such a composite dark matter scenario to the detailed study of the production and modes of decay of the 125.5 GeV boson, discovered at the LHC.
Associated production of single top and Higgs at the LHC in the littlest Higgs model with T-parity
在具有T宇称的最小Higgs模型（LHT）中，我们研究了在8和14 TeV LHC上与希格斯玻色子相关的$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。
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…
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。
