Higgs物理及相关新物理在LHC及未来对撞机项目上的唯象学研究

Since the LHC discovery of the SM-like Higgs boson with mass of 125 GeV, there are still several fundamental questions in the particle physics. To address these questions, new physics models Beyond the Standard Model (BSM) typically offer new ingredients. ..This research project will probe the discovery potential of the BSM Higgs bosons, other new particles, and possible dark matter candidates at the LHC and the future high-energy collider projects. Our research will focus on the class of models with extended Higgs sector in general, such as the minimal supersymmetric standard model (MSSM), the two-Higgs-doublet model (2HDM), and the left-right symmetric model (LRSM)...To begin with, we will study the constraints to the parameter spaces of these models, by combining the current LHC measurement of the Higgs boson, together with other theoretical and experimental constraints. Afterwards, we shall study the production and decay channels of various new particles. For specific models, we shall study the promising signal channels at the LHC experiments running at 14 TeV, the future electron-positron collider projects, and the 50-100 TeV hadron collider. Combined with the parameter space constraints, we shall offer benchmark models for the future experimental searches. Such work would bring us better understanding of the properties of the BSM Higgs bosons, the new particles, and the dark matter particles. In the last part of the project, we shall discuss the BSM models including dark matter candidates. We focus on the possible dark matter interactions with the SM particles, and we aim to perform the MC simulations at the LHC, the electron-positron colliders, and the higher energy hadron colliders. The results from the collider analysis will be complimentary to the latest dark matter direct and indirect experiments.

本项目的研究将通过理论计算以及Monte Carlo 模拟分析，探索在LHC及未来对撞机项目上非标准模型Higgs boson，其他新粒子，以及暗物质候选粒子可能的产生通道和信号。我们的研究将尤其着重于探讨 MSSM，2HDM，LRSM几类主要的新物理模型。首先，我们将结合现有的LHC 实验数据以及其他相关的理论和实验限制，对这些模型的总体参数空间进行限制。其次，我们将分别对不同的新粒子研究它们可能的对撞机产生和衰变通道。具体到不同的模型，我们将分别研究这些粒子在LHC，正负电子对撞机，以及更高能 50-100 TeV 强子对撞机上最有利的信号通道。结合具体模型的参数空间限制，我们为对下一步的实验物理工作提供benchmark models。这些研究将让我们了解在LHC及其他高能对撞机项目上对非标准模型Higgs bosons 性质的测量。最后，本研究项目也将广泛探讨含有暗物质候选粒子。

在该面上项目资助中，我们着眼研究了超出标准模型的新物理模型的一系列重要实验检验，侧重于LHC 实验及未来高能正负电子对撞机（诸如中国的 CEPC 项目等）的Higgs 物理。我们的研究重点讨论了两个 Higgs 二重态的新物理模型中的一系列物理结果，包括了LHC 上对重的超出标准模型Higgs 的寻找，宇称破缺效应的原子物理电偶极矩精确测量限制，以及新物理通过圈图修正在未来高能正负电子对撞机上的精确测量效应等。在该项目资助下共计发表期刊论文12篇，为后续进一步研究相关新物理重要理论问题奠定了基础。