Experimental Studies of the Higgs Mechanism in the Standard Model and Beyond

标准模型及其他模型中希格斯机制的实验研究

• 批准号: 2012055
• 负责人: John Hobbs
• 金额: $ 185万
• 依托单位: SUNY at Stony Brook
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-07-15 至 2024-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2012055&HistoricalAwards=false
• 关键词: Experimental; Studies; Higgs; Mechanism; Standard

The start-up of the Large Hadron Collider (LHC) a decade ago ushered in a new era of research in hitherto inaccessible energy regimes. The discovery of the Higgs boson is the first major highlight of the LHC program, which established that the predicted particle content and interactions of the Standard Model (SM) are complete. Despite this success, the SM is widely believed to be an incomplete theory. Ongoing studies must determine whether or not this new Higgs boson is that of the SM, and new experimental data are essential to discover if and how Nature has chosen to extend the SM. These studies include new measurements and searches for new physics, primarily using data recorded at a center-of-mass energy of 13 TeV. The physics analysis activities form a comprehensive program to extend characterization of Higgs boson properties.This project will analyze data collected with the ATLAS experiment at CERN’s Large Hadron Collider. The research includes standard model di-boson measurements, Higgs boson decay properties, and speculative Beyond–the–Standard–Model searches involving Higgs boson production and decay. In addition, the Stony Brook group will lead activities in ATLAS maintenance and operations, algorithm development, and detector upgrades. With the Higgs’ key role in standard model electroweak symmetry breaking, as well as being the only known elementary scalar particle, exploration of its properties is central to particle physics. To that end, this project includes studies of WW production to understand the role of the Higgs boson in vector boson scattering and searches for new physics through modified quartic couplings in boson scattering, studies of the properties of the Higgs boson in associated production focusing on the newly established bottom-antibottom decay mode, extending the sensitivity to higher transverse momenta based on jet substructure techniques and improved b-tagging, and searches for the rare and BSM modes. The Stony Brook group has responsibilities for liquid argon calorimeter operations including the installation and commissioning of the Phase I upgrade liquid argon Back End upgrade electronics, and responsibilities for silicon detector operations. They are involved in the ATLAS tracker upgrade R&D and have design, testing and production responsibilities for the HL-LHC liquid argon calorimeter read-out digital processor system.This work provides undergraduate and graduate students with the opportunity to participate in leading edge scientific research and instrumentation development. Undergraduate students have the opportunity to participate both through academic year research activities and through the group’s participation in the Stony Brook REU program. This project includes a program of student and community education to be initially hosted at Stony Brook and then more broadly. The group also participates in the local QuarkNet efforts and will host the Higgs Couplings 2020 conference, which will include a public day with lectures and a panel discussion.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

十年前，大型强子对撞机（LHC）的启动迎来了迄今无法访问的能源制度的新研究时代。希格斯玻色子的发现是LHC程序的第一个主要亮点，该计划确定了标准模型（SM）的预测粒子含量和相互作用是完整的。尽管取得了成功，但SM被普遍认为是一个不完整的理论。正在进行的研究必须确定这种新的希格斯玻色子是否是SM的玻色子，而新的实验数据对于发现自然是否和如何选择扩展SM至关重要。这些研究包括新的测量和搜索新物理学，主要使用在13 TEV的质量中心能量记录的数据。物理分析活动构成了一个综合计划，以扩展Higgs玻色子性能的表征。该项目将通过CERN大型强子撞机的Atlas实验分析数据。该研究包括标准模型Di-Boson测量，Higgs玻色子衰减特性以及超越标准 - 模型搜索涉及Higgs玻色子生产和衰减的搜索。此外，Stony Brook集团将领导ATLAS维护和操作，算法开发和检测器升级方面的活动。 Higgs在标准模型电子对称性破坏以及唯一已知的基本标量粒子中的关键作用，其特性的探索是粒子物理学的核心。为此，该项目包括对WW生产的研究，以了解Higgs Boson在向量玻色子散射中的作用，并通过玻色子散射中修改的四分之一耦合来寻找新物理学，研究Higgs玻色子在相关的生产中的性能，并集中于新近建立的跨性别型号，扩展了跨性别的速度，以扩展速度较高的速度，以实现较高的敏感性，以实现速度的启发性，从b标记，并搜索稀有和BSM模式。 Stony Brook Group负责液体氩热量计的操作，包括安装和调试I期升级液体氩气后端升级电子设备以及硅探测器操作的责任。他们参与了ATLAS Tracker升级研发，并对HL-LHC液体氩气添加数字处理器系统具有设计，测试和生产责任。这项工作为本科生和研究生提供了参与前沿科学研究和仪器开发的机会。本科生有机会在学年的研究活动和小组参加Stony Brook REU计划中参与。该项目包括一个学生和社区教育计划，最初是在Stony Brook举办的，然后更广泛地托管的。该小组还参加了当地的Quarknet努力，并将举办Higgs Couplings 2020会议，其中包括举行讲座和小组讨论的公开日。这项奖项反映了NSF的法定任务，并被认为是通过基金会的知识分子优点和更广泛的审查标准来通过评估来通过评估来获得的支持。

项目成果

Search for dijet resonances in events with an isolated charged lepton using $$ \sqrt{s} $$ = 13 TeV proton-proton collision data collected by the ATLAS detector

• DOI: 10.1007/jhep06(2020)151
• 发表时间: 2020-02
• 期刊: Journal of High Energy Physics
• 影响因子: 5.4
• 作者: Atlas Collaboration