Beyond the Standard Model Higgs Boson: Exploring the Higgs sector at the LHC

超越标准模型希格斯玻色子：探索大型强子对撞机的希格斯扇区

• 批准号: 1806622
• 负责人: Corrinne Mills
• 金额: $ 24万
• 依托单位: University of Illinois at Chicago
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-08-15 至 2022-01-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1806622&HistoricalAwards=false
• 关键词: Beyond; Standard; Model; Higgs; Boson

With the discovery of a Higgs boson at the LHC, the Standard Model appears to be complete although profound questions remain unanswered. One such mystery is the origin of the matter-antimatter asymmetry of the universe (baryogenesis) and the nature of dark matter. This program of research is centered on the CMS experiment currently running at the proton-proton Large Hadron Collider (LHC)at CERN in Geneva, Switzerland. This research will deepen our understanding of the Higgs boson using data from the CMS experiment to elucidate the connection between the physics of Higgs bosons and new physics beyond the Standard Model. This work will also support the upgrade of the CMS forward pixel detector for the high-luminosity LHC, with a focus on the design, selection, and testing of a read-out chip. In addition, a study will be carried out to understand the reasons why students decide to leave or remain in a physics major at UIC.In the Standard Model, about one out of sixty Higgs boson events produced at the LHC is produced in association with a Z boson. Measuring this rare process will be potentially sensitive to the influence of new physics. Further, this final state can be produced by the decay of an additional, heavier Higgs boson with different symmetry properties from the observed one. Such particles are predicted by many theories and can potentially answer the question of baryogenesis. Dark matter particles may also be produced at the LHC, but their experimental signature would be ambiguous. Associated production of a Higgs boson may be a unique way to flag these interactions and discover this elusive particle. This effort will develop new experimental tools and analyses for a decay channel of the Higgs boson, and will have other applications in collider data analysis. The second aspect of this research is to upgrade the CMS forward pixel tracker, focusing on readout chips that exceed current capabilities for high bandwidth, low threshold, and radiation tolerance. The work will focus on testing prototype chips and contributing to the design of the CMS pixel readout chip, so that the new detector will be ready for construction. In addition, through data collection, interviews, and comparison with other universities, understanding of the reasons affecting students' decision to stay with or leave the physics major will be improved.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.

随着大型强子对撞机上希格斯玻色子的发现，标准模型似乎已经完成，尽管一些深刻的问题仍然没有得到回答。其中一个谜团是物质的起源--宇宙的反物质不对称性(重物发生)和暗物质的性质。这项研究计划是以目前在瑞士日内瓦欧洲核子研究中心质子-质子大型强子对撞机(LHC)上运行的CMS实验为中心的。这项研究将加深我们对希格斯玻色子的理解，利用CMS实验的数据来阐明希格斯玻色子的物理学与超越标准模型的新物理之间的联系。这项工作还将支持用于高亮度大型强子对撞机的CMS正向像素探测器的升级，重点是读出芯片的设计、选择和测试。此外，还将进行一项研究，以了解学生决定离开或留在UIC物理专业的原因。在标准模型中，在大型强子对撞机产生的大约60个希格斯玻色子事件中，大约有1个是与Z玻色子有关的。测量这一罕见的过程可能会对新物理学的影响很敏感。此外，这种终态可能是由一个额外的、更重的希格斯玻色子衰变而产生的，这个希格斯玻色子的对称性与观测到的不同。这样的粒子被许多理论预测，并有可能回答重子发生的问题。大型强子对撞机也可能产生暗物质粒子，但它们的实验特征将是模棱两可的。希格斯玻色子的关联产生可能是标记这些相互作用并发现这种难以捉摸的粒子的独特方式。这项工作将为希格斯玻色子的衰变通道开发新的实验工具和分析，并将在对撞机数据分析中得到其他应用。这项研究的第二个方面是对CMS前向像素跟踪器进行升级，重点放在读出芯片上，这些芯片在高带宽、低阈值和抗辐射方面超过了当前的能力。这项工作将集中于测试原型芯片，并为CMS像素读出芯片的设计做出贡献，以便新的探测器将准备好建造。此外，通过数据收集、访谈和与其他大学的比较，将提高对影响学生决定留在或离开物理专业的原因的了解。该奖项反映了NSF的法定使命，并通过使用基金会的智力优势和更广泛的影响审查标准进行评估，被认为值得支持。