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

随着希格斯玻色子在大型强子对撞机上的发现，标准模型似乎是完整的，尽管深刻的问题仍然没有答案。其中一个谜团是宇宙中物质-反物质不对称性的起源（重子生成）和暗物质的性质。该研究计划的重点是CMS实验目前运行在质子-质子大型强子对撞机（LHC）在欧洲核子研究中心在日内瓦，瑞士。这项研究将加深我们对希格斯玻色子的理解，使用CMS实验的数据来阐明希格斯玻色子物理学与标准模型之外的新物理学之间的联系。这项工作还将支持高亮度LHC的CMS前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，还将开展一项研究，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，LHC产生的60个希格斯玻色子事件中，约有1个与Z玻色子有关。测量这个罕见的过程可能会对新物理学的影响敏感。此外，这种最终状态可以通过一个额外的、更重的希格斯玻色子的衰变产生，该玻色子具有与观察到的玻色子不同的对称性。这种粒子被许多理论预言，并可能回答重子生成的问题。暗物质粒子也可能在大型强子对撞机上产生，但它们的实验特征是模糊的。希格斯玻色子的相关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法。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有其他应用。本研究的第二个方面是升级CMS前向像素跟踪器，重点是读出芯片，超过目前的高带宽，低阈值和辐射耐受能力。这项工作将专注于测试原型芯片，并为CMS像素读出芯片的设计做出贡献，以便新探测器可以投入使用。此外，通过数据收集、访谈和与其他大学的比较，了解影响学生选择物理专业的原因。该奖项反映了NSF的法定使命，并通过使用基金会的智力价值和更广泛的影响审查标准进行评估，被认为值得支持。

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.