Studies in Elementary Particle Physics

20世纪的主要智力成就之一是粒子物理标准模型(SM)的发展。这个模型成功地将当时已知的所有基本粒子归入具有相似量子性质的群组的层次中。在大型强子对撞机(LHC)上发现的希格斯玻色子证实了这个模型到目前为止的有效性。然而，目前存在的标准模型留下了许多关于宇宙的问题，包括为什么希格斯质量具有它的价值这样的基本问题。大型强子对撞机上的紧凑型介子螺线管(CMS)实验的主要功能之一是发现标准模型以外的新物理。大型强子对撞机仍然是主要的能源前沿粒子加速器，在瑞士日内瓦附近的欧洲核子研究中心实验室运行。这个项目将分析CMS实验的最新数据，寻找超越标准模型的信号。该奖项将完成的工作将影响三个广泛的领域：1)进一步发展分析技术，很可能在大型强子对撞机上发现新的物理；2)对CMS探测器(HL-LHC)的新跟踪探测器进行校准；3)劳动力发展和更广泛的社区推广。这个小组领导了发现希格斯粒子的4轻子衰变通道的工作。该奖项将扩展在该发现中开发的分析技术，将其应用于大型强子对撞机现在提供的新数据，并将其用于超越标准模型的物理新搜索。为了发现这种新的物理学，这个小组将探索希格斯玻色子的大量数据样本，测量细节，例如希格斯玻色子的质量、宽度、量子数、电荷宇称性质的精确测量，以及更广泛地说，希格斯与矢量玻色子和费米子相互作用的张量结构。现在可用的更大的数据集可能会产生新的对称性破坏源(称为带电宇称或CP破坏)，这可能与希格斯玻色子有关。该项目还将为CMS探测器的运行和研究用于大型强子对撞机(HL-LHC)高光度升级的新探测器技术做出技术贡献。对探测器升级研究的贡献是基于为支持目前的行动而开发的工具。PI的组织是QuarkNet中心的东道主，该中心目前拥有25名巴尔的摩地区高中教师的成员。QuarkNet中心发起并帮助组织了一系列非常成功的地区性物理博览会，为数千名地区居民带来了科学。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。

One of the major intellectual achievements of the 20th century was the development of the Standard Model (SM) of particle physics. This model succeeded in classifying all the elementary particles known at the time into a hierarchy of groups having similar quantum properties. The validity of this model to date was confirmed by the discovery of the Higgs boson at the Large Hadron Collider (LHC). However, the Standard Model as it currently exists leaves open many questions about the universe, including such fundamental questions as to why the Higgs mass has the value it has. One of the primary functions of the Compact Muon Solenoid (CMS) experiment at the LHC, which remains the premier Energy Frontier particle accelerator, operating at the CERN laboratory near Geneva Switzerland, is to discover new physics beyond the Standard Model. This project will analyze the latest data from the CMS experiment looking for signals of beyond the Standard Model. The work that will be accomplished with this award will impact three broad areas: 1) furthering the analysis techniques that might well discover new physics at the LHC 2) Alignment of the new tracking detector upgrade of the CMS detector (HL-LHC) and 3) workforce development and outreach to the broader community.This group led the work on the 4-lepton decay channel in the discovery of the Higgs. This award will expand on analysis techniques developed in that discovery, applying it to the new data that has now been delivered by the LHC and use it in new searches for physics beyond the Standard Model. To discover this new physics, this group will probe the large data sample of Higgs bosons, measuring details such as precision measurements of the Higgs boson mass, width, quantum numbers, Charge Parity properties, and more generally, the tensor structure of Higgs interactions with vector bosons and fermions. The larger dataset now available could yield new sources of symmetry violation (called Charged Parity or CP violation) that might be associated with the Higgs boson. This project will also support technical contributions to the operation of the CMS detector and to the study of new detector technology for high luminosity upgrades of the LHC, the HL-LHC which has now just started. The contributions to the study of detector upgrades are based on tools that were developed to support the present operation. The PI's group is the host of a QuarkNet center that has a current membership of 25 Baltimore area high school teachers. The QuarkNet center has initiated and helped to organize a very successful series of regional Physics Fairs that have brought science to thousands of area residents.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.