Studies in Elementary Particle Physics

这项提案要求资金支持世界上能量最高的强子对撞机上的实验粒子物理研究计划。该计划包括继续合作费米实验室Tevatron的CDF实验和CERN大型强子对撞机(LHC)的CMS实验。CDF实验目前正处于调整/数据采集阶段，预计将持续数年。CMS实验正在筹备中，将于2007年开始运行。该计划的科学目标是确定对称性自发破缺的来源，并进行精确的重夸克测量，以限制超出标准模型的物理条件。许多自发对称性破缺的理论机制包括优先衰变为重夸克或其他“长”生命态的态。随着Tevatron光度的增加，寻找与自发对称性破缺相关的新状态应该变得可行，并将依赖于与重味物理相关的技术。该小组对这两个实验的技术贡献都遵循这一主题。他们为这两个实验的硅基顶点跟踪做出了贡献。这项技术允许通过搜索从主顶点移位的次顶点来识别长期状态。他们为CDF的新硅条顶点探测器的硬件、软件、调试和校准做出了贡献，也为RUN 2b该系统的下一次升级做出了贡献。该小组正在为CMS的正向像素跟踪系统做出贡献，特别是在传感器开发、系统设计、基础设施和软件领域。在教育/外展领域，拟议的研究计划的影响超出了“粒子物理学”的狭义定义。所提出的有源像素探测器技术的工作已应用于同步辐射光源研究材料和生物系统的仪器。他们正在与天文学同事讨论将他们的像素模拟代码应用于红外像素传感器，该代码可能有助于理解和优化用于卫星望远镜的红外探测器。拟议的分布式数据库工作与JHU同事为几个大型天文学项目所做的工作有很大重叠。分布式数据库是另一种基于互联网的技术，可能在我们社会的各个部门都有深远的应用。这项拟议的研究具有很强的教育性。它为许多研究生和本科生提供直接支持和培训，他们是QuarkNet中心的东道主，该中心已经为巴尔的摩市的两名公立高中教师提供了暑期研究经验。

This proposal requests funds to support a program of experimental particle physics research at the world's highest energy hadron colliders. The program involves the continuing collaboration in the CDF experiment at the Fermilab Tevatron and the CMS experiment at the CERN Large Hadron Collider (LHC). The CDF experiment is currently in a tuning/data-taking phase and is expected to run for a number of years. The CMS experiment is being prepared to begin operation in 2007. The scientific goals of the program are to determine the source of spontaneous symmetry breaking and to make precise heavy quark measurements that constrain physics beyond the Standard Model. Many theoretical mechanisms of spontaneous symmetry breaking include states that preferentially decay into heavy quarks or other "long"-lived states. As the luminosity of the Tevatron increases, the search for new states related to spontaneous symmetry breaking should become feasible and will rely on techniques associated with heavy flavor physics. The technical contributions of the group to both experiments follow this theme. They are contributing to the silicon-based vertex tracking of both experiments. This technology permits the identification of long-lived states by searching for secondary vertices displaced from the primary vertex. They have contributed to the hardware, software, commissioning, and calibration of new silicon strip vertex detectors for CDF and are also contributing to the next upgrade of this system for Run 2b. The group is making contributions to the forward pixel tracking system of CMS, particularly in the areas of sensor development, system design, infrastructure, and software. In the education/outreach area, the impact of the proposed research program reaches beyond the narrow definition of "particle physics". The proposed work on active pixel detector technology has application to instrumentation used at synchrotron light sources to study materials and biological systems. They are discussing the application of their pixel simulation code to infrared pixel sensors with colleagues in astronomy and the code may be useful in the understanding and optimization of infrared detectors for use in satellite-borne telescopes. The proposed work on distributed databases has strong overlap with work being done by JHU colleagues for several large astronomy projects. Distributed databases are another internet-based technology that could have far-reaching application in all sectors of our society. The proposed research has a strong educational component. It provides direct support and training for a number of graduate and undergraduate students and they are the hosts of a QuarkNet center that has already provided summer research experience for two Baltimore City public high school teachers.