Studies in Elementary Particle Physics

该提案要求资金支持世界上最高能量强子对撞机的实验粒子物理研究项目。该项目包括费米实验室Tevatron的CDF实验和欧洲核子研究中心大型强子对撞机（LHC）的CMS实验的持续合作。CDF实验目前正处于调优/数据采集阶段，预计将运行数年。CMS实验正准备在2007年开始操作。该计划的科学目标是确定自发对称性破缺的来源，并进行精确的重夸克测量，以约束超出标准模型的物理学。自发对称性破缺的许多理论机制包括优先衰变为重夸克或其他“长”寿命状态的状态。随着Tevatron的光度增加，寻找与自发对称性破缺有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个主题。他们为这两个实验的硅基顶点跟踪做出了贡献。该技术允许通过搜索从主顶点位移的辅助顶点来识别长寿命状态。他们为CDF的新型硅条顶点探测器的硬件、软件、调试和校准做出了贡献，也为该系统的下一次升级做出了贡献。该小组正在为CMS的前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/推广领域，拟议的研究计划的影响超出了“粒子物理学”的狭隘定义。本文提出的有源像素探测器技术在同步加速器光源上用于研究材料和生物系统的仪器中具有应用价值。他们正在与天文学的同事讨论他们的像素模拟代码在红外像素传感器上的应用，该代码可能有助于理解和优化用于星载望远镜的红外探测器。提议的分布式数据库工作与JHU的同事在几个大型天文学项目中所做的工作有很大的重叠。分布式数据库是另一种基于互联网的技术，它可能在我们社会的各个领域都有深远的应用。拟议的研究有很强的教育成分。它为许多研究生和本科生提供直接支持和培训，他们是QuarkNet中心的主人，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.