MRI: Development of a Silicon Vertex Detector for the Higgs Search at the Tevatron Collider

MRI：开发用于 Tevatron 对撞机希格斯粒子搜索的硅顶点探测器

• 批准号: 0116649
• 负责人: Alice Bean
• 金额: $ 168.36万
• 依托单位: University of Kansas Center for Research Inc
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-08-15 至 2005-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0116649&HistoricalAwards=false
• 关键词: MRI; Development; Silicon; Vertex; Detector

This proposal requests support for the development of a Silicon Vertex Detector to allow discovery of the long-sought Higgs boson using the D0 detector in Run II at the Fermilab Tevatron proton-antiproton collider. The Tevatron collider is currently the only facility in the world capable of making a Higgs discovery. Simulation studies have shown that the two Tevatron collider experiments, CDF and D0, are sensitive to the Higgs over almost all its presently allowed mass range. Furthermore, there is some evidence from the recently decommissioned LEP electron-positron collider at CERN for a light Higgs (~115 GeV) in the region where the Fermilab experiments have their greatest sensitivity.A key element in the Higgs search is the ability to detect the b-quarks from Higgs decay. The b-quark lifetime is sufficiently long (~1.5 picoseconds) that it can be identified by a Silicon Vertex Detector that precisely measures charged particle tracks. The current D0 silicon detector was designed well before the potential for making a Higgs discovery was appreciated and is not sufficiently radiation-hard for the Higgs search. Thus, the D0 collaboration has embarked on designing a new Silicon Vertex Detector that is specifically optimized for the Higgs search, to be installed by 2004 when the performance of the current vertex detector will have been diminished by radiation damage.With this MRI proposal, a consortium of eight university groups, five of which are currently supported by the NSF for their D0 work, propose to develop, procure, assemble, and test the silicon sensor assemblies for five of the six layers that will be built. These assemblies are the active elements that make the charged track measurements and constitute a major contribution to the detector. The development of this new silicon vertex detector would be a joint development project between university groups and Fermilab. Much of the intellectual and technical leadership for this effort originates in the university groups. NSF support will bring strong intellectual and technical input to the project through the design, fabrication, and testing of detector components by university faculty and students working closely together at their home institutions.

该提案请求支持硅顶点探测器的开发，以便在费米实验室 Tevatron 质子-反质子对撞机的 Run II 中使用 D0 探测器发现人们长期寻找的希格斯玻色子。 Tevatron 对撞机是目前世界上唯一能够发现希格斯粒子的设施。 模拟研究表明，两个 Tevatron 对撞机实验 CDF 和 D0 对几乎所有目前允许的质量范围内的希格斯粒子都很敏感。 此外，CERN 最近退役的 LEP 正负电子对撞机提供了一些证据，在费米实验室实验灵敏度最高的区域存在轻希格斯粒子（~115 GeV）。希格斯粒子搜索的一个关键要素是能够探测希格斯衰变中的 b 夸克。 b 夸克的寿命足够长（~1.5 皮秒），可以通过精确测量带电粒子轨迹的硅顶点探测器来识别。 当前的 D0 硅探测器是在发现希格斯玻色子的潜力被认识之前就设计的，并且对于希格斯玻色子搜索来说还不够抗辐射。 因此，D0 合作组织已开始设计一种新的硅顶点探测器，专门针对希格斯粒子搜索进行了优化，将于 2004 年安装，届时当前顶点探测器的性能将因辐射损伤而降低。通过这项 MRI 提案，一个由八个大学团体组成的联盟（其中五个团体目前得到了 NSF 的 D0 工作支持）提议开发、采购、组装和测试该探测器。 硅传感器组件用于将要建造的六层中的五层。 这些组件是进行带电轨道测量的有源元件，并对探测器做出了主要贡献。 这种新型硅顶点探测器的开发将是大学团体和费米实验室之间的联合开发项目。 这项工作的大部分智力和技术领导力都来自大学团体。 NSF 的支持将为该项目带来强大的智力和技术投入，由大学教职员工和学生在其所在机构密切合作，设计、制造和测试探测器组件。