U.S. CMS Operations at the Large Hadron Collider

高能物理的研究人员试图了解物质的基本性质及其相互作用的基本作用力。他们做到这一点的一种方法是观察反向旋转的质子束碰撞时会发生什么。碰撞产生的碎片的特征可以揭示基本粒子的基本物理以及它们之间的作用力。测量这些特性需要高度精密的粒子探测器和分析方法。NSF为美国研究人员提供资金，让他们使用大型强子对撞机(LHC)的CMS探测器进行实验高能物理研究，大型强子对撞机是进行这项研究的世界领先实验室。除了直接支持研究活动，NSF还将通过这项合同向20所美国大学提供资金，以维持美国提供的CMS探测器组件及其支持软件和计算系统的运行，开发新的软件工具，并安装和调试探测器增强功能，为计划于2027年开始的更密集的操作做准备。该奖项还将促进科学教育，促进多样化的研究参与。大型强子对撞机位于瑞士日内瓦附近的欧洲核子研究组织(CERN)。美国参与CMS将刺激受过科学和技术教育的劳动力的发展，推动技术的多学科应用，并向公众普及和传播科学。该奖项将支持为开发和维护复杂的探测器设备、定制的模拟和数字电子设备以及用于数据管理的软件系统提供机会的活动，并支持探测器系统的数据处理和技术分析。技术专业人员需要执行其中的许多任务，从而增加了美国劳动力的专业知识。现有探测器部件的操作、升级部件的设计以及相关研究活动为大学物理人员、工程系大学人员和物理系技术人员之间的跨学科合作创造了机会，因为物理学家、电气工程师、机械工程师和计算机科学家与博士后和学生一起工作。同样，物理人员将与本国机构和国家实验室的计算专业人员密切合作，支持各种软件和计算活动。技术部分：该奖项支持对研究质子-质子碰撞碎片至关重要的仪器和分析工具的开发和操作。这些工具对于回答诸如“基本粒子的质量来源是什么？”等基本的基础性问题是必不可少的。希格斯玻色子的发现是产生基本粒子质量机制的物理表现，导致了2013年的诺贝尔物理学奖，该奖项被授予彼得·希格斯和弗朗索瓦·恩格勒。这是故事的结尾吗，或者还有其他尚未被发现的对这一过程的贡献？其他同样重要的基本问题的答案可能至少部分取决于通过继续运行和分析从大型强子对撞机获得的数据所观察到的物理。“占宇宙质量25%的暗物质是什么？在大型强子对撞机上能产生和观测到暗物质吗？能在大型强子对撞机的能量中找到在某些模型中预测的额外维度的证据吗？与迄今观察到的任何形式的物质不同，是否存在具有奇异性质的粒子，其存在是通过扩展基本粒子标准模型的一些理论来预测的？在每一种情况下，回答问题都需要汇总大量数据，从中得出有意义的统计推断。这一奖项将使研究人员能够将为分析和调查这些现象收集的数据量增加一倍。它将使准备工作能够导致未来收集大约十倍于目前可用数据的数据。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。

Researchers in high energy physics seek to understand the fundamental nature of matter and the basic forces through which it interacts. One way they do this is by observing what happens when counter-rotating beams of protons collide. The characteristics of the debris produced in the collisions can reveal the basic physics of fundamental particles and the forces between them. Highly sophisticated particle detectors and analysis methods are required to measure these characteristics. NSF provides funding to U.S. researchers to conduct research in experimental high energy physics using the CMS detector at the Large Hadron Collider (LHC), the world’s premier laboratory for this research. In addition to directly supporting research activities, NSF will provide, via this award, funding to twenty US universities to maintain the operation of U.S.-supplied components of the CMS detector and its supporting software and computing systems, develop new software tools, and install and commission detector enhancements in preparation for more intense operation planned to commence in 2027. This award will also promote science education and promote diverse participation in research. The Large Hadron Collider is located at the European Organization for Nuclear Research (CERN) near Geneva Switzerland.U.S. participation in CMS will stimulate the development of a scientific and technically educated workforce, advancing the multidisciplinary application of technology, and the popularization and dissemination of science to the general public. The award will support activities that provide opportunities to develop and maintain complex detector apparatus, custom analog and digital electronics and software systems for data management, and to support data processing and technical analyses of detector systems. Technical professionals are required to perform many of these tasks, increasing the expertise of the U.S. work force. The operation of existing detector components, design of upgrade components, and related research activities create opportunities for interdisciplinary collaboration among university physics personnel, university personnel in engineering departments, and physics department technical personnel as physicists, electrical engineers, mechanical engineers and computer scientists work with post-docs and students. Similarly, physics personnel will work closely with computing professionals at their home institutions and at national laboratories to support the various software and computing activities.Technical part: This award supports the development and operation of the instrumentation and analysis tools that are essential to studying debris from proton-proton collisions. These tools are essential for answering basic, foundational questions, such as “What is the origin of mass of the elementary particles?” The Higgs Boson discovery, a physical manifestation of the mechanism that generates elementary particle masses, led to the 2013 Physics Nobel Prize that was awarded to Peter Higgs and Francois Englert. Is that the end of the story, or are there other, as-of-yet undiscovered, contributions to this process? Other fundamental questions, equally important, may have answers that depend, at least in part, on the physics observed through the continued operation and analysis of data obtained from the LHC. “What is the dark matter that accounts for 25% of the mass of the universe? Can dark matter be produced and observed at the LHC? Can evidence of extra dimensions predicted in some models be found at LHC energies? Are there particles with exotic properties, unlike any forms of matter observed so far, whose existence is predicted by some theories that extend the standard model of elementary particles?” In each case, answering the question requires the aggregation of large amounts of data from which to draw meaningful statistical inferences. This award will enable researchers to double the amount of data collected for analysis and investigations of these phenomena. It will enable preparations that will lead to future collection of about ten times the currently available data.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.