RUI: Searches for New Physics with the CMS Detector at the LHC

RUI：利用 LHC 的 CMS 探测器寻找新物理

• 批准号: 1913923
• 负责人: Matthew Bellis
• 金额: $ 20.12万
• 依托单位: Siena College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2019
• 资助国家: 美国
• 起止时间: 2019-07-01 至 2024-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1913923&HistoricalAwards=false
• 关键词: RUI; Searches; New; Physics; CMS

This is a project by Siena College to carry out fundamental research with the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider, at the CERN laboratory in Geneva, Switzerland. The Siena group participates in the experiment through an association with the Cornell University high-energy physics group. Siena undergraduates contribute to physics analyses that probe some of the most fundamental questions in physics. The group has contributed to a measurement of the differential cross section for production of high momentum top/antitop quark pairs, supported the CMS data preservation efforts with brand new educational tools, restarted an effort to search for baryon-number violating (BNV) decays of the top quark, and engaged local high school teachers and their students to teach them about this exciting work. The group now leads efforts to search for BNV decays of the top quark with Run II data, developing novel approaches along the way. New efforts in data preservation and speculative dark matter searches are also part of this project. Siena will continue this effort primarily to use these data for education, outreach, and training.The observed matter/antimatter asymmetry in the universe is 8 orders of magnitude larger than can be accommodated by the combination CP violation in the quark sector and baryon-number violating processes allowed in the Standard Model. The most striking consequence of this would be proton decay, but extensive searches for this process have yielded no signal. If BNV is mediated by a boson that operates through a more complicated flavor/generation structure, then it may manifest more strongly in higher generation quarks and leptons. The Siena group will expand the search for BNV decays of the top quark, any observation of which would transform particle physics. The nature of dark matter is one of the most significant outstanding questions in physics and a key missing element of the Standard Model. The Siena group will carry out new speculative dark matter searches in which the CMS detector is used in a direct detection mode, looking for large deposits of energy not associated with a bunch crossing, and in indirect detection mode, searching for standard model particles pointing up from the ground and originating from the decay of dark matter particles gravitationally trapped in the Earth.Through this project, Siena College students have the opportunity to contribute to physics analyses and to present their work at conferences and carry out their research at major world laboratories. These efforts will focus on both exciting the general public about what humanity is learning about Nature and how the Universe works, but also on encouraging young people to consider careers in STEM fields. The Siena group emphasizes reaching out to women and other traditionally underrepresented groups in physics in local high schools.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.

这是锡耶纳学院的一个项目，旨在利用瑞士日内瓦欧洲核子研究中心实验室大型强子对撞机上的紧凑型介子螺线管 (CMS) 实验开展基础研究。锡耶纳小组通过与康奈尔大学高能物理小组的合作参与了该实验。锡耶纳的本科生致力于物理学分析，探讨物理学中一些最基本的问题。该小组为测量高动量顶/反顶夸克对的微分截面做出了贡献，用全新的教育工具支持 CMS 数据保存工作，重新开始寻找重子数破缺 (BNV) 衰变的努力顶夸克，并聘请当地高中教师和他们的学生来向他们传授这项令人兴奋的工作。该小组目前正在领导利用 Run II 数据寻找顶夸克 BNV 衰变的工作，并在此过程中开发新方法。数据保存和推测性暗物质搜索方面的新努力也是该项目的一部分。锡耶纳将继续这项工作，主要将这些数据用于教育、推广和培训。观测到的宇宙中物质/反物质不对称性比夸克扇区和重子数的 CP 破坏组合所能容纳的要大 8 个数量级违反标准模型中允许的流程。最显着的后果是质子衰变，但对这一过程的广泛搜索并未产生任何信号。如果 BNV 是由通过更复杂的味道/生成结构运作的玻色子介导的，那么它可能在更高代的夸克和轻子中表现得更强烈。锡耶纳小组将扩大对顶夸克 BNV 衰变的搜索范围，任何对顶夸克衰变的观察都将改变粒子物理学。暗物质的性质是物理学中最重要的悬而未决的问题之一，也是标准模型中一个关键的缺失元素。锡耶纳小组将进行新的推测性暗物质搜索，其中 CMS 探测器用于直接检测模式，寻找与束交叉无关的大量能量沉积，并在间接检测模式下，搜索指向上方的标准模型粒子来自地面，源自地球引力所困的暗物质粒子的衰变。通过这个项目，锡耶纳学院的学生有机会为物理分析做出贡献，并在会议上展示他们的工作，并在世界主要实验室进行研究。这些努力的重点是让公众了解人类对自然的了解以及宇宙如何运作，同时鼓励年轻人考虑 STEM 领域的职业。锡耶纳小组强调在当地高中的物理领域接触女性和其他传统上代表性不足的群体。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力优点和更广泛的影响审查标准进行评估，被认为值得支持。