Physics at the Large Hadron Collider: Understanding Fundamental Interactions and Upgrading the CMS Experiment

大型强子对撞机的物理学：了解基本相互作用并升级 CMS 实验

• 批准号: 2209764
• 负责人: Ilya Kravchenko
• 金额: $ 180万
• 依托单位: University of Nebraska-Lincoln
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-09-01 至 2025-08-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2209764&HistoricalAwards=false
• 关键词: Physics; Large; Hadron; Collider; Understanding

This program of research aims to better understand the Universe at the smallest scales by probing nature's basic symmetries and their relation to the origin of mass. The 2012 discovery of a Higgs boson serves as both the crowning achievement of the standard model of particle physics and a hint beyond it - how can a light Higgs boson possibly survive huge, destabilizing quantum effects without new, undiscovered physics? Further, dark matter is known to exist from astronomical observations; however, the particle properties of dark matter remain shrouded in mystery. The combined activities of the University of Nebraska at Lincoln (UNL) group address such basic questions puzzling science - the origin of mass and the particle nature of dark matter - and have the potential for surprising discoveries that may change the way we understand our physical world. This award will provide support for the UNL group's work on the CMS experiment at the Large Hadron Collider (LHC) at CERN, a particle physics laboratory in Geneva, Switzerland. The group has a broad range of physics interests, with ongoing and planned measurements of Higgs physics, top production and decay, electroweak physics, plus searches for new phenomena. The group provides leadership to the experiment in software and computing, and UNL operates a Tier-2 computing center for CMS. Technically, the UNL group is contributing significantly to the upgrades of the CMS experiment for its operation in the very high-rate collision environments foreseen in the next decade at the LHC. Central to their efforts is the construction of parts of the Forward Pixel Detector of the CMS Inner Tracker. This detector system is critical to the reconstruction of many event types of special interest to the CMS program of discovery science. The UNL group leads the distinctive Cosmic Ray Observatory Project (CROP) outreach program. High school-based cosmic-ray research teams around Nebraska study extensive air showers with student- built and operated detectors, and future expansion will focus on under-served rural populations. The ongoing CROP initiative has served as a model for similar high-school cosmic-ray efforts across the U.S., Canada, and abroad.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.

该研究计划旨在通过探测自然的基本对称性及其与质量起源的关系来更好地理解最小尺度的宇宙。 2012年对希格斯玻色子的发现既是标准粒子物理学的标准模型的冠冕成就，又是其超出其范围的提示 - 光希格斯玻色子如何在没有新的，未发现的物理学的情况下生存巨大的，破坏稳定的量子效应？此外，已知暗物质存在于天文观测中。但是，暗物质的粒子特性仍然笼罩在神秘中。内布拉斯加州大学林肯大学（UNL）的联合活动解决了令人困惑的科学的基本问题 - 质量的起源和暗物质的粒子本质 - 并具有令人惊讶的发现的潜力，这些发现可能会改变我们理解我们物理世界的方式。该奖项将为瑞士日内瓦粒子物理实验室CERN的大型强子对撞机（LHC）的CMS实验的工作提供支持。该小组具有广泛的物理兴趣，并进行了持续的和计划的Higgs物理学，顶级生产和衰减，Electroweak Physics以及搜索新现象。该小组在软件和计算方面为实验提供领导力，并且不使用CMS的级计算中心。从技术上讲，UNL组在CMS实验的升级中为其在LHC的未来十年预见的非常高速碰撞环境中的运行中做出了重大贡献。他们努力的核心是构建CMS内部跟踪器的前向像素探测器的部分。该探测器系统对于发现科学CMS计划的许多事件类型的重建至关重要。 UNL小组领导着独特的宇宙射线天文台项目（作物）外展计划。内布拉斯加州周围的高中宇宙射线研究团队研究了大量的空中淋浴，建造和操作探测器，未来的扩张将集中在服务不足的农村人群上。持续的作物倡议是在美国，加拿大和国外的类似高中宇宙射线努力的模型。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子和更广泛影响的评估评估的评估来支持的。

项目成果

Combination of inclusive top-quark pair production cross-section measurements using ATLAS and CMS data at $$ \sqrt{s} $$ = 7 and 8 TeV

使用 ATLAS 和 CMS 数据在 $$ sqrt{s} $$ = 7 和 8 TeV 处进行包含性顶夸克对产生横截面测量的组合

• DOI: 10.1007/jhep07(2023)213
• 发表时间: 2023
• 期刊: Journal of High Energy Physics
• 影响因子: 5.4
• 作者: Aad, G.;Abbott, B.;Abbott, D. C.;Abed Abud, A.;Abeling, K.;Abhayasinghe, D. K.;Abidi, S. H.;Aboulhorma, A.;Abramowicz, H.;Abreu, H.
• 通讯作者: Abreu, H.