Investigations in Proton-Proton Collisions at the Large Hadron Collider

大型强子对撞机质子-质子碰撞的研究

• 批准号: 2012165
• 负责人: Joey Huston
• 金额: $ 222万
• 依托单位: Michigan State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-08-01 至 2024-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2012165&HistoricalAwards=false
• 关键词: Investigations; Proton; Collisions; Large; Hadron

One of the major intellectual achievements of the 20th century was the development of the Standard Model (SM) of particle physics. This model succeeded in classifying all the elementary particles known at the time into a hierarchy of groups having similar quantum properties. The validity of this model to date was confirmed by the discovery of the Higgs boson at the Large Hadron Collider (LHC). However, the Standard Model as it currently exists leaves open many questions about the universe, including such fundamental questions as to why the Higgs mass has the value it has. One of the goals of the ATLAS experiment at the Large Hadron Collider which remains the premier Energy Frontier particle accelerator, operating at the CERN laboratory near Geneva Switzerland, is to discover new physics Beyond the Standard Model (BSM). This award will contribute to the potential discoveries of BSM in three main categories: 1) maintain the on-going operations of the ATLAS detector including trigger and calorimeter systems, 2) contribute physics analysis to both Standard Model physics (so we can recognize BSM physics) and searches for new particles which directly reveal BSM physics, 3) contribute to education and outreach efforts to explain BSM physics to non-scientists including elementary students.This award to the Michigan State University group targets physics studies under four general categories: the search for new vector bosons; the study of Higgs boson production and decay; the physics of top quarks, singly and in pairs; and the study of the strong interactions, especially jet production in association with vector bosons and heavy quarks. The group will complete work on the Tile Calorimeter Phase I upgrade which is nearing completion at CERN now. Similarly work on the Trigger for the level 1 Calorimeter envisioned for the Phase I upgrade will be completed in the first year of this award. The longer-term hardware work will be on the HL-LHC upgrade for the Tile Calorimeter, taking place over the next five years. Members of the MSU high energy physics group have traditionally had a strong involvement in education and outreach, and the group has been especially innovative in informal education. A notable element of these activities has been the development of a planetarium show on the ATLAS experiment at the Large Hadron Collider (LHC). In collaboration with other US groups on the ATLAS experiment, the group has also just developed a major planetarium production on dark matter.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.

世纪的主要学术成就之一是粒子物理学标准模型（SM）的发展。这个模型成功地将当时已知的所有基本粒子分类为具有类似量子性质的层次结构。到目前为止，这个模型的有效性被大型强子对撞机（LHC）发现的希格斯玻色子所证实。然而，目前存在的标准模型留下了许多关于宇宙的问题，包括为什么希格斯质量具有它的价值等基本问题。大型强子对撞机仍然是首屈一指的能源前沿粒子加速器，在瑞士日内瓦附近的欧洲核子研究中心实验室运行，ATLAS实验的目标之一是发现超越标准模型（BSM）的新物理。该奖项将有助于BSM在三个主要类别中的潜在发现：1）维持ATLAS探测器的持续运行，包括触发器和量热计系统，2）为标准模型物理和（因此我们可以识别BSM物理）并寻找直接揭示BSM物理的新粒子，3）为教育和推广工作做出贡献，向包括小学生在内的非科学家解释BSM物理学。密歇根州立大学小组的这一奖项将物理学研究分为四个大类：寻找新的矢量玻色子;希格斯玻色子的产生和衰变的研究;顶夸克的物理学，单独和成对;和强相互作用的研究，特别是与矢量玻色子和重夸克相关的喷流产生。该小组将完成瓷砖热量计第一阶段的升级工作，该升级工作目前已在CERN接近完成。同样，第一阶段升级设想的1级热量计触发器的工作将在本合同的第一年完成。长期的硬件工作将是在未来五年内为瓦热量计进行HL-LHC升级。密歇根州立大学高能物理组的成员传统上有很强的参与教育和推广，该集团一直在非正式教育特别创新。这些活动的一个值得注意的部分是在大型强子对撞机的ATLAS实验上开发了一个天文馆展览。在ATLAS实验中，该小组与其他美国团体合作，刚刚开发了一个关于暗物质的主要天文馆产品。该奖项反映了NSF的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

项目成果

Measurement of the tt¯ production cross-section in the lepton+jets channel at s=13 TeV with the ATLAS experiment

使用 ATLAS 实验测量 s=13 TeV 轻子射流通道中的 tt 产生横截面

• DOI: 10.1016/j.physletb.2020.135797
• 发表时间: 2020
• 期刊: Physics Letters B
• 影响因子: 4.4
• 作者: Aad, G.;Abbott, B.;Abbott, D.C.;Abed Abud, A.;Abeling, K.;Abhayasinghe, D.K.;Abidi, S.H.;AbouZeid, O.S.;Abraham, N.L.;Abramowicz, H.
• 通讯作者: Abramowicz, H.