Searching for new physics in top-quark events with the ATLAS experiment at the LHC and parallel processing in the ATLAS trigger.

通过大型强子对撞机上的 ATLAS 实验和 ATLAS 触发器中的并行处理来寻找顶夸克事件中的新物理现象。

• 批准号: 2604949
• 金额: --
• 依托单位: University of Glasgow
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2604949
• 关键词: Searching; new; physics; top; quark

The top-quark is the heaviest fundamental particle observed to date. It plays a crucial role in many beyond the Standard Model (SM) theories and new physics could appear as subtle deviations from the SM predictions. The high energy and luminosity of the Large Hadron Collider (LHC) result in a large production cross-section for top-quark pair production and hence offers the possibility for precision measurements of the top quark. The first aim of this project is to use the run-2 and run-3 data collected by the ATLAS experiment to make precision measurements of the top quark. The student will apply novel techniques to reduce the systematic uncertainties, which typically limit the precision of many measurements. The measurements will be interpreted using Effective Field Theory and any deviation from the SM would be a milestone in the field.The successfully collection of data with the ATLAS experiment at the LHC relies on the operation of the trigger system. The development of modern computing architectures to have many processing cores and less memory per core means that in the future it will be essential to be able to run highly parallel algorithms in the ATLAS trigger system. The second aim of the project is to explore the potential of such algorithms in the muon trigger for the upgraded ATLAS trigger system that will be deployed for the high luminosity LHC upgrade.The project is aligned with STFCs goal for "World Class Research" and fits within the STFC theme for data-intensive science. The research will be done in collaboration with other members of the ATLAS collaboration.

顶夸克是迄今为止观察到的最重的基本粒子。它在标准模型 (SM) 理论之外的许多理论中发挥着至关重要的作用，新物理学可能会与 SM 预测出现微妙的偏差。大型强子对撞机（LHC）的高能量和高光度为顶夸克对的产生提供了大的生产截面，从而为顶夸克的精确测量提供了可能性。该项目的首要目标是利用ATLAS实验收集的run-2和run-3数据对顶夸克进行精确测量。学生将应用新技术来减少系统不确定性，这些不确定性通常会限制许多测量的精度。测量结果将使用有效场论进行解释，任何与 SM 的偏差都将成为该领域的里程碑。大型强子对撞机 ATLAS 实验数据的成功收集依赖于触发系统的运行。现代计算架构的发展具有更多的处理核心和更少的每个核心内存，这意味着未来能够在 ATLAS 触发系统中运行高度并行的算法将至关重要。该项目的第二个目标是探索此类算法在升级后的 ATLAS 触发系统的 μ 子触发器中的潜力，该系统将用于高光度 LHC 升级。该项目与 STFC 的“世界级研究”目标一致，适合STFC 数据密集型科学主题。该研究将与 ATLAS 合作组织的其他成员合作完成。