Search for the Production of Four Top Quarks at CMS

在 CMS 中寻找四种顶夸克的产生

• 批准号: 2190929
• 金额: --
• 依托单位: University of Bristol
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2018
• 资助国家: 英国
• 起止时间: 2018 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2190929
• 关键词: Search; Production; Four; Top; Quarks

The student will search for the production of four top quarks at CMS. In the standard model, this process has a cross section of approximately one femtobarn. With over 100/fb of LHC Run 2 data on disk (half of which has not yet been analysed), CMS should now be sensitive to this very rare process. A similar amount of data is expected in the first year of Run 3 (2021) which effectively guarantees a discovery of the standard model process during the time period of this studentship. If, in contrast, the standard model prediction is excluded, it would be a clear sign physics beyond the standard model.The student will work with CMS collaborators, in Europe and elsewhere, to analyse the 2018 and 2021 data. They will perform simulations and data-driven techniques to evaluate the backgrounds and optimise the selection, and develop and improve deep machine learning techniques to enhance the signal significance. They will present their results at internal meetings and conferences, and play a leading role in writing one or more papers publishing the results.They will also spend a fraction of their time performing operational and other tasks for the CMS collaboration, including taking shifts and working on tracker simulations.

学生将在CMS中寻找四个顶夸克的产生。在标准模型中，该过程的横截面约为一个毫微微谷仓。磁盘上有超过100/fb的LHC运行2数据（其中一半尚未分析），CMS现在应该对这个非常罕见的过程敏感。预计在运行3的第一年（2021年）将获得类似数量的数据，这有效地保证了在此学生期间发现标准模型过程。相反，如果排除标准模型的预测，这将是一个明显的迹象物理超越标准模型。学生将与CMS合作者，在欧洲和其他地方，分析2018年和2021年的数据。他们将执行模拟和数据驱动技术，以评估背景和优化选择，并开发和改进深度机器学习技术，以提高信号的重要性。他们将在内部会议和研讨会上展示他们的成果，并在撰写一篇或多篇发表成果的论文中发挥主导作用。他们还将花费一小部分时间执行CMS协作的运营和其他任务，包括轮班和跟踪器模拟工作。