Accurate predictions for the production of heavy particles at the Large Hadron Collider

准确预测大型强子对撞机重粒子的产生

• 批准号: EP/X021416/1
• 负责人: Andrea Banfi
• 金额: $ 26万
• 依托单位: University of Sussex
• 依托单位国家: 英国
• 项目类别: Fellowship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FX021416%2F1
• 关键词: Accurate; predictions; production; heavy; particles

The proposal involves making precise predictions for the outcome of experiments at the Large Hadron Collider. Specifically, it involves constructing a simulation of the production of pairs of heavy particles called top-quarks, at state-of-the-art accuracy. Accurate predictions for processes such as this are needed in order to compare our best theories of nature with experimental results. This will allow any deviations from the known physics of the Standard Model (SM) to be detected and potentially allow new particles to be identified. It will also allow properties of the SM to be measured with increased precision. The top-quark is particularly important, since it couples strongly to the Higgs boson - it therefore provides a route to exploring the Higgs sector. In addition, the top-quark and the Higgs boson together play important roles in determining the stability of our universe.The objectives of the proposal are broadly to create flexible tools which can provide predictions at state-of-the-art accuracy for processes involving top-quarks at the LHC. This involves writing computer programs called event generators, which can simulate the outcomes of proton collisions. The proposed action will first consider the case in which a pair of top-quarks are produced in the collision. The resulting simulations will then be used to extract important SM properties, such as the top-quark mass and the strong coupling constant. The action will then consider the more complicated case in which a pair of top-quarks are produced alongside another particle such as a Higgs boson.The outcome of the project will be a set of publicly available tools to produce precision simulations of these processes. These will be used by other researchers working in particle theory and experiment in order to make comparison with data, constrain possibleBeyond the Standard Model theories and, hopefully, discover signs of new physics.

该提案涉及对大型强子对撞机的实验结果进行精确预测。具体而言，它涉及在最先进的准确性下构建对被称为顶级夸克的重粒子的产生的模拟。为了将我们的最佳自然理论与实验结果进行比较，需要对诸如此类的过程进行准确的预测。这将允许检测到已知的标准模型（SM）物理学的任何偏差，并可能允许识别新粒子。它还将允许以提高精度测量SM的属性。顶级Quark尤其重要，因为它与Higgs Boson紧密相结合 - 因此，它为探索Higgs行业提供了途径。此外，Top-Quark和Higgs Boson共同在确定宇宙的稳定性方面起着重要作用。该提案的目标广泛地创建了灵活的工具，这些工具可以在最新的PROCESS中提供涉及LHC顶级Quarks的流程的预测。这涉及编写称为事件生成器的计算机程序，该程序可以模拟质子碰撞的结果。拟议的行动将首先考虑碰撞中产生一对顶夸克的情况。然后，所得的模拟将用于提取重要的SM特性，例如Top-Quark质量和强耦合常数。然后，该动作将考虑更复杂的情况，其中一对顶夸克与另一个粒子（例如希格斯玻色子）一起生产。这些将由其他从事粒子理论和实验的研究人员使用，以与数据进行比较，限制可能的标准模型理论，并希望发现新物理学的迹象。

项目成果

Double Higgs production at NNLO interfaced to parton showers in GENEVA

• DOI: 10.1007/jhep06(2023)205
• 发表时间: 2022-12
• 期刊: Journal of High Energy Physics
• 影响因子: 5.4
• 作者: S. Alioli;Georgios Billis;A. Broggio;A. Gavardi;S. Kallweit;M. Lim;Giulia Marinelli;R. Nagar;D. Napoletano

Constraining the top-quark mass within the global MSHT PDF fit

• DOI: 10.1140/epjc/s10052-023-11961-6
• 发表时间: 2023-06
• 期刊: The European Physical Journal C
• 作者: T. Cridge;M. Lim