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。具体来说，它涉及构建一个模拟生产的重粒子对称为顶夸克，在国家的最先进的精度。为了将我们最好的自然理论与实验结果进行比较，需要对这类过程进行准确的预测。这将允许检测到与标准模型（SM）已知物理学的任何偏差，并可能允许识别新粒子。它还将允许以更高的精度测量SM的特性。顶夸克特别重要，因为它与希格斯玻色子强烈耦合-因此它提供了探索希格斯扇区的途径。此外，顶夸克和希格斯玻色子在决定我们宇宙的稳定性方面起着重要作用。该提案的目标是创造灵活的工具，可以在LHC中以最先进的精度预测涉及顶夸克的过程。这涉及到编写称为事件发生器的计算机程序，它可以模拟质子碰撞的结果。建议的行动将首先考虑在碰撞中产生一对顶夸克的情况。由此产生的模拟将被用来提取重要的SM属性，如顶夸克质量和强耦合常数。然后，该行动将考虑更复杂的情况，即一对顶夸克与另一种粒子（如希格斯玻色子）一起产生。该项目的成果将是一套公开可用的工具，用于对这些过程进行精确模拟。这些将被其他研究人员用于粒子理论和实验，以便与数据进行比较，约束可能的超越标准模型的理论，并希望发现新物理学的迹象。

项目成果

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

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