Probing the coupling between the top-quark and gauge bosons with the ATLAS experiment at the LHC

顶夸克是迄今为止观测到的最重的基本粒子。它在许多超越标准模型的理论中起着至关重要的作用，因此对顶夸克的精确测量对于探索标准模型的极限至关重要。大型强子对撞机（LHC）为ATLAS实验提供的大型数据集允许测量罕见的过程，例如与Z玻色子（ttZ）或希格斯玻色子（ttH）相关的顶夸克对产生。测量这些过程将检验顶夸克和规范玻色子之间的耦合是否符合粒子物理学的标准模型。本项目的目的是利用ATLAS实验收集的数据对ttZ和ttH过程进行详细的测量。学生将应用新的展开技术到大型ATLAS数据集，以测量过程的微分截面，然后将能够用于探索超越标准模型理论。该项目与STFC的“世界级研究”目标保持一致，并符合STFC的数据密集型科学主题。这项研究将与ATLAS合作的其他成员合作进行。

The top-quark is the heaviest fundamental particle observed to date. It plays a crucial role in many beyond the Standard Model theories and hence precision measurements of the top-quark are essential to probe the limits of the Standard Model. The large dataset provided by the Large Hadron Collider (LHC) to the ATLAS experiment allows to measure rare processes such as top-quark pair production in association with either the Z boson (ttZ) or the Higgs boson (ttH). Measuring these processes will test whether the couplings between the top-quark and the gauge bosons agrees with the Standard Model of particle physics. The aim of this project is use the data collected by the ATLAS experiment to make detailed measurements of the ttZ and ttH processes. The student will apply novel unfolding techniques to the large ATLAS datasets to measure the differential cross-section of the processes, which will then be able to be used to probe beyond the Standard Model theories. 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.