Search for lepton flavour violation with the first data of the mu3e experiment

μ子实验寻找一种罕见的味道，打破了μ子衰变为三个电子的过程。在标准模型中，衰减被高度抑制，任何对信号的观测都将是新物理学的先驱。该实验目前正在瑞士保罗-谢勒研究所（Paul-Scherrer Institute）进行国际合作，计划于2020年获得第一批数据。这篇博士论文将在利物浦mu3e小组内进行，该小组目前领导英国参与实验和mu3e跟踪器的建设。该小组还为实验软件框架的开发做出了贡献。论文的主题将集中在跟踪器的调试，对mu3e探测器性能的理解和对第一批数据的分析。除了对mu- bbbb3e衰变的第一个结果做出贡献外，该学生还将通过开发和优化GPU农场的软件来探索扩展实验物理潜力的可能性，以实时选择和分析mu- b>eex衰变，其中X是一个新的粒子，例如一个新的中性玻色子或暗光子。学生还将有机会利用轻子扇区和大型强子对撞机的其他实验结果探索对这些粒子的灵敏度之间的相互关系。

The mu3e experiment searches for a rare flavour violating decay of the muon to three electrons. The decay is highly suppressed in the standard model and any observation of signal will be a herald of new physics. The experiment is currently under construction in the Paul-Scherrer Institute in Switzerland by an international collaboration and is scheduled to take its very first data in 2020. This PhD thesis will take place within the Liverpool mu3e group, which currently leads the UK participation in the experiment and mu3e tracker construction. The group also contributes to the development of the experiment software framework. The thesis topic will focus on the commissioning of the tracker towards the first data taking, the understanding of the mu3e detector performance and the analysis of the very first data. In addition to contributing to the very first results on the mu->3e decay, the student will explore the possibility of expanding the experiment's physics potential by developing and optimizing software for the GPU farm to select and analyse in real time mu->eeeX decays, where X is a new particle, e.g. a new neutral boson or a dark photon. The student will also have the opportunity to explore the interconnections of the sensitivity to these particles with results from other experiments in the lepton sector and the LHC.