Search for new phenomena in processes with top quark

顶夸克是已知最重的基本粒子。人们很自然地认为，标准模型之外的新作用力的影响很大程度上取决于相互作用粒子的质量。因此，对顶夸克过程的研究为探索新物理提供了一个极好的机会。艾玛马歇尔的项目将利用这种可能性。她将测试标准模型的基本公理之一，轻子味普适性，使用顶夸克的衰变。ATLAS最近进行的第一次测量表明，在LHC上进行的这项测试可以达到很高的精度。Emma的任务将包括在顶夸克衰变的新通道中进行测量，并提高以前测量的精度。

Top quark is the heaviest known elementary particle. It is natural to expect that effects of new forces beyond the Standard Model strongly depend on the mass of interacting particles. Therefore, the study of processes with top quark offers an excellent opportunity of searching for new physics. The project of Emma Marshall will exploit this possibility. She will test one of the fundamental axioms of the Standard Model, lepton flavour universality, using the decays of the top quark. The first measurement recently performed by ATLAS demonstrated that this test at the LHC could achieve a high precision. The task of Emma will include performing the measurement in a new channel of top-quark decay and improving the precision of the previous measurement.