Search for new phenomena in processes with top quark

顶夸克是已知最重的基本粒子。人们很自然地期望，超出标准模型的新力的影响强烈地依赖于相互作用的粒子的质量。因此，顶夸克过程的研究为寻找新的物理学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。她将利用顶夸克的衰变来检验标准模型的一个基本公理——轻子味普适性。ATLAS最近进行的第一次测量表明，在大型强子对撞机上进行这种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，并提高先前测量的精度。

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.