Measurement of the ttW and ttZ differential cross sections in proton proton collisions at 13 TeV with the ATLAS detector

该项目将利用ATLAS探测器收集的全部13TeV数据集，测量与Z或W玻色子有关的顶夸克对的微分产生截面。到目前为止，对与矢量玻色子相关的TT事件产生的微分截面测量从未被测量过。不仅测量本身是有趣和重要的，而且它还是一个有用的工具，可以用来搜索可能由于超出标准模型(BSM)效应而导致的与标准模型(SM)预测的偏差。任何由BSM效应引起的SM偏差都可以使用SM有效场论(SMEFT)的框架，以模型无关的方式进行参数化。

This project will measure the differential production cross sections of a top-quark pair in association with a Z or W boson using the full 13 TeV dataset collected by the ATLAS detector. The differential cross section measurement of the associated production of tt events with a vector boson has, to date, never been measured. Not only is the measurement interesting and important to make in its own right, it is a useful tool to search for deviations from Standard Model (SM) predictions which could be due to Beyond the Standard Model (BSM) effects. Any deviations from the SM due to BSM effects can be parameterised in a model independent way using the framework of the SM Effective Field Theory (SMEFT).