Operator Analysis of New Physics in Top-Quark Observables (B2b)

由于精确的预测和测量，顶夸克观测是寻找新物理学小效应的一个有希望的地方。在这个项目中，我们在有效场论的框架内对顶级观测量中的新物理进行了全局分析。我们在QCD中计算LHC过程，例如顶对顶生产或电弱单顶生产，以获得下一个领先订单，并对LHC数据进行全面拟合。味观测值与高灵敏度的虚顶夸克，然后结合高能量的观测值，假设一个特定的味结构的有效耦合。我们还调查希格斯和电弱观测探测顶夸克相互作用直接或通过量子效应。我们的全局分析使我们能够确定新的搜索方向，并可能通过几个小偏差的相关性发现新的物理。

Top-quark observables are a promising place to search for small effects of new physics, thanks to precise predictions and measurements. In this project, we perform a global analysis of new physics in top observables in the framework of an effective field theory. We calculate LHC processes such as top-antitop production or electroweak single-top production to next-to-leading order in QCD and perform a comprehensive fit to LHC data. Flavor observables with a high sensitivity to virtual top-quarks are then combined with high-energy observables, assuming a specific flavor structure of the effective couplings. We also investigate Higgs and electroweak observables that probe top-quark interactions directly or through quantum effects. Our global analysis allows us to identify new search directions and to possibly discover new physics through correlations of several small deviations.