Speaker
Marco Menen
(TU Dortmund)
Description
The top quark is well suited for precision tests of the Standard Model and also provides a unique window into physics beyond the SM, especially via probing of its spin state. Its spin information is encoded in its decay products and is needed for the construction of genuine CP-odd observables, making an accurate polarization reconstruction essential. In this work, we employ L-GATr to study the reconstruction of hadronic top quark polarization and examine CP violation in ditop production. By tagging down-type quarks, we achieve a hadronic spin analyzing power of 0.72. Furthermore, we demonstrate that L-GATr can be used to separate the CP-even and CP-odd information in a CP-violating process and apply it to the ditop production process.