Speaker
Description
We investigate how CP‑violating top–Higgs couplings could influence top‑quark pair production at the LHC. To study these effects, we construct the reduced spin density matrix of the $t \bar{t}$ final state and explore a broad class of observables, including those motivated by quantum‑information approaches to spin correlations. We make use of an automated framework that provides the reduced helicity density matrix for $gg,q\bar q \rightarrow t \bar t$ while incorporating the effects of both QCD and electroweak corrections. The phenomenological model we employ requires a careful treatment of renormalization in the on‑shell scheme. This setup offers a flexible platform for assessing how CP‑violating Yukawa structures manifest in the spin and correlation patterns of the top–antitop system and for exploring the potential of quantum‑information–motivated observables in hadronic environments.