The investigation and collider measurement of quantum information generated in elementary particle interactions have attracted growing interest in recent years. To date, most studies have focused on bipartite systems, for example, spin correlations in top-quark pair production, while the rich structure of multipartite quantum correlations remains largely unexplored in high-energy physics. In...
The t-channel singularity is a divergence in the scattering amplitude which occurs when a stable particle propagating in t-channel scattering process becomes an on-shell state. Such situations appear either in the system of collider experiments or in the context of the cosmological particle production. No scheme which is generally applicable is known. In this work, we propose a new formulation...
We study the sensitivities of the Future Circular Collider (FCC) under electron-positron collision and hadron-hadron collision scenarios for the search of Leptoquarks. In particular, we focus on the Z-factory mode and the high-pT mode. For the Z-factory mode, we summarize past analytical works on Z-boson decays introducing Leptoquarks at loop-level. For the high-pT mode, we update the current...
