Speaker
Description
Many well-motivated scalar extensions of the Standard Model (SM) predict new, purely bosonic sources of CP violation (CPV). In previous work, we established that the correlated observation of carefully selected bosonic processes provides a simple yet powerful strategy to unambiguously reveal the presence of CP violation. Within the Complex Two-Higgs Doublet Model (C2HDM), combinations of vector-associated production, vector boson fusion, and gluon fusion were shown to furnish robust CPV signatures. Building on this foundation, the present study completes the proposed CPV search framework by incorporating the remaining class of purely gluon-fusion-induced signatures. We analyze gluon-fusion production of the SM-like Higgs boson and its additional exotic neutral counterparts, followed by decays into $VV$ and $VH_i$ final states. By systematically exploring these channels across the different Yukawa realizations of the C2HDM, we provide a comprehensive and structurally complete assessment of bosonic CPV probes relevant for the HL-LHC.