Speaker
Description
Abstract
The FCC-ee at √s = 365 GeV provides a better environment to study Higgs boson production with high precision. This study focuses on single Higgs production via vector-boson fusion (VBF) and associated production (ZH), followed by its Η → WW → 2 l + MET decay. Using MadGraph5, event generation was performed for e⁺ e⁻ → νl νl~ H and e⁺ e⁻ → Z H. Parton-level events were hadronized with Pythia8, detector effects were simulated using Delphes, and final-state observables were analyzed via ExRootAnalysis. Histograms for missing transverse energy (MET), invariant mass (m(ll)), and transverse momentum (pT(l)) were constructed. Background contributions from ZZ, WW, l+ l- (l:e,μ), and τ+ τ- were systematically studied, and optimized kinematic cuts were applied to enhance signal extraction. The results indicate that FCC-ee provides a highly controlled environment to probe Higgs boson couplings with electroweak gauge bosons. This study contributes to the precise determination of the Higgs coupling constants gHWW and gHZZ, which play a critical role in testing the Standard Model (SM) predictions and exploring possible deviations that could hint at new physics.
Keywords: Higgs boson, Vector boson, Couplings, FCC, Lepton collider
