Benchmark Suggestions for Resonant Double Higgs Production at the LHC for Extended Higgs Sectors

In this note we present benchmark scenarios for resonant double Higgs production at the $13\,$TeV LHC in the 2HDM+S model and the Z₃ Next-to-Minimal Supersymmetric Standard Model (NMSSM), which may be accessible with 300 fb⁻¹ of data. The NMSSM Higgs sector can be mapped onto the 2HDM+S. We show benchmark points and relevant parameter planes in the 2HDM+S for three sets of signatures: (A→ h₁₂₅ a, ~H→ h₁₂₅ h), (A→ a h, H→ hh, H→ aa), and (H→ h₁₂₅h₁₂₅). The first two signatures are optimized in what we call Z-Phobic scenarios where $H/A$ decays into final states with Z bosons are suppressed. The last signature, h₁₂₅ pair production, is directly proportional to the misalignment of h₁₂₅ with the interaction state sharing the couplings of a SM Higgs boson, and hence is presented in the Max Misalignment scenario. We also present two NMSSM benchmark points for the (A→ h₁₂₅ a, ~H→ h₁₂₅ h) signatures. The benchmark scenarios presented here are based on Refs. [1,2].