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We present an extension of the JHUGen and MELA framework, which includes anevent generator and library for the matrix element analysis. It enablessimulation, optimal discrimination, reweighting techniques, and analysis of abosonic resonance and the triple and quartic gauge boson interactions with themost general anomalous couplings. The new features, which become especiallyrelevant at the current stage of LHC data taking, are the simulation of gluonfusion and vector boson fusion in the off-shell region, associated $ZH$production at NLO QCD including the $gg$ initial state, and the simulation of asecond spin-zero resonance. We also quote translations of the anomalouscoupling measurements into constraints on dimension-six operators of aneffective field theory. Some of the new features are illustrated withprojections for experimental measurements with the full LHC and HL-LHCdatasets.

New features in the JHU generator framework: constraining Higgs boson properties from on-shell and off-shell production