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

Understand

We present an extension of the JHUGen and MELA framework, which includes an event generator and library for the matrix element analysis.

• It enables simulation, optimal discrimination, reweighting techniques, and analysis of a bosonic resonance and the triple and quartic gauge boson interactions with the most general anomalous couplings.
• The new features, which become especially relevant at the current stage of LHC data taking, are the simulation of gluon fusion and vector boson fusion in the off-shell region, associated $ZH$ production at NLO QCD including the $gg$ initial state, and the simulation of a second spin-zero resonance.
• We also quote translations of the anomalous coupling measurements into constraints on dimension-six operators of an effective field theory.