Sensitivity to Higgs Pseudo-Observables in ZH Production at NLO QCD

We study the sensitivity of the associated Higgs production process $pp\to ZH$ to anomalous Higgs couplings within the Effective Field Theory framework. Event samples are generated using $\text{MadGraph5\_aMC@NLO}$ at $\sqrt{s}=13$ TeV using the UFO model HPO_ewk_prod_NLO, and analyzed using a dedicated Python analysis of HepMC events. We investigate several kinematic observables and derive constraints on the EFT parameter ${\epsilon }_{ZZ}$ using a ${\chi }^2$ statistical analysis. A 95% confidence level interval $-0.026<{\epsilon }_{ZZ}<0.383$ is obtained from the simulated data.