Speaker
Description
Understanding how effective interactions affect individual amplitudes and their interference can help interpret deviations from Standard Model predictions. In this poster, we study these effects in Zh production accompanied by neutrinos at future TeV-scale lepton colliders within the Standard Model Effective Field Theory (SMEFT). We use the Feynman-Diagram (FD) gauge to organize the amplitude contributions in terms of scattering mechanisms and gauge-Higgs interaction vertices, and examine how they are modified by dimension-six operators. We also explore the kinematic dependence of these modifications, with the aim of finding observables and phase-space regions sensitive to the Wilson coefficients. Through this analysis, we discuss the connection between changes in kinematic distributions and the interactions responsible for them.