Dilepton signature ine+e−→Hl+l−

We calculate the lepton distribution in the reaction $e^{+}{e}^{-}\to \left(\mathrm{Higgs}\mathrm{boson}\right)+\left(\mathrm{dilepton}\right)$ mediated by a neutral gauge boson. Propagator effects favor a slow dilepton for which the study of the joint angular distribution of $l^{+}$ and $l^{-}$ is an attractive experimental possibility. This distribution is found to be a sensitive probe of the $\mathrm{ZZH}$ vertex.