Higgs-boson production in association with a Dark Photon in $e^{+}{e}^{-}$ collisions

Sanjoy Biswas, Emidio Gabrielli, Matti Heikinheimo +1

We study the production of a Higgs boson recoiling from a massless invisible system in $e^{+}{e}^{-}$ collisions. This is a quite distinctive signature that can arise when the Higgs b…