An interesting model of dark matter involves a hidden sector decoupled from Standard Model (SM) fields except for some portal interaction. A concrete realization of this is the Hidden Abelian Higgs Model, which gives rise to decays of the SM Higgs boson into a pair of new bosons, called Zd or dark photons.
In this talk I will present our recent prospects for the search for such dark photons at the ILC with √s=250 GeV and assuming prompt decays of the dark photons.