Search for Dark Photons Utilizing Advanced Germanium Detectors

We prospect the possibility of using advanced germanium (Ge) detectors to search for dark photons by means of absorption and conversion to electrons. A Ge detector utilizing internal charge amplification for the charge carriers created by the ionization of impurities is a novel technology with experimental sensitivity for detecting dark photons. We present the sensitivity of such a Ge experiment for detecting dark photons in the low-energy region. We show that, if Ge internal charge amplification technology becomes available, then a new opportunity arises to observe dark photons.