The Skipper CCD for low-energy threshold particle experiments above ground

We present experimental results using a single-electron resolution Skipper-CCD running above ground level to demonstrate the potential of this technology for its use in reactor neutrino observations and other low-energy particle interaction experiments. Operating conditions and event-selection criteria are provided to decouple most of the background rate at low energies. Our final results for events with energies as low as $5$ ionized electron-hole pairs show that the exponentially increasing rate of events seen in other technologies is not present in our data. This demonstrates that the Skipper CCD proves to be among the best options to measure low energy and weakly interacting particles at ground level.