Speeding up dark matter with solar neutrinos

Abstract We present a novel mechanism of using solar neutrinos to speed up dark matter, inspired by the fact that are most energetic particles from Sun with well-understood spectrum. In neutrino portal sector model, we show matter sub-GeV mass could be accelerated pp velocities well above 10−3c and capable depositing large enough energy at direct detection experiments. A crucial ingredient this is dissociation stable bound states exist in nature. The resulting velocity distribution bears strong resemblance shape As an application, derive leading limit on light interaction reinterpreting recent PICO experiment result.