Author(s): E. Aprile et al. (XENON Collaboration) We report on a search for sub-GeV dark matter upscattered via the solar reflection mechanism in the heavy mediator scenario. Under the standard halo model, keV–MeV dark matter produces nuclear recoils with energies below the detection threshold of liquid xenon time projection chambers. We enhance se… [Phys. Rev. Lett. 137, 121001] Published Mon Sep 14, 2026