The XENON1T dark matter experiment recently reported 0.65 ton-year exposure measurement on electron recoils , which shows an excess in 2∼3 KeV recoils above the detector background. In this paper we present a Pseudo-Dirac dark matter scenario to explain the excess via inelastic dark matter-electron scattering. With a KeV scale mass splitting between the two components of the Pseudo-Dirac dark matter, the slightly excited component can down-scatter on electrons. The desired dark matter masses are about 10 GeV with a 4 KeV mass-splitting and unity coupling to electrons, which generate the observed XENON1T recoil events, give the appropriate dark matter relic abundance and satisfy collider search limits.
@article{arxiv.2006.16145,
title = {Pseudo-Dirac Dark Matter in XENON1T},
author = {Wei Chao and Yu Gao and Ming jie Jin},
journal= {arXiv preprint arXiv:2006.16145},
year = {2020}
}