2020/06/29 by Wei Chao, Chao, Wei, Yu Gao +4 · 16 citations
Physics and Astronomy · #Astrophysics #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Dirac (video compression format) #Particle physics #Physics #Stellar, planetary, and galactic studies #hep-ph
paper · pdf · doi:10.48550/arxiv.2006.16145
published in arXiv (Cornell University) (Cornell University) · 9 pagers, 3 figures
arxiv created 2020/06/29 · openalex publication_date 2020/06/29 · arxiv updated 2020/06/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
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.