Dark matter and the XENON1T electron recoil excess

2020/06/30 by Kristjan Kannike, Martti Raidal, M. Raidal +4 · 2 citations
Physics and Astronomy · #Atomic and Subatomic Physics Research #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Nuclear physics #Physics #Recoil #astro-ph.CO #hep-ph

paper · pdf · doi:10.1103/physrevd.102.095002

published as Phys. Rev. D 102, 095002 (2020) · 5 pages, 3 figures, published version

openalex created_date 2020/06/25 · openalex publication_date 2020/11/06 · arxiv created 2020/11/09 · arxiv updated 2020/11/11 · openalex updated_date 2026/08/05

Abstract

We show that the electron recoil excess around 2 keV claimed by the Xenon Collaboration can be fitted by dark matter (DM) or DM-like particles having a fast component with velocity of order \ensuremath∼0.1. Those particles cannot be part of the cold DM halo of our Galaxy, so we speculate about their possible nature and origin, such as fast-moving DM subhalos, semiannihilations of DM and relativistic axions produced by a nearby axion star. Feasible new physics scenarios must accommodate exotic DM dynamics and unusual DM properties.

Citations

• Model independent bounds on magnetic moments of Majorana neutrinos
• Hidden vector dark matter
• Direct detection of sub-GeV dark matter
• Evidence for a Distant Giant Planet in the Solar System
• What if Planet 9 is a Primordial Black Hole?

Cited by

• Deep learning the astrometric signature of dark matter substructure
• Implications of the XENON1T excess on the dark matter interpretation