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arXiv · 2006.10735

Dark Matter and the XENON1T electron recoil excess

Kristjan Kannike·Martti Raidal·Hardi Veermäe·Alessandro Strumia·Daniele Teresi
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Abstract

We show that the electron recoil excess around 2 keV claimed by the Xenon collaboration can be fitted by DM or DM-like particles having a fast component with velocity of order $\sim 0.1$. 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 sub-haloes, semi-annihilations of DM and relativistic axions produced by a nearby axion star. Feasible new physics scenarios must accommodate exotic DM dynamics and unusual DM properties.

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Kristjan Kannike, Martti Raidal, Hardi Veermäe, Alessandro Strumia, Daniele Teresi. 2020-06-18. Dark Matter and the XENON1T electron recoil excess. https://doi.org/10.1103/physrevd.102.095002

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