Dark Matter and the XENON1T electron recoil excess

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.

5 pages, 3 figures, published version

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• Excess Electronic Recoil Events in XENON1T
• Stellar Recipes for Axion Hunters
• Revisiting the axion bounds from the Galactic white dwarf luminosity function
• The Planet Nine Hypothesis
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• Co-SIMP Miracle
• Minimal semi-annihilating ${\mathbb{Z}}_N$ scalar dark matter
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• Exploring New Physics with O(keV) Electron Recoils in Direct Detection Experiments
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• Linear cosmological constraints on 2-body decaying dark matter scenarios and the $S_8$ tension
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• Boosted dark matter from diffuse supernova neutrinos
• Electric But Not Eclectic: Thermal Relic Dark Matter for the XENON1T Excess
• Unveiling Hidden Physics at the LHC
• Could the 2.6 $M_{\odot }$ object in GW190814 be a primordial black hole?
• Prospects of Migdal Effect in the Explanation of XENON1T Electron Recoil Excess
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• Gravitational Production of Hidden Photon Dark Matter in Light of the XENON1T Excess
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• Global fits of axion-like particles to XENON1T and astrophysical data
• XENON1T Anomaly: A Light $Z^{\prime }$
• Boosted Neutrinos and Relativistic Dark Particles as Messengers from Reheating
• An Active-to-Sterile Neutrino Transition Dipole Moment and the XENON1T Excess
• Shining dark matter in Xenon1T
• Probing the relaxed relaxion and Higgs-portal with S1 & S2
• Exothermic Dark Matter for XENON1T Excess
• Self-interacting Inelastic Dark Matter in the light of XENON1T excess
• Solar Neutrino Scattering with Electron into Massive Sterile Neutrino
• Xenon1T excess from electron recoils of non-relativistic Dark Matter
• Sun Heated MeV-scale Dark Matter and the XENON1T Electron Recoil Excess
• Implications of the XENON1T Excess on the Dark Matter Interpretation
• Shedding New Light on Sterile Neutrinos from XENON1T Experiment
• Constraints on general neutrino interactions with exotic fermion from neutrino-electron scattering experiments
• Filtered asymmetric dark matter during the Peccei-Quinn phase transition
• Dark Matter, Muon Anomalous Magnetic Moment and the XENON1T Excess
• Impact of loop-induced processes on the boosted dark matter interpretation of the XENON1T excess
• Constraints on electron-scattering interpretation of XENON1T excess
• XENON1T Excess: Some Possible Backgrounds
• The Spectrum of Dark Radiation as a Probe of Reheating
• Canonical seesaw implication for two-component dark matter
• EFT Approach of Inelastic Dark Matter for Xenon Electron Recoil Detection
• Boosted Self-Interacting Dark Matter and XENON1T Excess
• Decoding Dark Matter Substructure without Supervision
• Energy-dependent Boosted Dark Matter from Diffuse Supernova Neutrino Background
• EFT Interpretation of XENON1T Electron Recoil Excess: Neutrinos and Dark Matter
• An Attractive Scenario for Light Dark Matter Direct Detection
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• Deep learning the astrometric signature of dark matter substructure
• Halo-Independent Analysis of Direct Dark Matter Detection Through Electron Scattering
• Earth Shielding and Daily Modulation from Electrophilic Boosted Dark Particles
• GeV Scale Inelastic Dark Matter with Dark Photon Mediator via Direct Detection and Cosmological/Laboratory Constraints
• Terrestrial Probes of Electromagnetically Interacting Dark Radiation
• Decaying fermionic warm dark matter and XENON1T electronic recoil excess
• Resolving XENON Excess With Decaying Cold Dark Matter
• Boosted dark matter from a phantom fluid
• Explorations of pseudo-Dirac dark matter having keV splittings and interacting via transition electric and magnetic dipole moments
• Explaining The XENON1T Excess With Light Goldstini Dark Matter
• Connecting Low scale Seesaw for Neutrino Mass to Inelastic sub-GeV Dark Matter with Abelian Gauge Symmetry
• Models for Self-resonant Dark Matter
• Asymmetric matter from $B-L$ symmetry breaking
• Dark Fluxes from Accreting Black Holes and Direct Detections
• Undulating Dark Matter
• Dequantization of electric charge: Probing scenarios of cosmological multi-component dark matter
• Interpretation of XENON1T excess with MeV boosted dark matter
• Lepton Number Violating Electron Recoils in a $U(1{)}_{B-L}$ Model with Non-Standard Interactions
• Milky Way Satellite Census. IV. Constraints on Decaying Dark Matter from Observations of Milky Way Satellite Galaxies