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Explaining the XENON1T Excess with Luminous Dark Matter.

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  • 1ARC Centre of Excellence for Dark Matter Particle Physics, School of Physics, The University of Melbourne, Victoria 3010, Australia.

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Summary
This summary is machine-generated.

A novel luminous dark matter model explains the XENON1T electron recoil excess. This dark matter candidate produces a detectable signal through inelastic scattering and subsequent decay within the detector.

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Area of Science:

  • Particle Physics
  • Cosmology
  • Astrophysics

Background:

  • The XENON1T experiment observed an excess of electron recoil events.
  • This excess could not be explained by known Standard Model physics or backgrounds.
  • This anomaly suggests the presence of new physics, potentially related to dark matter.

Purpose of the Study:

  • To propose and analyze a dark matter model that explains the XENON1T excess.
  • To investigate the properties of a hypothetical low-mass luminous dark matter candidate.
  • To explore future experimental strategies for verifying this dark matter scenario.

Main Methods:

  • Theoretical modeling of dark matter interactions and decays.
  • Comparison of model predictions with the XENON1T experimental data.
  • Analysis of potential distinguishing features for future direct detection experiments.

Main Results:

  • A low-mass luminous dark matter candidate with inelastic scattering properties can explain the observed excess.
  • The model predicts a specific signature in the electron recoil spectrum.
  • The mass splitting between dark matter states is constrained to be approximately 2-3 keV.

Conclusions:

  • The proposed dark matter model offers a compelling explanation for the XENON1T anomaly.
  • Future direct detection experiments can test this model by searching for specific signals.
  • Distinguishing this model from other new physics scenarios and tritium backgrounds is feasible with advanced techniques.