Resolving XENON Excess With Decaying Cold Dark Matter

Abstract

We propose a decaying cold dark matter model to explain the excess of electron recoil observed at the XENON1T experiment. In this scenario, the daughter dark matter from the parent dark matter decay easily obtains velocity large enough to saturate the peak of the electron recoil energy around 2.5 keV, and the observed signal rate can be fulfilled by the parent dark matter with a mass of order 10-200 MeV and a lifetime larger than the age of Universe. We verify that this model is consistent with experimental limits from dark matter detections, Cosmic Microwave Background and Large Scale Structure experiments.

arXiv commentv3: to match the published version

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Cited by in corpus (6)

• A Next-Generation Liquid Xenon Observatory for Dark Matter and Neutrino Physics
• Direct detection of dark energy: the XENON1T excess and future prospects
• Linear cosmological constraints on 2-body decaying dark matter scenarios and the $S_8$ tension
• Explorations of pseudo-Dirac dark matter having keV splittings and interacting via transition electric and magnetic dipole moments
• Constraining decaying dark matter with BOSS data and the effective field theory of large-scale structures
• Freeze-in Dark Matter via Lepton Portal: Hubble Tension and Stellar Cooling