Regular Article - Experimental Physics
Resolving XENON excess with decaying cold dark matter
Department of Physics, Chongqing University, 401331, Chongqing, China
Accepted: 18 May 2021
Published online: 24 May 2021
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.
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