Evidence for mirror dark matter from the CDMS low energy electron recoil spectrum

Abstract

We point out that mirror dark matter predicts low energy ($E_R\stackrel{<}{\sim }2$ keV) electron recoils from mirror electron scattering as well as nuclear recoils from mirror ion scattering. The former effect is examined and applied to the recently released low energy electron recoil data from the CDMS collaboration. We speculate that the sharp rise in electron recoils seen in CDMS below 2 keV might be due to mirror electron scattering and show that the parameters suggested by the data are roughly consistent with the mirror dark matter explanation of the annual modulation signal observed in the DAMA/Libra and DAMA/NaI experiments. Thus, the CDMS data offer tentative evidence supporting the mirror dark matter explanation of the DAMA experiments, which can be more rigorously checked by future low energy electron recoil measurements.

about 9 pages, comments welcome!

References in corpus (3)

• First results from DAMA/LIBRA and the combined results with DAMA/NaI
• Mirror dark matter and the new DAMA/LIBRA results: A simple explanation for a beautiful experiment
• Analysis of the low-energy electron-recoil spectrum of the CDMS experiment

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• Positronium Portal into Hidden Sector: A new Experiment to Search for Mirror Dark Matter
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• Mirror Dark Matter and Electronic Recoil Events in XENON1T
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• Invisible decay of muonium: Tests of the standard model and searches for new physics