Abstract
If dark matter is composed of new fundamental particles,Earth's orbital motion around the Sun may induce an annual modulation in the rate at which these particles interact in a terrestrial detector.The DAMA collaboration has identified at a 12σ confidence level such an annual modulation in their event rate.One previously proposed explanation is `plasma dark matter' (e.g. mirror dark matter)which would have electron recoils in the detector from interactions via kinetic mixing.We perform a chi-squared goodness-of-fit test of this plasma dark matter model to DAMA/LIBRA modulation amplitude which rejects the hypothesis of plasma dark matter as an explanation of this data at greater than 7σ.
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