DAMA annual modulation is not due to electron recoils from plasma/mirror dark matter with kinetic mixing. Issue 10 (20th October 2021)

• Record Type: Journal Article
• Authors: Adams, Douglas Q.; Jacobsen, Sunniva; Kelso, Chris
• Is Part Of: Journal of cosmology and astroparticle physics. Volume 2021:Issue 10(2021)
• Publication Date: 2021-10-20
• Subjects: dark matter detectors -- dark matter experiments; Cosmology -- Periodicals; Astrophysics -- Periodicals; 523.0105
• DOI: 10.1088/1475-7516/2021/10/060
• Languages: English
• ISSNs: 1475-7516

Abstract

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.