2018/06/12 by R. Foot, Foot, R. · 2 citations
Physics and Astronomy · #Astrophysics of Galaxies (astro-ph.GA) #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Quantum Mechanics and Applications #astro-ph.GA #hep-ph
paper · pdf · doi:10.48550/arxiv.1806.04293
10 pages
openalex publication_date 2018/06/12 · openalex created_date 2018/06/21 · arxiv created 2018/12/18 · arxiv updated 2018/12/19 · openalex updated_date 2026/07/28
Previous work has argued that, in the framework of plasma dark matter models, the DAMA annual modulation signal can be consistently explained with electron recoils. In the specific case of mirror dark matter, that explanation requires an effective low velocity cutoff, vc \gtrsim 30,000 km/s, for the halo mirror electron distribution at the detector. We show here that this cutoff can result from collisional shielding of the detector from the halo wind due to Earth-bound dark matter. We also show that shielding effects can reconcile the kinetic mixing parameter value inferred from direct detection experiments with the value favoured from small scale structure considerations, ε≈ 2 × 10-10.