2018/07/19 by R. Foot, Foot, R.
Physics and Astronomy · #Astrophysics of Galaxies (astro-ph.GA) #Atomic and Subatomic Physics Research #Dark Matter and Cosmic Phenomena #FOS: Physical sciences #High Energy Physics - Phenomenology (hep-ph) #Particle physics theoretical and experimental studies #astro-ph.GA #hep-ph
paper · pdf · doi:10.48550/arxiv.1807.07221
5 pages
arxiv created 2018/07/19 · openalex publication_date 2018/07/19 · arxiv updated 2018/07/20 · openalex created_date 2018/08/03 · openalex updated_date 2026/07/28
Within the context of mirror dark matter, the dominant mass component of the Milky Way dark halo consists of mirror helium ions. Mirror helium can interact with ordinary matter if the kinetic mixing interaction exists. Mirror helium being rather light, m ≃ 3.73 GeV, generally produces sub-keV recoils in direct detection experiments. Recently, the CRESST-III experiment has began probing the sub-keV recoil energy region and is currently the most sensitive probe of such particles. We point out here that the small excess seen in the low energy recoil data obtained in the CRESST-III experiment is consistent with mirror helium scattering if the kinetic mixing parameter is around ε≈ 5 × 10-10. This kinetic mixing strength lies within the estimated range favoured by small scale structure considerations.