Mirror dark matter, a hidden-sector counterpart to the Standard Model with identical particle content, could be detectable through photon-mirror-photon kinetic mixing (ϵ). We present new constraints from CDEX-10 low-energy recoil data, establishing ϵ<2×10−10 for mirror nuclear dark matter in the 10--56 GeV mass range. Projections for CDEX-300 (with 95 days of exposure) show significantly improved sensitivity, reaching ϵ<3.75×10−11 for a local mirror halo temperature below 0.3 keV, surpassing existing constraints from LUX and positronium decays. These results demonstrate CDEX-300's unique capability to probe kinetic-mixing parameter space, providing stringent constraints on mirror dark matter models.
@article{arxiv.2409.01486,
title = {Shedding Light on Mirror Dark Matter Using CDEX},
author = {M. Tousif Raza},
journal= {arXiv preprint arXiv:2409.01486},
year = {2025}
}