| Article | |
| Report number | arXiv:1807.10291 |
| Title | Directional Detection of Light Dark Matter with Polar Materials |
| Author(s) | Griffin, Sinead (UC, Berkeley ; LBL, Berkeley) ; Knapen, Simon (UC, Berkeley ; LBL, Berkeley) ; Lin, Tongyan (UC, Berkeley ; LBL, Berkeley ; UC, San Diego) ; Zurek, Kathryn M. (UC, Berkeley ; LBL, Berkeley ; CERN) |
| Publication | 2018-12-28 |
| Imprint | 2018-07-26 |
| Number of pages | 27 |
| Note | 48 pages, 17 figures. Has animated content which requires Adobe Acrobat reader |
| In: | Phys. Rev. D 98 (2018) 115034 |
| DOI | 10.1103/PhysRevD.98.115034 (publication) |
| Subject category | hep-ex ; Particle Physics - Experiment ; cond-mat.mtrl-sci ; hep-ph ; Particle Physics - Phenomenology |
| Abstract | We consider the direct detection of dark matter (DM) with polar materials, where single production of optical or acoustic phonons gives excellent reach to scattering of sub-MeV DM for both scalar and vector mediators. Using Density Functional Theory (DFT), we calculate the material-specific matrix elements, focusing on GaAs and sapphire, and show that DM scattering in an anisotropic crystal such as sapphire features a strong directional dependence. For example, for a DM candidate with mass 40 keV and relic abundance set by freeze-in, the daily modulation in the interaction rate can be established at 90\% C.L. with a gram-year of exposure. Non-thermal dark photon DM in the meV - eV mass range can also be effectively absorbed in polar materials. |
| Copyright/License | preprint: (License: arXiv nonexclusive-distrib 1.0) publication: © 2018-2024 authors (License: CC-BY-4.0) |
Corresponding record in: Inspire
Record created 2018-08-14, last modified 2023-10-12