Abstract
We present the first limits on inelastic electron-scattering dark matter and dark photon absorption using a prototype SuperCDMS detector having a charge resolution of 0.1 electron-hole pairs (CDMS HVeV, a 0.93 g CDMS high-voltage device). These electron-recoil limits significantly improve experimental constraints on dark matter particles with masses as low as 1 MeV/c2. We demonstrate a sensitivity to dark photons competitive with other leading approaches but using substantially less exposure (0.49 g d). These results demonstrate the scientific potential of phonon-mediated semiconductor detectors that are sensitive to single electronic excitations.
| Original language | English (US) |
|---|---|
| Article number | 051301 |
| Journal | Physical review letters |
| Volume | 121 |
| Issue number | 5 |
| DOIs | |
| State | Published - Aug 3 2018 |
Bibliographical note
Publisher Copyright:© 2018 authors. Published by the American Physical Society.