Light Dark Matter Search with a High-Resolution Athermal Phonon Detector Operated Above Ground

We present limits on spin-independent dark matter-nucleon interactions using a 10.6 \mathrm{g} Si athermal phonon detector with a baseline energy resolution of \sigma_E=3.86 \pm 0.04 (\mathrm{stat.})^{+0.19}_{-0.00} (\mathrm{syst.}) \mathrm{eV}. This exclusion analysis sets the most stringent dark matter-nucleon scattering cross-section limits achieved by a cryogenic detector for dark matter particle masses... Show more