Light Dark Matter Search with a High-Resolution Athermal Phonon Detector Operated Above Ground. (arXiv:2007.14289v4 [hep-ex] UPDATED)

Light Dark Matter Search with a High-Resolution Athermal Phonon Detector Operated Above Ground. (arXiv:2007.14289v4 [hep-ex] UPDATED)
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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 from $93$ to $140$
$mathrm{MeV}/c^2$, with a raw exposure of $9.9$ $mathrm{g}cdotmathrm{d}$
acquired at an above-ground facility. This work illustrates the scientific
potential of detectors with athermal phonon sensors with eV-scale energy
resolution for future dark matter searches.

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