Kavli Affiliate: D. B. Macfarlane
| First 5 Authors: SuperCDMS Collaboration, SuperCDMS Collaboration, , ,
| Summary:
We present constraints on low mass dark matter-electron scattering and
absorption interactions using a SuperCDMS high-voltage eV-resolution (HVeV)
detector. Data were taken underground in the NEXUS facility located at Fermilab
with an overburden of 225 meters of water equivalent. The experiment benefits
from the minimizing of luminescence from the printed circuit boards in the
detector holder used in all previous HVeV studies. A blind analysis of
$6.1,mathrmgcdot days$ of exposure produces exclusion limits for dark
matter-electron scattering cross-sections for masses as low as
$1,mathrmMeV/c^2$, as well as on the photon-dark photon mixing parameter
and the coupling constant between axion-like particles and electrons for
particles with masses $>1.2,mathrmeV/c^2$ probed via absorption processes.
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