Sub-GeV Dark Matter Results from an Above-Ground Detector with 2.3 eV Energy Resolution

The second generation Cryogenic PhotoDetector (CPDv2) is a large area, 11-gram detector with a 2.3 eV energy resolution, which employs a TES-based readout on a Si absorber. The device's excellent resolution makes it well suited for the direct detection of light dark matter (LDM) with masses below 1 GeV. In a collaboration between SuperCDMS and SPICE/HeRALD, a short-exposure search for LDM was performed with this device on the surface. This talk will discuss the results of this search, including the employment of new techniques to account for sensitivity to below threshold events which may be boosted by noise fluctuations.