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Creators/Authors contains: "Kavner, A_R L"

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  1. ; ; ; ; ; ; ; ; ; ; et al (, Physical Review Letters)
    We present results of a search for spin-independent dark matter-nucleus interactions in a 1     cm 2 by 1 mm thick (0.233 g) high-resolution silicon athermal phonon detector operated above ground. For interactions in the substrate, this detector achieves an rms baseline energy resolution of 361.5 ( 4 )     m eV (statistical error), the best for any athermal phonon detector to date. With an exposure of 0.233     g × 12 hours, we place the most stringent constraints on dark matter masses between 44 and 87     M eV / c 2 , with the lowest unexplored cross section of 4 × 10 − 32     c m 2 at 87     M eV / c 2 . We employ a conservative salting technique to reach the lowest dark matter mass ever probed via direct detection experiment. This constraint is enabled by two-channel rejection of low energy backgrounds that are coupled to individual sensors. 
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    Free, publicly-accessible full text available October 1, 2026