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Low-Energy Backgrounds in Solid-State Phonon and Charge Detectors
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Solid-state phonon and charge detectors probe the scattering of weakly interacting particles, such as dark matter and neutrinos, through their low recoil thresholds. Recent advancements have pushed sensitivity to eV-scale energy depositions, uncovering previously-unseen low-energy excess backgrounds. While some arise from known processes such as thermal radiation, luminescence, and stress, others remain unexplained. This review examines these backgrounds, their possible origins, and parallels to low-energy effects in solids. Their understanding is essential for interpreting particle interactions at and below the eV-scale.
Forward citations
Cited by 7 Pith papers
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Logarithmic Wavelets for Dark Matter--Phonon Scattering
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Light Dark Matter Search with 7.8 Tonne-Year of Ionization-Only Data in XENONnT
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SENSEI: A Search for Diurnal Modulation in sub-GeV Dark Matter Scattering
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Observation of a low energy nuclear recoil peak in the neutron calibration data of an Al$_{2}$O$_{3}$ crystal in CRESST-III
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COSINUS -- a model-independent challenge of the DAMA/LIBRA dark matter claim with cryogenic NaI detectors operated in a new low-background facility
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The CRESST experiment: towards the next-generation of sub-GeV direct dark matter detection
CRESST's projected 288-channel upgrade with gram-scale CaWO4 detectors could reach spin-independent dark matter cross sections near 10^-42 cm^2 at 1 GeV/c^2, if the low-energy excess is reduced by a factor of 10 to 100.
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