Sensitivity projections for a dual-phase argon TPC optimized for light dark matter searches through the ionization channel

Time projection chamber
DOI: 10.1103/physrevd.107.112006 Publication Date: 2023-06-20T14:09:26Z
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ABSTRACT
Dark matter lighter than 10 GeV/c$^2$ encompasses a promising range of candidates. A conceptual design for new detector, DarkSide-LowMass, is presented, based on the DarkSide-50 detector and progress toward DarkSide-20k, optimized low-threshold electron-counting measurement. Sensitivity to light dark explored various potential energy thresholds background rates. These studies show that DarkSide-LowMass can achieve sensitivity down solar neutrino floor GeV-scale masses significant MeV/c$^2$ considering Migdal effect or interactions with electrons. Requirements optimizing detector's are explored, as gains from modeling mitigating spurious electron backgrounds may dominate signal at lowest energies.
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