PoS - Proceedings of Science
Volume 390 - 40th International Conference on High Energy physics (ICHEP2020) - Parallel: Dark Matter Detection
Dark matter search results from DEAP-3600 at SNOLAB
S. Viel
Full text: Not available
Abstract
The latest physics results from DEAP-3600 are summarized. DEAP-3600 is searching for dark matter interactions with a liquid argon target, shielded from cosmic rays by over 2 km of rock at SNOLAB in Sudbury, Canada. The spherical detector consists of 3.3 tonnes of liquid argon in a large ultralow-background acrylic vessel instrumented with 255 photomultiplier tubes. DEAP-3600 is sensitive to nuclear recoils from dark matter particles, which would cause the emission of prompt scintillation light. Backgrounds come from alpha particles on the inner detector surfaces, from external neutrons, from $^{39}$Ar beta decays, and from trace radioactivity in detector components. DEAP-3600 demonstrates excellent performance for pulse-shape discrimination, event reconstruction, background rejection and sensitivity to dark matter.
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