Journal
PHYSICAL REVIEW LETTERS
Volume 121, Issue 7, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.121.071801
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Funding
- Natural Sciences and Engineering Research Council of Canada
- Canadian Foundation for Innovation (CFI)
- Ontario Ministry of Research and Innovation (MRI)
- Alberta Advanced Education and Technology (ASRIP)
- Queen's University
- University of Alberta
- Carleton University
- DGAPA-UNAM (PAPIIT) [IA100316, IA100118]
- Consejo Nacional de Ciencia y Tecnologia (CONACyT, Mexico) [252167]
- European Research Council [ERC StG 279980]
- UK Science & Technology Facilities Council (STFC) [ST/K002570/1]
- Leverhulme Trust [ECF-20130496]
- Rutherford Appleton Laboratory Particle Physics Division
- STFC
- SEPNet
- CFI
- Province of Ontario MRI
- STFC [ST/R002908/1, ST/K002473/1, ST/N000307/1, ST/K001329/1, ST/K002570/1] Funding Source: UKRI
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This Letter reports the first results of a direct dark matter search with the DEAP-3600 single-phase liquid argon (LAr) detector. The experiment was performed 2 km underground at SNOLAB (Sudbury, Canada) utilizing a large target mass, with the LAr target contained in a spherical acrylic vessel of 3600 kg capacity. The LAr is viewed by an array of PMTs, which would register scintillation light produced by rare nuclear recoil signals induced by dark matter particle scattering. An analysis of 4.44 live days (fiducial exposure of 9.87 ton day) of data taken during the initial filling phase demonstrates the best electronic recoil rejection using pulse-shape discrimination in argon, with leakage < 1.2 x 10(-7) (90% C.L.) between 15 and 31 keV(ee). No candidate signal events are observed, which results in the leading limit on weakly interacting massive particle (WIMP)-nucleon spin-independent cross section on argon, <1.2 x 10(-44) cm(2) for a 100 GeV/c(2) WIMP mass (90% C. L.).
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