PhysRevD.100.022004-pubd.pdf (3.08 MB)
Search for dark matter with a 231-day exposure of liquid argon using DEAP-3600 at SNOLAB
journal contribution
posted on 2023-06-07, 06:40 authored by R Ajaj, P-A Amaudruz, G R Araujo, M Baldwin, M Batygov, B Beltran, C E Bina, J Bonatt, M G Boulay, B Broerman, J F Bueno, P M Burghardt, A Butcher, B Cai, S Cavuoti, Simon PeetersSimon Peeters, DEAP Collaboration, othersDEAP-3600 is a single-phase liquid argon (LAr) direct-detection dark matter experiment, operating 2 km underground at SNOLAB (Sudbury, Canada). The detector consists of 3279 kg of LAr contained in a spherical acrylic vessel. This paper reports on the analysis of a 758??tonne·day exposure taken over a period of 231 live-days during the first year of operation. No candidate signal events are observed in the WIMP-search region of interest, which results in the leading limit on the WIMP-nucleon spin-independent cross section on a LAr target of 3.9×10-45??cm2 (1.5×10-44??cm2) for a 100??GeV/c2 (1??TeV/c2) WIMP mass at 90% C.L. In addition to a detailed background model, this analysis demonstrates the best pulse-shape discrimination in LAr at threshold, employs a Bayesian photoelectron-counting technique to improve the energy resolution and discrimination efficiency, and utilizes two position reconstruction algorithms based on the charge and photon detection time distributions observed in each photomultiplier tube.
Funding
STFC; ST/K002570/1
History
Publication status
- Published
File Version
- Published version
Journal
Physical Review DISSN
2470-0010Publisher
American Physical SocietyExternal DOI
Issue
2Volume
100Page range
022004 1-26Department affiliated with
- Physics and Astronomy Publications
Research groups affiliated with
- Experimental Particle Physics Research Group Publications
Full text available
- Yes
Peer reviewed?
- Yes
Legacy Posted Date
2019-08-01First Open Access (FOA) Date
2019-08-01First Compliant Deposit (FCD) Date
2019-07-30Usage metrics
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