First results from the DEAP-3600 dark matter search with argon at SNOLAB

Amaudruz, P A, Baldwin, M, Batygov, M, Beltran, B, Bina, C E, Bishop, D, Bonatt, J, Boorman, G, Boulay, M G, Broerman, B, Bromwich, T, Peeters, S, DEAP-3600 Collaboration, and Others, (2018) First results from the DEAP-3600 dark matter search with argon at SNOLAB. Physical Review Letters, 121 (7). 071801 - 1. ISSN 0031-9007

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Abstract

This paper 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 (fidicial exposure of 9.87 tonne days) of data taken during the initial filling phase demonstrates the best electronic recoil rejection using pulse-shape discrimination in argon, with leakage <1.2X107 (90% C.L.) between 15 and 31 keVee. No candidate signal events
are observed, which results in the leading limit on WIMP-nucleon spin-independent cross section on argon, <1.21044 cm2 for a 100 GeV/c2 WIMP mass (90% C.L.).

Item Type: Article
Schools and Departments: School of Mathematical and Physical Sciences > Physics and Astronomy
Research Centres and Groups: Experimental Particle Physics Research Group
Subjects: Q Science > QC Physics
Depositing User: Jodie Bacon
Date Deposited: 13 Aug 2018 10:09
Last Modified: 05 Dec 2018 14:47
URI: http://sro.sussex.ac.uk/id/eprint/77756

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Project NameSussex Project NumberFunderFunder Ref
Consolidated GrantG0927STFC-SCIENCE AND TECHNOLOGY FACILITIES COUNCILST/K001329/1