First Results from the DEAP-3600 Dark Matter Search with Argon at SNOLAB

First Results from the DEAP-3600 Dark Matter Search with Argon at SNOLAB

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 36...

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Veröffentlicht in:Physical review letters 2018-08, Vol.121 (7), p.071801-071801, Article 071801
Hauptverfasser: 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, Bueno, J F, Burghardt, P M, Butcher, A, Cai, B, Chan, S, Chen, M, Chouinard, R, Cleveland, B T, Cranshaw, D, Dering, K, DiGioseffo, J, Dittmeier, S, Duncan, F A, Dunford, M, Erlandson, A, Fatemighomi, N, Florian, S, Flower, A, Ford, R J, Gagnon, R, Giampa, P, Golovko, V V, Gorel, P, Gornea, R, Grace, E, Graham, K, Gulyev, E, Hakobyan, R, Hall, A, Hallin, A L, Hamstra, M, Harvey, P J, Hearns, C, Jillings, C J, Kamaev, O, Kemp, A, Kuźniak, M, Langrock, S, La Zia, F, Lehnert, B, Lidgard, J J, Lim, C, Lindner, T, Linn, Y, Liu, S, Majewski, P, Mathew, R, McDonald, A B, McElroy, T, McGinn, T, McLaughlin, J B, Mead, S, Mehdiyev, R, Mielnichuk, C, Monroe, J, Muir, A, Nadeau, P, Nantais, C, Ng, C, Noble, A J, O'Dwyer, E, Ohlmann, C, Olchanski, K, Olsen, K S, Ouellet, C, Pasuthip, P, Peeters, S J M, Pollmann, T R, Rand, E T, Rau, W, Rethmeier, C, Retière, F, Seeburn, N, Shaw, B, Singhrao, K, Skensved, P, Smith, B, Smith, N J T, Sonley, T, Soukup, J, Stainforth, R, Stone, C, Strickland, V, Sur, B, Tang, J, Taylor, J, Veloce, L, Vázquez-Jáuregui, E, Walding, J
Format: Artikel
Sprache:eng
Schlagworte:
Argon
Dark matter
Particle spin
Recoil
Weakly interacting massive particles
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Zusammenfassung: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
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.121.071801