期刊
PHYSICS LETTERS B
卷 711, 期 2, 页码 153-161出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.physletb.2012.03.078
关键词
Dark matter; WIMPs; Superheated droplets; SNOLAB
资金
- National Sciences and Engineering Research Council of Canada (NSERC)
- Canada Foundation for Innovation (CFI)
- National Science Foundation (NSF) [0856273]
- Department of Atomic Energy (DAE), Govt. of India at SINP, Kolkata
- Czech Ministry of Education, Youth and Sports [MSM6840770029]
- Division Of Physics
- Direct For Mathematical & Physical Scien [1205987, 0856273] Funding Source: National Science Foundation
Recent results from the PICASSO dark matter search experiment at SNOLAB are reported. These results were obtained using a subset of 10 detectors with a total target mass of 0.72 kg of 19F and an exposure of 114 kgd. The low backgrounds in PICASSO allow recoil energy thresholds as low as 1.7 keV to be obtained which results in an increased sensitivity to interactions from Weakly Interacting Massive Particles (WIMPs) with masses below 10 GeV/c(2). No dark matter signal was found. Best exclusion limits in the spin dependent sector were obtained for WIMP masses of 20 GeV/c(2) with a cross section on protons of sigma(SD)(p) = 0.032 pb (90% CL.). In the spin independent sector close to the low mass region of 7 GeV/c(2) favoured by CoGeNT and DAMA/LIBRA, cross sections larger than sigma(SI)(p) = 1.41 x 10(-4) pb (90% C.L.) are excluded. 2012 Elsevier B.V. All rights reserved.
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