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Phys Rev Lett. 2017 Jan 13;118(2):021303. doi: 10.1103/PhysRevLett.118.021303. Epub 2017 Jan 11.

Results from a Search for Dark Matter in the Complete LUX Exposure.

Author information

1
Case Western Reserve University, Department of Physics, 10900 Euclid Ave, Cleveland, Ohio 44106, USA.
2
SLAC National Accelerator Laboratory, 2575 Sand Hill Road, Menlo Park, California 94205, USA.
3
Kavli Institute for Particle Astrophysics and Cosmology, Stanford University, 452 Lomita Mall, Stanford, California 94309, USA.
4
University of Wisconsin-Madison, Department of Physics, 1150 University Avenue, Madison, Wisconsin 53706, USA.
5
Imperial College London, High Energy Physics, Blackett Laboratory, London SW7 2BZ, United Kingdom.
6
South Dakota School of Mines and Technology, 501 East St. Joseph Street, Rapid City, South Dakota 57701, USA.
7
University of Maryland, Department of Physics, College Park, Maryland 20742, USA.
8
SUPA, School of Physics and Astronomy, University of Edinburgh, Edinburgh EH9 3FD, United Kingdom.
9
University of California Berkeley, Department of Physics, Berkeley, California 94720, USA.
10
Yale University, Department of Physics, 217 Prospect Street, New Haven, Connecticut 06511, USA.
11
Lawrence Livermore National Laboratory, 7000 East Avenue, Livermore, California 94551, USA.
12
LIP-Coimbra, Department of Physics, University of Coimbra, Rua Larga, 3004-516 Coimbra, Portugal.
13
University of South Dakota, Department of Physics, 414E Clark Street, Vermillion, South Dakota 57069, USA.
14
South Dakota Science and Technology Authority, Sanford Underground Research Facility, Lead, South Dakota 57754, USA.
15
University of California Santa Barbara, Department of Physics, Santa Barbara, California 93106, USA.
16
Brown University, Department of Physics, 182 Hope Street, Providence, Rhode Island 02912, USA.
17
University of California Davis, Department of Physics, One Shields Avenue, Davis, California 95616, USA.
18
Lawrence Berkeley National Laboratory, 1 Cyclotron Road, Berkeley, California 94720, USA.
19
Department of Physics and Astronomy, University College London, Gower Street, London WC1E 6BT, United Kingdom.
20
University of Rochester, Department of Physics and Astronomy, Rochester, New York 14627, USA.
21
Texas A and M University, Department of Physics, College Station, Texas 77843, USA.
22
University at Albany, State University of New York, Department of Physics, 1400 Washington Avenue, Albany, New York 12222, USA.

Abstract

We report constraints on spin-independent weakly interacting massive particle (WIMP)-nucleon scattering using a 3.35×10^{4}  kg day exposure of the Large Underground Xenon (LUX) experiment. A dual-phase xenon time projection chamber with 250 kg of active mass is operated at the Sanford Underground Research Facility under Lead, South Dakota (USA). With roughly fourfold improvement in sensitivity for high WIMP masses relative to our previous results, this search yields no evidence of WIMP nuclear recoils. At a WIMP mass of 50  GeV c^{-2}, WIMP-nucleon spin-independent cross sections above 2.2×10^{-46}  cm^{2} are excluded at the 90% confidence level. When combined with the previously reported LUX exposure, this exclusion strengthens to 1.1×10^{-46}  cm^{2} at 50  GeV c^{-2}.

PMID:
28128598
DOI:
10.1103/PhysRevLett.118.021303
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