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

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 R...

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Veröffentlicht in:	Physical review letters 2017-01, Vol.118 (2), p.021303-021303, Article 021303
Hauptverfasser:	Akerib, D S, Alsum, S, Araújo, H M, Bai, X, Bailey, A J, Balajthy, J, Beltrame, P, Bernard, E P, Bernstein, A, Biesiadzinski, T P, Boulton, E M, Bramante, R, Brás, P, Byram, D, Cahn, S B, Carmona-Benitez, M C, Chan, C, Chiller, A A, Chiller, C, Currie, A, Cutter, J E, Davison, T J R, Dobi, A, Dobson, J E Y, Druszkiewicz, E, Edwards, B N, Faham, C H, Fiorucci, S, Gaitskell, R J, Gehman, V M, Ghag, C, Gibson, K R, Gilchriese, M G D, Hall, C R, Hanhardt, M, Haselschwardt, S J, Hertel, S A, Hogan, D P, Horn, M, Huang, D Q, Ignarra, C M, Ihm, M, Jacobsen, R G, Ji, W, Kamdin, K, Kazkaz, K, Khaitan, D, Knoche, R, Larsen, N A, Lee, C, Lenardo, B G, Lesko, K T, Lindote, A, Lopes, M I, Manalaysay, A, Mannino, R L, Marzioni, M F, McKinsey, D N, Mei, D-M, Mock, J, Moongweluwan, M, Morad, J A, Murphy, A St J, Nehrkorn, C, Nelson, H N, Neves, F, O'Sullivan, K, Oliver-Mallory, K C, Palladino, K J, Pease, E K, Phelps, P, Reichhart, L, Rhyne, C, Shaw, S, Shutt, T A, Silva, C, Solmaz, M, Solovov, V N, Sorensen, P, Stephenson, S, Sumner, T J, Szydagis, M, Taylor, D J, Taylor, W C, Tennyson, B P, Terman, P A, Tiedt, D R, To, W H, Tripathi, M, Tvrznikova, L, Uvarov, S, Verbus, J R, Webb, R C, White, J T, Whitis, T J, Witherell, M S, Wolfs, F L H, Xu, J, Yazdani, K, Young, S K
Format:	Artikel
Sprache:	eng
Schlagworte:	ASTRONOMY AND ASTROPHYSICS Astronomy and AstroPhysics, Physics - Physics of elementary particles and fields Confidence intervals Cross sections Dark matter Exposure PHYSICS OF ELEMENTARY PARTICLES AND FIELDS Radiation counters Searching Weakly interacting massive particles Xenon
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Zusammenfassung:	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}.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.118.021303