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arxiv: 1705.03380 · v2 · pith:HJWYQZXGnew · submitted 2017-05-09 · 🌌 astro-ph.CO

Limits on spin-dependent WIMP-nucleon cross section obtained from the complete LUX exposure

LUX Collaboration: D. S. Akerib , S. Alsum , H. M. Ara\'ujo , X. Bai , A. J. Bailey , J. Balajthy , P. Beltrame , E. P. Bernard
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A. Bernstein T. P. Biesiadzinski E. M. Boulton P. Br\'as D. Byram S. B. Cahn M. C. Carmona-Benitez C. Chan A. A. Chiller C. Chiller A. Currie J. E. Cutter T. J. R. Davison A. Dobi J. E. Y. Dobson E. Druszkiewicz B. N. Edwards C. H. Faham S. R. Fallon S. Fiorucci R. J. Gaitskell V. M. Gehman C. Ghag M. G. D. Gilchriese C. R. Hall M. Hanhardt S. J. Haselschwardt S. A. Hertel D. P. Hogan M. Horn D. Q. Huang C. M. Ignarra R. G. Jacobsen W. Ji K. Kamdin K. Kazkaz D. Khaitan R. Knoche N. A. Larsen C. Lee B. G. Lenardo K. T. Lesko A. Lindote M. I. Lopes A. Manalaysay R. L. Mannino M. F. Marzioni D. N. McKinsey D. M. Mei J. Mock M. Moongweluwan J. A. Morad A. St. J. Murphy C. Nehrkorn H. N. Nelson F. Neves K. O'Sullivan K. C. Oliver-Mallory K. J. Palladino E. K. Pease L. Reichhart C. Rhyne S. Shaw T. A. Shutt C. Silva M. Solmaz V. N. Solovov P. Sorensen S. Stephenson T. J. Sumner M. Szydagis D. J. Taylor W. C. Taylor B. P. Tennyson P. A. Terman D. R. Tiedt W. H. To M. Tripathi L. Tvrznikova S. Uvarov V. Velan J. R. Verbus R. C. Webb J. T. White T. J. Whitis M. S. Witherell F. L. H. Wolfs J. Xu K. Yazdani S. K. Young C. Zhang
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keywords spin-dependentcrossexposurelimitssectionsigmatimesunderground
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We present experimental constraints on the spin-dependent WIMP-nucleon elastic cross sections from the total 129.5 kg-year exposure acquired by the Large Underground Xenon experiment (LUX), operating at the Sanford Underground Research Facility in Lead, South Dakota (USA). A profile likelihood ratio analysis allows 90% CL upper limits to be set on the WIMP-neutron (WIMP-proton) cross section of $\sigma_n$ = 1.6$\times 10^{-41}$ cm$^{2}$ ($\sigma_p$ = 5$\times 10^{-40}$ cm$^{2}$) at 35 GeV$c^{-2}$, almost a sixfold improvement over the previous LUX spin-dependent results. The spin-dependent WIMP-neutron limit is the most sensitive constraint to date.

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