Results on the Spin-Dependent Scattering of Weakly Interacting Massive Particles on Nucleons from the Run 3 Data of the LUX Experiment.
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We present experimental constraints on the spin-dependent WIMP (weakly interacting massive particle)-nucleon elastic cross sections from LUX data acquired in 2013. LUX is a dual-phase xenon time projection chamber operating at the Sanford Underground Research Facility (Lead, South Dakota), which is designed to observe the recoil signature of galactic WIMPs scattering from xenon nuclei. A profile likelihood ratio analysis of 1.410^{4}kgday of fiducial exposure allows 90%C.L. upper limits to be set on the WIMP-neutron (WIMP-proton) cross section of _{n}=9.410^{-41}cm^{2} (_{p}=2.910^{-39}cm^{2}) at 33GeV/c^{2}. The spin-dependent WIMP-neutron limit is the most sensitive constraint to date.