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A Detailed Look at the First Results from the Large Underground Xenon (LUX) Dark Matter Experiment

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arxiv 1402.3731 v2 pith:O6X2GS5X submitted 2014-02-15 hep-ex astro-ph.COastro-ph.IMphysics.ins-det

A Detailed Look at the First Results from the Large Underground Xenon (LUX) Dark Matter Experiment

classification hep-ex astro-ph.COastro-ph.IMphysics.ins-det
keywords experimentcross-sectiondarkfirstlimitmatterresultsunderground
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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LUX, the world's largest dual-phase xenon time-projection chamber, with a fiducial target mass of 118 kg and 10,091 kg-days of exposure thus far, is currently the most sensitive direct dark matter search experiment. The initial null-result limit on the spin-independent WIMP-nucleon scattering cross-section was released in October 2013, with a primary scintillation threshold of 2 phe, roughly 3 keVnr for LUX. The detector has been deployed at the Sanford Underground Research Facility (SURF) in Lead, South Dakota, and is the first experiment to achieve a limit on the WIMP cross-section lower than $10^{-45}$ cm$^{2}$. Here we present a more in-depth discussion of the novel energy scale employed to better understand the nuclear recoil light and charge yields, and of the calibration sources, including the new internal tritium source. We found the LUX data to be in conflict with low-mass WIMP signal interpretations of other results.

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