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LUX, the world's largest dual-phase xenon time-projection chamber, with afiducial target mass of 118 kg and 10,091 kg-days of exposure thus far, iscurrently the most sensitive direct dark matter search experiment. The initialnull-result limit on the spin-independent WIMP-nucleon scattering cross-sectionwas released in October 2013, with a primary scintillation threshold of 2 phe,roughly 3 keVnr for LUX. The detector has been deployed at the SanfordUnderground Research Facility (SURF) in Lead, South Dakota, and is the firstexperiment 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 scaleemployed to better understand the nuclear recoil light and charge yields, andof the calibration sources, including the new internal tritium source. We foundthe LUX data to be in conflict with low-mass WIMP signal interpretations ofother results.

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