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Physical Review Letters· 2014Q1

First Results from the LUX Dark Matter Experiment at the Sanford Underground Research Facility

D. S. Akerib, H. M. Araújo, X. Bai, A. J. Bailey et al.

Short summary

The LUX dark matter experiment reports new limits on WIMP-nucleon scattering, finding no evidence for a signal and setting a cross-section upper limit of 7.6 × 10(-46) cm(2) at 33 GeV/c(2).

AI-generated from the title and abstract; the full text is not read.

Key points

  • LUX experiment analyzed 85.3 live days of data from April-August 2013.
  • A fiducial volume of 118 kg of xenon was used.
  • Data is consistent with background-only hypothesis, setting a 90% CL upper limit.
  • Minimum upper limit on spin-independent WIMP-nucleon cross-section is 7.6 × 10(-46) cm(2) at 33 GeV/c(2).
  • Results disagree with low-mass WIMP signal interpretations from other experiments.

AI-generated from the title and abstract; the full text is not read.

Abstract

The Large Underground Xenon (LUX) experiment is a dual-phase xenon time-projection chamber operating at the Sanford Underground Research Facility (Lead, South Dakota). The LUX cryostat was filled for the first time in the underground laboratory in February 2013. We report results of the first WIMP search data set, taken during the period from April to August 2013, presenting the analysis of 85.3 live days of data with a fiducial volume of 118 kg. A profile-likelihood analysis technique shows our data to be consistent with the background-only hypothesis, allowing 90% confidence limits to be set on spin-independent WIMP-nucleon elastic scattering with a minimum upper limit on the cross section of 7.6 × 10(-46) cm(2) at a WIMP mass of 33 GeV/c(2). We find that the LUX data are in disagreement with low-mass WIMP signal interpretations of the results from several recent direct detection experiments.

The authors' abstract, as published at the source. Physical Review Letters, 2014 · DOI ↗

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