Radiogenic and Muon-Induced Backgrounds in the LUX Dark Matter Detector

D. S. Akerib; H. M. Araujo; X. Bai; A. J. Bailey; J. Balajthy; E. Bernard; A. Bernstein; A. Bradley; D. Byram; S. B. Cahn; M. C. Carmona-Benitez; C. Chan; J. J. Chapman; A. A. Chiller; C. Chiller; T. Coffey; A. Currie; L. de Viveiros; A. Dobi; J. Dobson; E. Druszkiewicz; B. Edwards; C. H. Faham; S. Fiorucci; C. Flores; R. J. Gaitskell; V. M. Gehman; C. Ghag; K. R. Gibson; M. G. D. Gilchriese; C. Hall; S. A. Hertel; M. Horn; D. Q. Huang; M. Ihm; R. G. Jacobsen; K. Kazkaz; R. Knoche; N. A. Larsen; C. Lee; A. Lindote; M. I. Lopes; D. C. Malling; R. Mannino; D. N. McKinsey; D. -M. Mei; J. Mock; M. Moongweluwan; J. Morad; A. St. J. Murphy

doi:10.1016/j.astropartphys.2014.07.009

Radiogenic and Muon-Induced Backgrounds in the LUX Dark Matter Detector

Instrumentation and Methods for Astrophysics 2014-08-25 v1 Instrumentation and Detectors

Authors: D. S. Akerib , H. M. Araujo , X. Bai , A. J. Bailey , J. Balajthy , E. Bernard , A. Bernstein , A. Bradley , D. Byram , S. B. Cahn , M. C. Carmona-Benitez , C. Chan , J. J. Chapman , A. A. Chiller , C. Chiller , T. Coffey , A. Currie , L. de Viveiros , A. Dobi , J. Dobson , E. Druszkiewicz , B. Edwards , C. H. Faham , S. Fiorucci , C. Flores , R. J. Gaitskell , V. M. Gehman , C. Ghag , K. R. Gibson , M. G. D. Gilchriese , C. Hall , S. A. Hertel , M. Horn , D. Q. Huang , M. Ihm , R. G. Jacobsen , K. Kazkaz , R. Knoche , N. A. Larsen , C. Lee , A. Lindote , M. I. Lopes , D. C. Malling , R. Mannino , D. N. McKinsey , D. -M. Mei , J. Mock , M. Moongweluwan , J. Morad , A. St. J. Murphy , C. Nehrkorn , H. Nelson , F. Neves , R. A. Ott , M. Pangilinan , P. D. Parker , E. K. Pease , K. Pech , P. Phelps , L. Reichhart , T. Shutt , C. Silva , V. N. Solovov , P. Sorensen , K. O'Sullivan , T. J. Sumner , M. Szydagis , D. Taylor , B. Tennyson , D. R. Tiedt , M. Tripathi , S. Uvarov , J. R. Verbus , N. Walsh , R. Webb , J. T. White , M. S. Witherell , F. L. H. Wolfs , M. Woods , C. Zhang

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Abstract

The Large Underground Xenon (LUX) dark matter experiment aims to detect rare low-energy interactions from Weakly Interacting Massive Particles (WIMPs). The radiogenic backgrounds in the LUX detector have been measured and compared with Monte Carlo simulation. Measurements of LUX high-energy data have provided direct constraints on all background sources contributing to the background model. The expected background rate from the background model for the 85.3 day WIMP search run is $(2.6\pm0.2_{\textrm{stat}}\pm0.4_{\textrm{sys}})\times10^{-3}$ ~events~keV $_{ee}^{-1}$ ~kg $^{-1}$ ~day $^{-1}$ in a 118~kg fiducial volume. The observed background rate is $(3.6\pm0.4_{\textrm{stat}})\times10^{-3}$ ~events~keV $_{ee}^{-1}$ ~kg $^{-1}$ ~day $^{-1}$ , consistent with model projections. The expectation for the radiogenic background in a subsequent one-year run is presented.

Keywords

LUX dark matter radiogenic background muon-induced background WIMP Monte Carlo simulation background model

Cite

@article{arxiv.1403.1299,
  title  = {Radiogenic and Muon-Induced Backgrounds in the LUX Dark Matter Detector},
  author = {D. S. Akerib and H. M. Araujo and X. Bai and A. J. Bailey and J. Balajthy and E. Bernard and A. Bernstein and A. Bradley and D. Byram and S. B. Cahn and M. C. Carmona-Benitez and C. Chan and J. J. Chapman and A. A. Chiller and C. Chiller and T. Coffey and A. Currie and L. de Viveiros and A. Dobi and J. Dobson and E. Druszkiewicz and B. Edwards and C. H. Faham and S. Fiorucci and C. Flores and R. J. Gaitskell and V. M. Gehman and C. Ghag and K. R. Gibson and M. G. D. Gilchriese and C. Hall and S. A. Hertel and M. Horn and D. Q. Huang and M. Ihm and R. G. Jacobsen and K. Kazkaz and R. Knoche and N. A. Larsen and C. Lee and A. Lindote and M. I. Lopes and D. C. Malling and R. Mannino and D. N. McKinsey and D. -M. Mei and J. Mock and M. Moongweluwan and J. Morad and A. St. J. Murphy and C. Nehrkorn and H. Nelson and F. Neves and R. A. Ott and M. Pangilinan and P. D. Parker and E. K. Pease and K. Pech and P. Phelps and L. Reichhart and T. Shutt and C. Silva and V. N. Solovov and P. Sorensen and K. O'Sullivan and T. J. Sumner and M. Szydagis and D. Taylor and B. Tennyson and D. R. Tiedt and M. Tripathi and S. Uvarov and J. R. Verbus and N. Walsh and R. Webb and J. T. White and M. S. Witherell and F. L. H. Wolfs and M. Woods and C. Zhang},
  journal= {arXiv preprint arXiv:1403.1299},
  year   = {2014}
}

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18 pages, 12 figures / 17 images, submitted to Astropart. Phys

Radiogenic and Muon-Induced Backgrounds in the LUX Dark Matter Detector

Abstract

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