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Calibration, event reconstruction, data analysis, and limit calculation for the LUX dark matter experiment

  • Author(s): Akerib, DS
  • Alsum, S
  • Araújo, HM
  • Bai, X
  • Bailey, AJ
  • Balajthy, J
  • Beltrame, P
  • Bernard, EP
  • Bernstein, A
  • Biesiadzinski, TP
  • Boulton, EM
  • Brás, P
  • Byram, D
  • Cahn, SB
  • Carmona-Benitez, MC
  • Chan, C
  • Currie, A
  • Cutter, JE
  • Davison, TJR
  • Dobi, A
  • Dobson, JEY
  • Druszkiewicz, E
  • Edwards, BN
  • Faham, CH
  • Fallon, SR
  • Fan, A
  • Fiorucci, S
  • Gaitskell, RJ
  • Gehman, VM
  • Genovesi, J
  • Ghag, C
  • Gilchriese, MGD
  • Hall, CR
  • Hanhardt, M
  • Haselschwardt, SJ
  • Hertel, SA
  • Hogan, DP
  • Horn, M
  • Huang, DQ
  • Ignarra, CM
  • Jacobsen, RG
  • Ji, W
  • Kamdin, K
  • Kazkaz, K
  • Khaitan, D
  • Knoche, R
  • Larsen, NA
  • Lee, C
  • Lenardo, BG
  • Lesko, KT
  • Lindote, A
  • Lopes, MI
  • Manalaysay, A
  • Mannino, RL
  • Marzioni, MF
  • McKinsey, DN
  • Mei, DM
  • Mock, J
  • Moongweluwan, M
  • Morad, JA
  • Murphy, ASJ
  • Nehrkorn, C
  • Nelson, HN
  • Neves, F
  • O'Sullivan, K
  • Oliver-Mallory, KC
  • Palladino, KJ
  • Pease, EK
  • Reichhart, L
  • et al.
Abstract

© 2018 American Physical Society. The LUX experiment has performed searches for dark-matter particles scattering elastically on xenon nuclei, leading to stringent upper limits on the nuclear scattering cross sections for dark matter. Here, for results derived from 1.4×104 kg days of target exposure in 2013, details of the calibration, event-reconstruction, modeling, and statistical tests that underlie the results are presented. Detector performance is characterized, including measured efficiencies, stability of response, position resolution, and discrimination between electron- and nuclear-recoil populations. Models are developed for the drift field, optical properties, background populations, the electron- and nuclear-recoil responses, and the absolute rate of low-energy background events. Innovations in the analysis include in situ measurement of the photomultipliers' response to xenon scintillation photons, verification of fiducial mass with a low-energy internal calibration source, and new empirical models for low-energy signal yield based on large-sample, in situ calibrations.

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