Edinburgh Research Explorer

Liquid xenon scintillation measurements and pulse shape discrimination in the LUX dark matter detector

Research output: Contribution to journalArticle

  • D. S. Akerib
  • S. Alsum
  • H. M. Araújo
  • X. Bai
  • A. J. Bailey
  • J. Balajthy
  • A. Bernstein
  • T. P. Biesiadzinski
  • E. M. Boulton
  • P. Brás
  • D. Byram
  • M. C. Carmona-benitez
  • A. Currie
  • J. E. Cutter
  • T. J. R. Davison
  • A. Dobi
  • E. Druszkiewicz
  • B. N. Edwards
  • S. R. Fallon
  • A. Fan
  • S. Fiorucci
  • R. J. Gaitskell
  • J. Genovesi
  • M. G. D. Gilchriese
  • S. J. Haselschwardt
  • S. A. Hertel
  • D. P. Hogan
  • M. Horn
  • D. Q. Huang
  • C. M. Ignarra
  • R. G. Jacobsen
  • W. Ji
  • K. Kamdin
  • K. Kazkaz
  • D. Khaitan
  • R. Knoche
  • B. G. Lenardo
  • K. T. Lesko
  • A. Lindote
  • M. I. Lopes
  • A. Manalaysay
  • R. L. Mannino
  • M. F. Marzioni
  • D. N. Mckinsey
  • D.-m. Mei
  • J. Mock
  • M. Moongweluwan
  • J. A. Morad
  • C. Nehrkorn
  • H. N. Nelson
  • F. Neves
  • K. O’sullivan
  • K. C. Oliver-mallory
  • K. J. Palladino
  • E. K. Pease
  • C. Rhyne
  • S. Shaw
  • T. A. Shutt
  • C. Silva
  • M. Solmaz
  • V. N. Solovov
  • P. Sorensen
  • T. J. Sumner
  • M. Szydagis
  • B. P. Tennyson
  • P. A. Terman
  • D. R. Tiedt
  • W. H. To
  • M. Tripathi
  • L. Tvrznikova
  • U. Utku
  • S. Uvarov
  • V. Velan
  • J. R. Verbus
  • R. C. Webb
  • T. J. Whitis
  • M. S. Witherell
  • F. L. H. Wolfs
  • K. Yazdani

Related Edinburgh Organisations

Open Access permissions

Open

Documents

https://link.aps.org/doi/10.1103/PhysRevD.97.112002
Original languageEnglish
Article number112002
Number of pages16
JournalPhysical Review D
Volume97
Issue number11
DOIs
Publication statusPublished - 11 Jun 2018

Abstract

Weakly interacting massive particles (WIMPs) are a leading candidate for dark matter and are expected to produce nuclear recoil (NR) events within liquid xenon time-projection chambers. We present a measurement of the scintillation timing characteristics of liquid xenon in the LUX dark matter detector and develop a pulse shape discriminant to be used for particle identification. To accurately measure the timing characteristics, we develop a template-fitting method to reconstruct the detection times of photons. Analyzing calibration data collected during the 2013–2016 LUX WIMP search, we provide a new measurement of the singlet-to-triplet scintillation ratio for electron recoils (ER) below 46 keV, and we make, to our knowledge, a first-ever measurement of the NR singlet-to-triplet ratio at recoil energies below 74 keV. We exploit the difference of the photon time spectra for NR and ER events by using a prompt fraction discrimination parameter, which is optimized using calibration data to have the least number of ER events that occur in a 50% NR acceptance region. We then demonstrate how this discriminant can be used in conjunction with the charge-to-light discrimination to possibly improve the signal-to-noise ratio for nuclear recoils.

Download statistics

No data available

ID: 75948137