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@article{Akerib:2018:10.1103/PhysRevD.97.112002,
author = {Akerib, DS and Alsum, S and Araujo, HM and Bai, X and Bailey, AJ and Balajthy, J and Beltrame, P and Bernard, EP and Bernstein, A and Biesiadzinski, TP and Boulton, EM and Bras, P and Byram, D and Carmona-Benitez, MC and Chan, C and Currie, A and Cutter, JE and Davison, TJR and Dobi, A and Druszkiewicz, E and Edwards, BN and Fallon, SR and Fan, A and Fiorucci, S and Gaitskell, RJ and Genovesi, J and Ghag, C and Gilchriese, MGD and Hall, CR and Haselschwardt, SJ and Hertel, SA and Hogan, DP and Horn, M and Huang, DQ and Ignarra, CM and Jacobsen, RG and Ji, W and Kamdin, K and Kazkaz, K and Khaitan, D and Knoche, R and Lenardo, BG and Lesko, KT and Liao, J and Lindote, A and Lopes, MI and Manalaysay, A and Mannino, RL and Marzioni, MF and McKinsey, DN and Mei, D-M and Mock, J and Moongweluwan, M and Morad, JA and Murphy, ASJ and Nehrkorn, C and Nelson, HN and Neves, F and O'Sullivan, K and Oliver-Mallory, KC and Palladino, KJ and Pease, EK and Rhyne, C and Shaw, S and Shutt, TA and Silva},
doi = {10.1103/PhysRevD.97.112002},
journal = {PHYSICAL REVIEW D},
title = {Liquid xenon scintillation measurements and pulse shape discrimination in the LUX dark matter detector},
url = {http://dx.doi.org/10.1103/PhysRevD.97.112002},
volume = {97},
year = {2018}
}

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TY  - JOUR
AB  - 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.
AU  - Akerib,DS
AU  - Alsum,S
AU  - Araujo,HM
AU  - Bai,X
AU  - Bailey,AJ
AU  - Balajthy,J
AU  - Beltrame,P
AU  - Bernard,EP
AU  - Bernstein,A
AU  - Biesiadzinski,TP
AU  - Boulton,EM
AU  - Bras,P
AU  - Byram,D
AU  - Carmona-Benitez,MC
AU  - Chan,C
AU  - Currie,A
AU  - Cutter,JE
AU  - Davison,TJR
AU  - Dobi,A
AU  - Druszkiewicz,E
AU  - Edwards,BN
AU  - Fallon,SR
AU  - Fan,A
AU  - Fiorucci,S
AU  - Gaitskell,RJ
AU  - Genovesi,J
AU  - Ghag,C
AU  - Gilchriese,MGD
AU  - Hall,CR
AU  - Haselschwardt,SJ
AU  - Hertel,SA
AU  - Hogan,DP
AU  - Horn,M
AU  - Huang,DQ
AU  - Ignarra,CM
AU  - Jacobsen,RG
AU  - Ji,W
AU  - Kamdin,K
AU  - Kazkaz,K
AU  - Khaitan,D
AU  - Knoche,R
AU  - Lenardo,BG
AU  - Lesko,KT
AU  - Liao,J
AU  - Lindote,A
AU  - Lopes,MI
AU  - Manalaysay,A
AU  - Mannino,RL
AU  - Marzioni,MF
AU  - McKinsey,DN
AU  - Mei,D-M
AU  - Mock,J
AU  - Moongweluwan,M
AU  - Morad,JA
AU  - Murphy,ASJ
AU  - Nehrkorn,C
AU  - Nelson,HN
AU  - Neves,F
AU  - O'Sullivan,K
AU  - Oliver-Mallory,KC
AU  - Palladino,KJ
AU  - Pease,EK
AU  - Rhyne,C
AU  - Shaw,S
AU  - Shutt,TA
AU  - Silva,C
AU  - Solmaz,M
AU  - Solovov,VN
AU  - Sorensen,P
AU  - Sumner,TJ
AU  - Szydagis,M
AU  - Taylor,DJ
AU  - Taylor,WC
AU  - Tennyson,BP
AU  - Terman,PA
AU  - Tiedt,DR
AU  - To,WH
AU  - Tripathi,M
AU  - Tvrznikova,L
AU  - Utku,U
AU  - Uvarov,S
AU  - Velan,V
AU  - Verbus,JR
AU  - Webb,RC
AU  - White,JT
AU  - Whitis,TJ
AU  - Witherell,MS
AU  - Wolfs,FLH
AU  - Xu,J
AU  - Yazdani,K
AU  - Young,SK
AU  - Zhang,C
DO  - 10.1103/PhysRevD.97.112002
PY  - 2018///
SN  - 2470-0010
TI  - Liquid xenon scintillation measurements and pulse shape discrimination in the LUX dark matter detector
T2  - PHYSICAL REVIEW D
UR  - http://dx.doi.org/10.1103/PhysRevD.97.112002
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000434764200001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/60395
VL  - 97
ER  -

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