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@article{Akerib:2020:10.1103/PhysRevD.102.112002,
author = {Akerib, DS and Alsum, S and Araujo, HM and Bai, X and Balajthy, J and Baxter, A and Bernard, EP and Bernstein, A and Biesiadzinski, TP and Boulton, EM and Boxer, B and Bras, P and Burdin, S and Byram, D and Carmona-Benitez, MC and Chan, C and Cutter, JE and de, Viveiros L and Druszkiewicz, E and Fan, A and Fiorucci, S and Gaitskell, RJ and Ghag, C and Gilchriese, MGD and Gwilliam, C 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 Jahangir, O and Ji, W and Kamdin, K and Kazkaz, K and Khaitan, D and Korolkova, E and Kravitz, S and Kudryavtsev, VA and Leason, E and Lenardo, BG and Lesko, KT and Liao, J and Lin, J and Lindote, A and Lopes, M and Manalaysay, A and Mannino, RL and Marangou, N and McKinsey, DN and Mei, D-M and Moongweluwan, M and Morad, JA and Murphy, ASJ and Naylor, A and Nehrkorn, C and Nelson, HN and Neves, F and Nilima, A and Oliver-Mallory, KC and Palladino, KJ and Pease, EK and Riffard, Q and},
doi = {10.1103/PhysRevD.102.112002},
journal = {Physical Review D: Particles, Fields, Gravitation and Cosmology},
pages = {1--27},
title = {Discrimination of electronic recoils from nuclear recoils in two-phase xenon time projection chambers},
url = {http://dx.doi.org/10.1103/PhysRevD.102.112002},
volume = {102},
year = {2020}
}

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TY  - JOUR
AB  - We present a comprehensive analysis of electronic recoil vs nuclear recoil discrimination in liquid/gas xenon time projection chambers, using calibration data from the 2013 and 2014–2016 runs of the Large Underground Xenon experiment. We observe strong charge-to-light discrimination enhancement with increased event energy. For events with S1=120 detected photons, i.e., equivalent to a nuclear recoil energy of ∼100  keV, we observe an electronic recoil background acceptance of <10−5 at a nuclear recoil signal acceptance of 50%. We also observe modest electric field dependence of the discrimination power, which peaks at a field of around 300  V/cm over the range of fields explored in this study (50–500  V/cm). In the weakly interacting massive particle search region of S1=1−80  phd, the minimum electronic recoil leakage we observe is (7.3±0.6)×10−4, which is obtained for a drift field of 240–290  V/cm. Pulse shape discrimination is utilized to improve our results, and we find that, at low energies and low fields, there is an additional reduction in background leakage by a factor of up to 3. We develop an empirical model for recombination fluctuations which, when used alongside the Noble Element Scintillation Technique simulation package, correctly reproduces the skewness of the electronic recoil data. We use this updated simulation to study the width of the electronic recoil band, finding that its dominant contribution comes from electron-ion recombination fluctuations, followed in magnitude of contribution by fluctuations in the S1 signal, fluctuations in the S2 signal, and fluctuations in the total number of quanta produced for a given energy deposition.
AU  - Akerib,DS
AU  - Alsum,S
AU  - Araujo,HM
AU  - Bai,X
AU  - Balajthy,J
AU  - Baxter,A
AU  - Bernard,EP
AU  - Bernstein,A
AU  - Biesiadzinski,TP
AU  - Boulton,EM
AU  - Boxer,B
AU  - Bras,P
AU  - Burdin,S
AU  - Byram,D
AU  - Carmona-Benitez,MC
AU  - Chan,C
AU  - Cutter,JE
AU  - de,Viveiros L
AU  - Druszkiewicz,E
AU  - Fan,A
AU  - Fiorucci,S
AU  - Gaitskell,RJ
AU  - Ghag,C
AU  - Gilchriese,MGD
AU  - Gwilliam,C
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  - Jahangir,O
AU  - Ji,W
AU  - Kamdin,K
AU  - Kazkaz,K
AU  - Khaitan,D
AU  - Korolkova,E
AU  - Kravitz,S
AU  - Kudryavtsev,VA
AU  - Leason,E
AU  - Lenardo,BG
AU  - Lesko,KT
AU  - Liao,J
AU  - Lin,J
AU  - Lindote,A
AU  - Lopes,M
AU  - Manalaysay,A
AU  - Mannino,RL
AU  - Marangou,N
AU  - McKinsey,DN
AU  - Mei,D-M
AU  - Moongweluwan,M
AU  - Morad,JA
AU  - Murphy,ASJ
AU  - Naylor,A
AU  - Nehrkorn,C
AU  - Nelson,HN
AU  - Neves,F
AU  - Nilima,A
AU  - Oliver-Mallory,KC
AU  - Palladino,KJ
AU  - Pease,EK
AU  - Riffard,Q
AU  - Rischbieter,GRC
AU  - Rhyne,C
AU  - Rossiter,P
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,R
AU  - Taylor,WC
AU  - Tennyson,BP
AU  - Terman,PA
AU  - Tiedt,DR
AU  - To,WH
AU  - Tvrznikova,L
AU  - Utku,U
AU  - Uvarov,S
AU  - Vacheret,A
AU  - Velan,V
AU  - Webb,RC
AU  - White,JT
AU  - Whitis,TJ
AU  - Witherell,MS
AU  - Wolfs,FLH
AU  - Woodward,D
AU  - Xu,J
AU  - Zhang,C
DO  - 10.1103/PhysRevD.102.112002
EP  - 27
PY  - 2020///
SN  - 1550-2368
SP  - 1
TI  - Discrimination of electronic recoils from nuclear recoils in two-phase xenon time projection chambers
T2  - Physical Review D: Particles, Fields, Gravitation and Cosmology
UR  - http://dx.doi.org/10.1103/PhysRevD.102.112002
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000594994400003&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://journals.aps.org/prd/abstract/10.1103/PhysRevD.102.112002
UR  - http://hdl.handle.net/10044/1/85720
VL  - 102
ER  -

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