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Search for annual and diurnal rate modulations in the LUX experiment

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Title: Search for annual and diurnal rate modulations in the LUX experiment
Authors: Akerib, DS
Alsum, S
Araujo, HM
Bai, X
Balajthy, J
Beltrame, P
Bernard, EP
Bernstein, A
Biesiadzinski, TP
Boulton, EM
Boxer, B
Bras, P
Burdin, S
Byram, D
Carmona-Benitez, MC
Chan, C
Cutter, JE
Davison, TJR
Druszkiewicz, E
Fallon, SR
Fan, A
Fiorucci, S
Gaitskell, RJ
Genovesi, J
Ghag, C
Gilchriese, MGD
Gwilliam, C
Hall, CR
Haselschwardt, SJ
Hertel, SA
Hogan, DP
Horn, M
Huang, DQ
Ignarra, CM
Jacobsen, RG
Ji, W
Kamdin, K
Kazkaz, K
Khaitan, D
Knoche, R
Korolkova, EV
Kravitz, S
Kudryavtsev, VA
Lenardo, BG
Lesko, KT
Liao, J
Lin, J
Lindote, A
Lopes, MI
Manalaysay, A
Mannino, RL
Marangou, N
Marzioni, MF
McKinsey, DN
Mei, D-M
Moongweluwan, M
Morad, JA
Murphy, ASJ
Nehrkorn, C
Nelson, HN
Neves, F
Oliver-Mallory, KC
Palladino, KJ
Pease, EK
Rischbieter, GRC
Rhyne, C
Rossiter, P
Shaw, S
Shutt, TA
Silva, C
Solmaz, M
Solovov, VN
Sorensen, P
Sumner, TJ
Szydagis, M
Taylor, DJ
Taylor, WC
Tennyson, BP
Terman, PA
Tiedt, DR
To, WH
Tripathi, M
Tvrznikova, L
Utku, U
Uvarov, S
Velan, V
Verbus, JR
Webb, RC
White, JT
Whitis, TJ
Witherell, MS
Wolfs, FLH
Woodward, D
Xu, J
Yazdani, K
Zhang, C
Item Type: Journal Article
Abstract: Various dark matter models predict annual and diurnal modulations of dark matter interaction rates in Earth-based experiments as a result of the Earth’s motion in the halo. Observation of such features can provide generic evidence for detection of dark matter interactions. This paper reports a search for both annual and diurnal rate modulations in the LUX dark matter experiment using over 20 calendar months of data acquired between 2013 and 2016. This search focuses on electron recoil events at low energies, where leptophilic dark matter interactions are expected to occur and where the DAMA experiment has observed a strong rate modulation for over two decades. By using the innermost volume of the LUX detector and developing robust cuts and corrections, we obtained a stable event rate of 2.3±0.2 cpd/keVee/tonne, which is among the lowest in all dark matter experiments. No statistically significant annual modulation was observed in energy windows up to 26 keVee. Between 2 and 6 keVee, this analysis demonstrates the most sensitive annual modulation search up to date, with 9.2σ tension with the DAMA/LIBRA result. We also report no observation of diurnal modulations above 0.2 cpd/keVee/tonne amplitude between 2 and 6 keVee.
Issue Date: 27-Sep-2018
Date of Acceptance: 27-Sep-2018
URI: http://hdl.handle.net/10044/1/71577
DOI: https://dx.doi.org/10.1103/PhysRevD.98.062005
ISSN: 1550-2368
Publisher: American Physical Society
Journal / Book Title: Physical Review D - Particles, Fields, Gravitation and Cosmology
Volume: 98
Issue: 6
Copyright Statement: © 2018 American Physical Society
Sponsor/Funder: Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
Science and Technology Facilities Council (STFC)
The Royal Society
Funder's Grant Number: ST/K006428/1 DMUK
ST/K001604/1
ST/K003208/1 DMUK
ST/H000992/1
IE120804
Keywords: Science & Technology
Physical Sciences
Astronomy & Astrophysics
Physics, Particles & Fields
Physics
DARK-MATTER
astro-ph.CO
astro-ph.CO
astro-ph.IM
hep-ex
physics.ins-det
Science & Technology
Physical Sciences
Astronomy & Astrophysics
Physics, Particles & Fields
Physics
DARK-MATTER
Publication Status: Published
Article Number: ARTN 062005
Appears in Collections:Physics
High Energy Physics



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