Open AccessJournal Article
New Measurement of the Scintillation Efficiency of Low Energy Nuclear Recoils in Liquid Xenon
Guillaume Plante,Elena Aprile,Ran Budnik,Bin Choi,Karl Giboni,R.F. Lang,K. E. Lim,A. J. Melgarejo Fernandez +7 more
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TLDR
In this article, a new LXe scintillation detector has been designed and built specifically for the measurement of Leff at low energies, with an emphasis on maximizing the SCINTillation light detection efficiency to obtain the lowest possible energy threshold.Abstract:
Particle detectors that use liquid xenon (LXe) as detection medium are among the leading technologies in the search for dark matter weakly interacting massive particles (WIMPs). A key enabling element has been the low-energy detection threshold for recoiling nuclei produced by the interaction of WIMPs in LXe targets. In these detectors, the nuclear recoil energy scale is based on the LXe scintillation signal and thus requires knowledge of the relative scintillation efficiency of nuclear recoils, Leff. The uncertainty in Leff at low energies is the largest systematic uncertainty in the reported results from LXe WIMP searches at low masses. In the context of the XENON Dark Matter project, a new LXe scintillation detector has been designed and built specifically for the measurement of Leff at low energies, with an emphasis on maximizing the scintillation light detection efficiency to obtain the lowest possible energy threshold. We report new measurements of Leff at low energies performed with this detector. Our results suggest a Leff which slowly decreases with energy, from 0.144 +/- 0.009 at 15 keV down to 0.088 +0.014 -0.015 at 3 keV.read more
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Dark matter attempts for CoGeNT and DAMA
Thomas Schwetz,Jure Zupan +1 more
TL;DR: In this paper, the authors analyzed the compatibility of CoGeNT and DAMA/LIBRA signals within the hypothesis of dark matter scattering on nuclei, taking into account existing experimental constraints.
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Can CoGeNT and DAMA Modulations Be Due to Dark Matter
Marco Farina,Duccio Pappadopulo,Alessandro Strumia,Alessandro Strumia,Tomer Volansky,Tomer Volansky +5 more
TL;DR: In this paper, the dark matter interpretation of the anomalies claimed by the DAMA and cogent experiments, in conjunction with the various null direct-detection experiments, is explored and several experimental and astrophysical uncertainties are considered.
Journal ArticleDOI
Technical Results from the Surface Run of the LUX Dark Matter Experiment
D. S. Akerib,X. Bai,Ethan Bernard,Adam Bernstein,A. W. Bradley,D. Byram,Sidney Cahn,M. C. Carmona-Benitez,J.J. Chapman,T. Coffey,A. Dobi,E. M. Dragowsky,E. Druszkiewicz,B. N. Edwards,C.H. Faham,S. Fiorucci,R. J. Gaitskell,K.R. Gibson,Murdock Gilchriese,C. R. Hall,M. Hanhardt,M. Ihm,R. G. Jacobsen,L. Kastens,Kareem Kazkaz,R. Knoche,N. A. Larsen,C. Lee,K. T. Lesko,A. Lindote,M.I. Lopes,A. Lyashenko,D.C. Malling,R. L. Mannino,Daniel McKinsey,Dongming Mei,J. Mock,M. Moongweluwan,M. Morii,H. N. Nelson,F. Neves,James Nikkel,M. Pangilinan,K. Pech,P. Phelps,A. Rodionov,T. A. Shutt,C. Silva,W. Skulski,V. N. Solovov,P. Sorensen,T.M. Stiegler,M. Sweany,Matthew Szydagis,D. J. Taylor,Mani Tripathi,S. Uvarov,J.R. Verbus,L. de Viveiros,N. Walsh,R. C. Webb,J. T. White,M. Wlasenko,F.L.H. Wolfs,M. Woods,Chao Zhang +65 more
TL;DR: The results of the three-month above-ground commissioning run of the Large Underground Xenon (LUX) experiment at the Sanford Underground Research Facility located in Lead, South Dakota, USA are reported in this paper.
Journal ArticleDOI
Interplay between scintillation and ionization in liquid xenon Dark Matter searches
TL;DR: In this paper, a new way of constraining the relative scintillation eciency for liquid xenon was proposed, using a simple estimate for the electronic and nuclear stopping powers together with an analysis of recombination processes.
Journal ArticleDOI
WIMP dark matter direct-detection searches in noble gases
TL;DR: In this paper, the main properties of liquefied argon and xenon as WIMP targets are reviewed and discussed sources of background, as well as existing and planned detectors that employ the so-called single and dual-phase detection techniques, addressing their complementarity and science reach.
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