@article{d899351013f848f88c7224bda407e175,
title = "Results of a Search for Sub-GeV Dark Matter Using 2013 LUX Data",
abstract = "The scattering of dark matter (DM) particles with sub-GeV masses off nuclei is difficult to detect using liquid xenon-based DM search instruments because the energy transfer during nuclear recoils is smaller than the typical detector threshold. However, the tree-level DM-nucleus scattering diagram can be accompanied by simultaneous emission of a bremsstrahlung photon or a so-called {"}Migdal{"} electron. These provide an electron recoil component to the experimental signature at higher energies than the corresponding nuclear recoil. The presence of this signature allows liquid xenon detectors to use both the scintillation and the ionization signals in the analysis where the nuclear recoil signal would not be otherwise visible. We report constraints on spin-independent DM-nucleon scattering for DM particles with masses of 0.4-5 GeV/c2 using 1.4×104 kg day of search exposure from the 2013 data from the Large Underground Xenon (LUX) experiment for four different classes of mediators. This analysis extends the reach of liquid xenon-based DM search instruments to lower DM masses than has been achieved previously.",
author = "{(LUX Collaboration)} and Akerib, {D. S.} and S. Alsum and Ara{\'u}jo, {H. M.} and X. Bai and J. Balajthy and P. Beltrame and Bernard, {E. P.} and A. Bernstein and Biesiadzinski, {T. P.} and Boulton, {E. M.} and B. Boxer and P. Br{\'a}s and S. Burdin and D. Byram and Carmona-Benitez, {M. C.} and C. Chan and Cutter, {J. E.} and Davison, {T. J.R.} and E. Druszkiewicz and Fallon, {S. R.} and A. Fan and S. Fiorucci and Gaitskell, {R. J.} and J. Genovesi and C. Ghag and Gilchriese, {M. G.D.} and C. Gwilliam and Hall, {C. R.} and Haselschwardt, {S. J.} and Hertel, {S. A.} and Hogan, {D. P.} and M. Horn and Huang, {D. Q.} and Ignarra, {C. M.} and Jacobsen, {R. G.} and O. Jahangir and W. Ji and K. Kamdin and K. Kazkaz and D. Khaitan and R. Knoche and Korolkova, {E. V.} and S. Kravitz and Kudryavtsev, {V. A.} and Lenardo, {B. G.} and Lesko, {K. T.} and J. Liao and J. Lin and A. Lindote and Lopes, {M. I.}",
note = "Funding Information: The authors would to thank Rouven Essig, Masahiro Ibe, Christopher McCabe, Josef Pradler, and Kathryn Zurek for helpful conversations and correspondence. We would also like to thank the referees for their constructive comments and recommendations. This Letter was partially supported by the U.S. Department of Energy (DOE) under Awards No. DE-AC02-05CH11231, No. DE-AC05-06OR23100, No. DE-AC52-07NA27344, No. DE-FG01-91ER40618, No. DE-FG02-08ER41549, No. DE-FG02-11ER41738, No. DE-FG02-91ER40674, No. DE-FG02-91ER40688, No. DE-FG02-95ER40917, No. DE-NA0000979, No. DE-SC0006605, No. DE-SC0010010, No. DE-SC0015535, and No. DE-SC0019066; the U.S. National Science Foundation under Grants No. PHY-0750671, No. PHY-0801536, No. PHY-1003660, No. PHY-1004661, No. PHY-1102470, No. PHY-1312561, No. PHY-1347449, No. PHY-1505868, and No. PHY-1636738; the Research Corporation Grant No. RA0350; the Center for Ultra-low Background Experiments in the Dakotas (CUBED); and the South Dakota School of Mines and Technology (SDSMT). Laborat{\'o}rio de Instrumenta{\c c}{\~a}o e F{\'i}sica Experimental de Part{\'i}culas (LIP)-Coimbra acknowledges funding from Funda{\c c}{\~a}o para a Ci{\^e}ncia e a Tecnologia (FCT) through the Project-Grant No. PTDC/FIS-NUC/1525/2014. Imperial College and Brown University thank the UK Royal Society for travel funds under the International Exchange Scheme (IE120804). The UK groups acknowledge institutional support from Imperial College London, University College London and Edinburgh University, and from the Science & Technology Facilities Council for Grants No. ST/K502042/1 (A. B.), No. ST/K502406/1 (S. S.), and No. ST/M503538/1 (K. Y.). The University of Edinburgh is a charitable body, registered in Scotland, with Registration No. SC005336. This research was conducted using computational resources and services at the Center for Computation and Visualization, Brown University, and also the Yale Science Research Software Core. We gratefully acknowledge the logistical and technical support and the access to laboratory infrastructure provided to us by SURF and its personnel at Lead, South Dakota. SURF was developed by the South Dakota Science and Technology Authority, with an important philanthropic donation from T. Denny Sanford. Its operation is funded through Fermi National Accelerator Laboratory by the Department of Energy, Office of High Energy Physics. Publisher Copyright: {\textcopyright} 2019 American Physical Society.",
year = "2019",
month = apr,
day = "1",
doi = "10.1103/PhysRevLett.122.131301",
language = "English (US)",
volume = "122",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "13",
}