@article{23a7c1ff370b4a40868eddffdc06b6f3,
title = "Constraints on Sub-GeV Dark-Matter-Electron Scattering from the DarkSide-50 Experiment",
abstract = "We present new constraints on sub-GeV dark-matter particles scattering off electrons based on 6780.0 kg d of data collected with the DarkSide-50 dual-phase argon time projection chamber. This analysis uses electroluminescence signals due to ionized electrons extracted from the liquid argon target. The detector has a very high trigger probability for these signals, allowing for an analysis threshold of three extracted electrons, or approximately 0.05 keVee. We calculate the expected recoil spectra for dark matter-electron scattering in argon and, under the assumption of momentum-independent scattering, improve upon existing limits from XENON10 for dark-matter particles with masses between 30 and 100 MeV/c2.",
author = "{The DarkSide Collaboration} and P. Agnes and Albuquerque, {I. F.M.} and T. Alexander and Alton, {A. K.} and Araujo, {G. R.} and Asner, {D. M.} and M. Ave and Back, {H. O.} and B. Baldin and G. Batignani and K. Biery and V. Bocci and G. Bonfini and W. Bonivento and B. Bottino and F. Budano and S. Bussino and M. Cadeddu and M. Cadoni and F. Calaprice and A. Caminata and N. Canci and A. Candela and M. Caravati and M. Cariello and M. Carlini and M. Carpinelli and S. Catalanotti and V. Cataudella and P. Cavalcante and S. Cavuoti and R. Cereseto and A. Chepurnov and C. Cical{\`o} and L. Cifarelli and Cocco, {A. G.} and G. Covone and D. D'Angelo and M. D'Incecco and D. D'Urso and S. Davini and {De Candia}, A. and {De Cecco}, S. and {De Deo}, M. and {De Filippis}, G. and {De Rosa}, G. and {De Vincenzi}, M. and C. Galbiati and M. Lisanti and Meyers, {P. D.}",
note = "Funding Information: The DarkSide Collaboration offers its profound gratitude to the LNGS and its staff for their invaluable technical and logistical support. We also thank the Fermilab Particle Physics, Scientific, and Core Computing Divisions. Construction and operation of the DarkSide-50 detector was supported by the U.S. National Science Foundation (NSF) (Grants No. PHY-0919363, No. PHY-1004072, No. PHY-1004054, No. PHY-1242585, No. PHY-1314483, No. PHY-1314501, No. PHY-1314507, No. PHY-1352795, No. PHY-1622415, and associated collaborative grants No. PHY-1211308 and No. PHY-1455351), the Italian Istituto Nazionale di Fisica Nucleare, the U.S. Department of Energy (Contracts No. DE-FG02-91ER40671, No. DE-AC02-07CH11359, and No. DE-AC05-76RL01830), the Russian Science Foundation (Grant No. 16-12-10369), the Polish NCN (Grant No. UMO-2014/15/B/ST2/02561) and the Foundation for Polish Science (Grant No. Team2016-2/17). We also acknowledge financial support from the French Istituto National de Physique Nucl{\'e}aire et de Physique des Particules (IN2P3), from the UnivEarthS Labex program of Sorbonne Paris Cit{\'e} (Grants No. ANR-10-LABX-0023 and No. ANR-11-IDEX-0005-02), and from the S{\~a}o Paulo Research Foundation (FAPESP) (Grant No. 2016/09084-0).",
year = "2018",
month = sep,
day = "12",
doi = "10.1103/PhysRevLett.121.111303",
language = "English (US)",
volume = "121",
journal = "Physical Review Letters",
issn = "0031-9007",
publisher = "American Physical Society",
number = "11",
}