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 / c^2 .

Constraints on Sub-GeV Dark-Matter-Electron Scattering from the DarkSide-50 Experiment

Cataudella, V.;Cavuoti, S.
Membro del Collaboration Group
;
Covone, G.;De Candia, A.;De Filippis, G.
Membro del Collaboration Group
;
De Rosa, G.;Fiorillo, G.;La Commara, M.;Longo, G.;Suvorov, Y.;
2018

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 / c^2 .
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11588/726408
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