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.

Agnes, P., Albuquerque, I. . ., Alexander, T., Alton, A. ., Araujo, G. ., Asner, D. ., et al. (2018). Constraints on Sub-GeV Dark-Matter–Electron Scattering from the DarkSide-50 Experiment. PHYSICAL REVIEW LETTERS, 121(11) [10.1103/PhysRevLett.121.111303].

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

Budano, F.
Membro del Collaboration Group
;
Bussino, S.
Membro del Collaboration Group
;
De Vincenzi, M.
Membro del Collaboration Group
;
James, I.
Membro del Collaboration Group
;
Mari, S. M.
Membro del Collaboration Group
;
Sanfilippo, S.
Membro del Collaboration Group
;
Tonazzo, A.
Membro del Collaboration Group
;
Verducci, M.
Membro del Collaboration Group
;
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/c2.
Agnes, P., Albuquerque, I. . ., Alexander, T., Alton, A. ., Araujo, G. ., Asner, D. ., et al. (2018). Constraints on Sub-GeV Dark-Matter–Electron Scattering from the DarkSide-50 Experiment. PHYSICAL REVIEW LETTERS, 121(11) [10.1103/PhysRevLett.121.111303].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/339098
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