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.

Constraints on Sub-GeV Dark-Matter-Electron Scattering from the DarkSide-50 Experiment / Agnes, P., Albuquerque, I.F.M., Alexander, T., Alton, A.K., Araujo, G.R., Asner, D.M., Ave, M., Back, H.O., Baldin, B., Batignani, G., Biery, K., Bocci, V., Bonfini, G., Bonivento, W., Bottino, B., Budano, F., Bussino, S., Cadeddu, M., Cadoni, M., Calaprice, F., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 121:11(2018). [10.1103/PhysRevLett.121.111303]

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

Carpinelli, M.;D'Urso, D.;Demontis, P.;Pazzona, F.;Suffritti, G. B.;
2018-01-01

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.
2018
Constraints on Sub-GeV Dark-Matter-Electron Scattering from the DarkSide-50 Experiment / Agnes, P., Albuquerque, I.F.M., Alexander, T., Alton, A.K., Araujo, G.R., Asner, D.M., Ave, M., Back, H.O., Baldin, B., Batignani, G., Biery, K., Bocci, V., Bonfini, G., Bonivento, W., Bottino, B., Budano, F., Bussino, S., Cadeddu, M., Cadoni, M., Calaprice, F., et al.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 121:11(2018). [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/11388/215526
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