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 matterelectron 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

Agnes P;Galbiati C;
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 matterelectron 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).
File in questo prodotto:
File Dimensione Formato  
PrePrint_2018_PhysRevLett_121_111303_Agnes.pdf

accesso aperto

Tipologia: Documento in Pre-print
Licenza: Accesso gratuito
Dimensione 413.16 kB
Formato Adobe PDF
413.16 kB Adobe PDF Visualizza/Apri
PostPrint_2018_PhysRevLett_121_111303_Agnes.pdf

accesso aperto

Tipologia: Documento in Post-print
Licenza: Creative commons
Dimensione 469.38 kB
Formato Adobe PDF
469.38 kB Adobe PDF Visualizza/Apri

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.12571/1929
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 203
  • ???jsp.display-item.citation.isi??? 157
social impact