Dark matter elastic scattering off nuclei can result in the excitation and ionization of the recoiling atom through the so-called Migdal effect. The energy deposition from the ionization electron adds to the energy deposited by the recoiling nuclear system and allows for the detection of interactions of sub-GeV=c2 mass dark matter. We present new constraints for sub-GeV=c2 dark matter using the dual-phase liquid argon time projection chamber of the DarkSide-50 experiment with an exposure of ð12 306 184Þ kg d. The analysis is based on the ionization signal alone and significantly enhances the sensitivity of DarkSide-50, enabling sensitivity to dark matter with masses down to 40 MeV=c2 . Furthermore, it sets the most stringent upper limit on the spin independent dark matter nucleon cross section for masses below 3.6 GeV=c2.

Agnes, P., Albuquerque, I. . ., Alexander, T., Alton, A. ., Ave, M., Back, H. ., et al. (2023). Search for Dark-Matter–Nucleon Interactions via Migdal Effect with DarkSide-50. PHYSICAL REVIEW LETTERS, 130(10), 101001 [10.1103/PhysRevLett.130.101001].

Search for Dark-Matter–Nucleon Interactions via Migdal Effect with DarkSide-50

Bussino, S.
Membro del Collaboration Group
;
Mari, S. M.
Membro del Collaboration Group
;
Sanfilippo, S.
Membro del Collaboration Group
;
2023-01-01

Abstract

Dark matter elastic scattering off nuclei can result in the excitation and ionization of the recoiling atom through the so-called Migdal effect. The energy deposition from the ionization electron adds to the energy deposited by the recoiling nuclear system and allows for the detection of interactions of sub-GeV=c2 mass dark matter. We present new constraints for sub-GeV=c2 dark matter using the dual-phase liquid argon time projection chamber of the DarkSide-50 experiment with an exposure of ð12 306 184Þ kg d. The analysis is based on the ionization signal alone and significantly enhances the sensitivity of DarkSide-50, enabling sensitivity to dark matter with masses down to 40 MeV=c2 . Furthermore, it sets the most stringent upper limit on the spin independent dark matter nucleon cross section for masses below 3.6 GeV=c2.
2023
Agnes, P., Albuquerque, I. . ., Alexander, T., Alton, A. ., Ave, M., Back, H. ., et al. (2023). Search for Dark-Matter–Nucleon Interactions via Migdal Effect with DarkSide-50. PHYSICAL REVIEW LETTERS, 130(10), 101001 [10.1103/PhysRevLett.130.101001].
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11590/431523
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