Publication: Search for Dark-Matter-Nucleon Interactions via Migdal Effect with DarkSide-50
Дата
2023
Авторы
Agnes, P.
Albuquerque, IFM.
Alexander, T.
Alton, A. K.
Grobov, A.
Machulin, I. N.
Nozdrina, A. O.
Skorokhvatov, M. D.
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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 (12 306 +/- 184) 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.
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Search for Dark-Matter-Nucleon Interactions via Migdal Effect with DarkSide-50 / Agnes, P [et al.] // PHYSICAL REVIEW LETTERS. - 2023. - 130. - № 10. - 10.1103/PhysRevLett.130.101001