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Agnes, P; Albuquerque, I F M; Alexander, T; Alton, A K; Batignani, G; Biery, K; Bocci, V; Bonivento, W M; Cadoni, M; Calaprice, F; Caminata, A; Canci, N; Cavalcante, P; Chashin, S; Chepurnov, A; Cicalò, C; Covone, G; D'Angelo, D; De Candia, A; De Cecco, S; De Rosa, G; Derbin, A V; Devoto, A; D'Incecco, M; Dionisi, C; Downing, M; D'Urso, D; Fairbairn, M; Franco, D; Gabriele, F; Galbiati, C; Ghiano, C; Giganti, C; Giovanetti, G K; Goretti, A M; Grilli di Cortona, G; Grobov, A; Gromov, M; Guan, M; Hackett, B R; Hessel, T; Hosseini, B; Hubaut, F; Hungerford, E V; Ianni, An; Ippolito, V; Keeter, K; Kendziora, C L; Kimura, M; Kochanek, I; Korga, G; La Commara, M; Longo, G; Lychagina, O; Machulin, I N; Mapelli, L P; Mari, S M; Maricic, J; Milincic, R; Monroe, J; Morrocchi, M; Mougeot, X; Muratova, V N; Musico, P; Oleinik, A; Ortica, F; Pagani, L; Pantic, E; Pelczar, K; Pelliccia, N; Poehlmann, D M; Pordes, S; Poudel, S S; Price, D D; Ragusa, F; Razeti, M; Razeto, A; Rescigno, M; Rode, J; Romani, A; Sablone, D; Samoylov, O; Sandford, E; Sands, W; Sanfilippo, S; Schlitzer, B; Semenov, D A; Skorokhvatov, M D; Smirnov, O; Sotnikov, A; Stracka, S; Suvorov, Y; Tartaglia, R; Tonazzo, A; Unzhakov, E V; Wada, M; Wang, H; Westerdale, S; Xiao, X; Zuzel, G
Physical review letters, 03/2023, Letnik: 130, Številka: 10Journal Article
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/c^{2} mass dark matter. We present new constraints for sub-GeV/c^{2} 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/c^{2}. Furthermore, it sets the most stringent upper limit on the spin independent dark matter nucleon cross section for masses below 3.6 GeV/c^{2}.
