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

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 interaction...

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Veröffentlicht in:	Physical review letters 2023-03, Vol.130 (10), p.101001-101001, Article 101001
Hauptverfasser:	Agnes, P, Albuquerque, I F M, Alexander, T, Alton, A K, Ave, M, Back, H O, Batignani, G, Biery, K, Bocci, V, Bonivento, W M, Bottino, B, Bussino, S, Cadeddu, M, Cadoni, M, Calaprice, F, Caminata, A, Campos, M D, Canci, N, Caravati, M, Cargioli, N, Cariello, M, Carlini, M, Cataudella, V, Cavalcante, P, Cavuoti, S, Chashin, S, Chepurnov, A, Cicalò, C, Covone, G, D'Angelo, D, Davini, S, De Candia, A, De Cecco, S, De Filippis, G, De Rosa, G, Derbin, A V, Devoto, A, D'Incecco, M, Dionisi, C, Dordei, F, Downing, M, D'Urso, D, Fairbairn, M, Fiorillo, G, 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, Gulino, M, Hackett, B R, Herner, K, Hessel, T, Hosseini, B, Hubaut, F, Hungerford, E V, Ianni, An, Ippolito, V, Keeter, K, Kendziora, C L, Kimura, M, Kochanek, I, Korablev, D, Korga, G, Kubankin, A, Kuss, M, La Commara, M, Lai, M, Li, X, Lissia, M, Longo, G, Lychagina, O, Machulin, I N, Mapelli, L P, Mari, S M, Maricic, J, Messina, A, Milincic, R, Monroe, J, Morrocchi, M, Mougeot, X, Muratova, V N, Musico, P, Nozdrina, A O, Oleinik, A, Ortica, F, Pagani, L, Pallavicini, M, Pandola, L, Pantic, E, Paoloni, E, Pelczar, K, Pelliccia, N, Piacentini, S
Format:	Artikel
Sprache:	eng
Schlagworte:	High Energy Physics - Experiment Instrumentation and Detectors Physics
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Zusammenfassung:	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}.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.130.101001