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  • Low-Mass Dark Matter Search...
    Albuquerque, I F M; Araujo, G R; Back, H O; Batignani, G; Biery, K; Bottino, B; Budano, F; Cadoni, M; Caminata, A; Canci, N; Candela, A; Caravati, M; Catalanotti, S; Cavalcante, P; Cavuoti, S; Cereseto, R; Cicalò, C; Cifarelli, L; Covone, G; D'Angelo, D; D'Incecco, M; D'Urso, D; De Candia, A; De Cecco, S; De Deo, M; Derbin, A V; Di Pietro, G; Dionisi, C; Downing, M; Edkins, E; Fan, A; Fiorillo, G; Fomenko, K; Gabriele, F; Gabrieli, A; Galbiati, C; Ghiano, Chiara; Giganti, C; Giovanetti, G K; Goretti, A M; Guan, M; Guardincerri, Y; Gulino, M; Hackett, B R; Hassanshahi, M H; Hosseini, B; Humble, P; Ianni, Al; Ianni, An; Ippolito, V; James, I; Johnson, T N; Keeter, K; Kendziora, C L; Kochanek, I; Korga, G; Kuss, M; Lai, M; Li, X; Lissia, M; Loer, B; Longo, G; Ma, Y; Machado, A A; Machulin, I N; Martoff, C J; Messina, A; Milincic, R; Muratova, V N; Musico, P; Nozdrina, A O; Pallavicini, M; Pandola, L; Pantic, E; Paoloni, E; Pelczar, K; Pelliccia, N; Poudel, S S; Riffard, Q; Romani, A; Rossi, N; Sablone, D; Samoylov, O; Sands, W; Sanfilippo, S; Santorelli, R; Savarese, C; Scapparone, E; Singh, P N; Smirnov, O; Stanford, C; Suvorov, Y; Tartaglia, R; Tonazzo, A; Vogelaar, B; Waldrop, T J; Wang, H; Watson, A W; Xiao, X; Ye, Z

    Physical review letters, 2018-Aug-24, Letnik: 121, Številka: 8
    Journal Article

    We present the results of a search for dark matter weakly interacting massive particles (WIMPs) in the mass range below 20  GeV/c^{2} using a target of low-radioactivity argon with a 6786.0 kg d exposure. The data were obtained using the DarkSide-50 apparatus at Laboratori Nazionali del Gran Sasso. The analysis is based on the ionization signal, for which the DarkSide-50 time projection chamber is fully efficient at 0.1  keVee. The observed rate in the detector at 0.5  keVee is about 1.5  event/keVee/kg/d and is almost entirely accounted for by known background sources. We obtain a 90% C.L. exclusion limit above 1.8  GeV/c^{2} for the spin-independent cross section of dark matter WIMPs on nucleons, extending the exclusion region for dark matter below previous limits in the range 1.8-6  GeV/c^{2}.