The DarkSide-50 Collaboration; Agnes, P; Alton, A K; Back, H O; Batignani, G; Biery, K; Bonivento, W M; Bussino, S; Cadeddu, M; Calaprice, F; Campos, M D; Canci, N; Cariello, M; Cavalcante, P; Chashin, S; Chepurnov, A; Cicalò, C; D'Angelo, D; Davini, S; De Candia, A; De Cecco, S; De Rosa, G; Derbin, A V; D'Incecco, M; Dordei, F; Downing, M; D'Urso, D; Fairbairn, M; Fiorillo, G; Gabriele, F; Galbiati, C; Giganti, C; Giovanetti, G K; G Grilli di Cortona; Gromov, M; Guan, M; Hackett, B R; Herner, K; Hessel, T; Hosseini, B; Hubaut, F; Ianni, An; Ippolito, V; Kendziora, C L; Kimura, M; Kochanek, I; Korablev, D; Kubankin, A; Kuss, M; Kuźniak, M; Lissia, M; Longo, G; Lychagina, O; Mari, S M; Messina, A; Milincic, R; Muratova, V N; Musico, P; Nozdrina, A O; Oleinik, A; Ortica, F; Pagani, L; Pallavicini, M; Pandola, L; Paoloni, E; Pelczar, K; Piacentini, S; Pocar, A; Poehlmann, D M; Pordes, S; Poudel, S S; Pralavorio, P; Ragusa, F; Razeti, M; Razeto, A; Rescigno, M; Rode, J; Romani, A; Samoylov, O; Sandford, E; Sands, W; Sanfilippo, S; Schlitzer, B; Semenov, D A; Sheshukov, A; Skorokhvatov, M D; Smirnov, O; Sotnikov, A; Stracka, S; Tartaglia, R; Testera, G; Tonazzo, A; Unzhakov, E V; Vishneva, A; Vogelaar, R B; Wada, M; Wang, Y; Wojcik, M M; Yang, C; Zuzel, G