Constraints on Sub-GeV Dark-Matter-Electron Scattering from the DarkSide-50 Experiment

Agnes, P; Albuquerque, I; Alexander, T; Alton, A; Araujo, G; Asner, D; Ave, M; Back, H; Baldin, B; Batignani, G; Biery, K; Bocci, V; Bonfini, G; Bonivento, W; Bottino, B; Budano, F; Bussino, S; Cadeddu, M; Cadoni, M; Calaprice, F; Caminata, A; Canci, N; Candela, A; Caravati, M; Cariello, M; Carlini, M; Carpinelli, M; Catalanotti, S; Cataudella, V; Cavalcante, P; Cavuoti, S; Cereseto, R; Chepurnov, A; Cicalò, C; Cifarelli, L; Cocco, A; Covone, G; D'Angelo, D; D'Incecco, M; D'Urso, D; Davini, S; De Candia, A; De Cecco, S; De Deo, M; De Filippis, G; De Rosa, G; De Vincenzi, M; Demontis, P; Derbin, A; Devoto, A; Di Eusanio, F; Di Pietro, G; Dionisi, C; Downing, M; Edkins, E; Empl, A; Fan, A; Fiorillo, G; Fomenko, K; Franco, D; Gabriele, F; Gabrieli, A; Galbiati, C; Garcia Abia, P; Ghiano, C; Giagu, S; Giganti, C; Giovanetti, G; Gorchakov, O; Goretti, A; Granato, F; Gromov, M; Guan, M; Guardincerri, Y; Gulino, M; Hackett, B; Hassanshahi, M; Herner, K; Hosseini, B; Hughes, D; Humble, P; Hungerford, E; Ianni, A; Ianni, A; Ippolito, V; James, I; Johnson, T; Kahn, Y; Keeter, K; Kendziora, C; Kochanek, I; Koh, G; Korablev, D; Korga, G; Kubankin, A; Kuss, M; La Commara, M; Lai, M; Li, X; Lisanti, M; Lissia, M; Loer, B; Longo, G; Ma, Y; Machado, A; Machulin, I; Mandarano, A; Mapelli, L; Mari, S; Maricic, J; Martoff, C; Messina, A; Meyers, P; Milincic, R; Mishra-Sharma, S; Monte, A; Morrocchi, M; Mount, B; Muratova, V; Musico, P; Nania, R; Navrer Agasson, A; Nozdrina, A; Oleinik, A; Orsini, M; Ortica, F; Pagani, L; Pallavicini, M; Pandola, L; Pantic, E; Paoloni, E; Pazzona, F; Pelczar, K; Pelliccia, N; Pesudo, V; Picciau, E; Pocar, A; Pordes, S; Poudel, S; Pugachev, D; Qian, H; Ragusa, F; Razeti, M; Razeto, A; Reinhold, B; Renshaw, A; Rescigno, M; Riffard, Q; Romani, A; Rossi, B; Rossi, N; Sablone, D; Samoylov, O; Sands, W; Sanfilippo, S; Sant, M; Santorelli, R; Savarese, C; Scapparone, E; Schlitzer, B; Segreto, E; Semenov, D; Shchagin, A; Sheshukov, A; Singh, P; Skorokhvatov, M; Smirnov, O; Sotnikov, A; Stanford, C; Stracka, S; Suffritti, G; Suvorov, Y; Tartaglia, R; Testera, G; Tonazzo, A; Trinchese, P; Unzhakov, E; Verducci, M; Vishneva, A; Vogelaar, B; Wada, M; Waldrop, T; Wang, H; Wang, Y; Watson, A; Westerdale, S; Wojcik, M; Wojcik, M; Xiang, X; Xiao, X; Yang, C; Ye, Z; Zhu, C; Zichichi, A; Zuzel, G

doi:10.1103/PhysRevLett.121.111303

We present new constraints on sub-GeV dark-matter particles scattering off electrons based on 6780.0 kg d of data collected with the DarkSide-50 dual-phase argon time projection chamber. This analysis uses electroluminescence signals due to ionized electrons extracted from the liquid argon target. The detector has a very high trigger probability for these signals, allowing for an analysis threshold of three extracted electrons, or approximately 0.05 keVee. We calculate the expected recoil spectra for dark matter-electron scattering in argon and, under the assumption of momentum-independent scattering, improve upon existing limits from XENON10 for dark-matter particles with masses between 30 and 100 MeV/c2.

Agnes, P., Albuquerque, I., Alexander, T., Alton, A., Araujo, G., Asner, D., et al. (2018). Constraints on Sub-GeV Dark-Matter-Electron Scattering from the DarkSide-50 Experiment. PHYSICAL REVIEW LETTERS, 121(11) [10.1103/PhysRevLett.121.111303].