V. Bocci⁹, W. M. Bonivento¹⁰, B. Bottino^11,12, S. Bussino^13,14, M. Cadeddu¹⁰, M. Cadoni^15,10, R. Calabrese^16,17, F. Calaprice¹⁸, A. Caminata¹², N. Canci¹, M. Caravati¹⁰, N. Cargioli¹⁰, M. Cariello¹², M. Carlini^1,2, P. Cavalcante^19,1, S. Chashin²⁰, A. Chepurnov²⁰, M. Chianese^21,17,16, D. D’Angelo^22,23, S. Davini¹², S. De Cecco^24,9, A. V. Derbin²⁵, M. D’Incecco¹, C. Dionisi^24,9, F. Dordei¹⁰, M. Downing²⁶, G. Fiorillo^16,17, D. Franco²⁷, F. Gabriele¹⁰, C. Galbiati^18,2,1, C. Ghiano¹, C. Giganti²⁸, G. K. Giovanetti¹⁸, A. M. Goretti¹, G. Grilli di Cortona^29,9, A. Grobov^30,31, M. Gromov^20,32, M. Guam³³, M. Gulino^34,35, B. R. Hackett⁴, K. Herner⁸, T. Hessel²⁷, F. Hubaut³⁶, E. V. Hungerford³⁷, A. Ianni^18,1, V. Ippolito⁹, K. Keeter³⁸, C. L. Kendziora⁸, M. Kimura³⁹, I. Kochanek¹, D. Korablev³², G. Korga^37,1, A. Kubankin⁴⁰, M. Kuss⁷, M. La Commara^16,17, M. Lai^15,10, X. Li¹⁸, M. Lissia¹⁰, O. Lychagina^32,20, I. N. Machulin^30,31, L. P. Mapelli⁴¹, S. M. Mari^13,14, J. Maricic⁴², A. Messina^24,9, R. Milincic⁴², J. Monroe⁴³, M. Morrocchi^6,7, V. N. Muratova²⁵, P. Musico¹², A. O. Nozdrina^30,31, A. Oleinik⁴⁰, F. Ortica^44,45, L. Pagani⁴⁶, M. Pallavicini^11,12, L. Pandola³⁵, E. Pantic⁴⁶, E. Paoloni^6,7, K. Pelczar^1,47, N. Pelliccia^44,45, S. Piacentini^24,9,1,2, A. Pocar²⁶, M. Poehlmann⁴⁶, S. Pordes⁸, S. S. Poudel³⁷, P. Pralavorio³⁶, D. Price⁴⁸, F. Ragusa^22,23, M. Razeti¹⁰, A. L. Renshaw³⁷, M. Rescigno⁹, J. Rode^28,27, A. Romani^44,45, D. Sablone^18,1, O. Samoylov³², S. Sanfilippo³⁵, C. Savarese¹⁸, N. Saviano^17,21, B. Schlitzer⁴⁶, D. A. Semenov²⁵, A. Sheshukov³², M. D. Skorokhvatov^30,31, O. Smirnov³², A. Sotnikov³², S. Stracka⁷, Y. Suvorov^16,17, R. Tartaglia¹, G. Testera¹², A. Tonazzo²⁷, E. V. Unzhakov²⁵, A. Vishneva³², R. B. Vogelaar¹⁹, M. Wada^39,15, H. Wang⁴¹, Y. Wang^33,49, S. Westerdale⁵⁰, M. M. Wojcik⁴⁷, X. Xiao⁴¹, C. Yang^33,49, and G. Zuzel⁴⁷ (DarkSide-50 Collaboration^*)

• ¹INFN Laboratori Nazionali del Gran Sasso, Assergi (AQ) 67100, Italy
• ²Gran Sasso Science Institute, L’Aquila 67100, Italy
• ³Instituto de Física, Universidade de São Paulo, São Paulo 05508-090, Brazil
• ⁴Pacific Northwest National Laboratory, Richland, Washington 99352, USA
• ⁵Physics Department, Augustana University, Sioux Falls, South Dakota 57197, USA
• ⁶Physics Department, Università degli Studi di Pisa, Pisa 56127, Italy
• ⁷INFN Pisa, Pisa 56127, Italy
• ⁸Fermi National Accelerator Laboratory, Batavia, Illinois 60510, USA
• ⁹INFN Sezione di Roma, Roma 00185, Italy
• ¹⁰INFN Cagliari, Cagliari 09042, Italy
• ¹¹Physics Department, Università degli Studi di Genova, Genova 16146, Italy
• ¹²INFN Genova, Genova 16146, Italy
• ¹³Department of Mathematics and Physics—Roma Tre University, Roma 00146, Italy
• ¹⁴INFN Roma Tre, Roma 00146, Italy
• ¹⁵Physics Department, Università degli Studi di Cagliari, Cagliari 09042, Italy
• ¹⁶Physics Department, Università degli Studi “Federico II” di Napoli, Napoli 80126, Italy
• ¹⁷INFN Napoli, Napoli 80126, Italy
• ¹⁸Physics Department, Princeton University, Princeton, New Jersey 08544, USA
• ¹⁹Virginia Tech, Blacksburg, Virginia 24061, USA
• ²⁰Skobeltsyn Institute of Nuclear Physics, Lomonosov Moscow State University, Moscow 119234, Russia
• ²¹Scuola Superiore Meridionale, 80138 Napoli, Italy
• ²²Physics Department, Università degli Studi di Milano, Milano 20133, Italy
• ²³INFN Milano, Milano 20133, Italy
• ²⁴Physics Department, Sapienza Università di Roma, Roma 00185, Italy
• ²⁵Saint Petersburg Nuclear Physics Institute, Gatchina 188350, Russia
• ²⁶Amherst Center for Fundamental Interactions and Physics Department, University of Massachusetts, Amherst, Massachusetts 01003, USA
• ²⁷APC, Université de Paris, CNRS, Astroparticule et Cosmologie, Paris F-75013, France
• ²⁸LPNHE, CNRS/IN2P3, Sorbonne Université, Université Paris Diderot, Paris 75252, France
• ²⁹INFN Laboratori Nazionali di Frascati, Frascati 00044, Italy
• ³⁰National Research Centre Kurchatov Institute, Moscow 123182, Russia
• ³¹National Research Nuclear University MEPhI, Moscow 115409, Russia
• ³²Joint Institute for Nuclear Research, Dubna 141980, Russia
• ³³Institute of High Energy Physics, Chinese Academy of Sciences, Beijing 100049, China
• ³⁴Engineering and Architecture Department, Università di Enna Kore, Enna 94100, Italy
• ³⁵INFN Laboratori Nazionali del Sud, Catania 95123, Italy
• ³⁶Centre de Physique des Particules de Marseille, Aix Marseille Univ, CNRS/IN2P3, CPPM, Marseille, France
• ³⁷Department of Physics, University of Houston, Houston, Texas 77204, USA
• ³⁸School of Natural Sciences, Black Hills State University, Spearfish, South Dakota 57799, USA
• ³⁹AstroCeNT, Nicolaus Copernicus Astronomical Center of the Polish Academy of Sciences, 00-614 Warsaw, Poland
• ⁴⁰Radiation Physics Laboratory, Belgorod National Research University, Belgorod 308007, Russia
• ⁴¹Physics and Astronomy Department, University of California, Los Angeles, California 90095, USA
• ⁴²Department of Physics and Astronomy, University of Hawai’i, Honolulu, Hawaii 96822, USA
• ⁴³Department of Physics, Royal Holloway University of London, Egham TW20 0EX, United Kingdom
• ⁴⁴Chemistry, Biology and Biotechnology Department, Università degli Studi di Perugia, Perugia 06123, Italy
• ⁴⁵INFN Perugia, Perugia 06123, Italy
• ⁴⁶Department of Physics, University of California, Davis, California 95616, USA
• ⁴⁷M. Smoluchowski Institute of Physics, Jagiellonian University, 30-348 Krakow, Poland
• ⁴⁸Department of Physics and Astronomy, The University of Manchester, Manchester M13 9PL, United Kingdom
• ⁴⁹University of Chinese Academy of Sciences, Beijing 100049, China
• ⁵⁰Department of Physics and Astronomy, University of California, Riverside, California 92507, USA

• ^*Contact author: ds-ed@lists.infn.it