학술논문
Current Status and Future Prospects of the SNO+ Experiment
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article
Author
Andringa, S; Arushanova, E; Asahi, S; Askins, M; Auty, DJ; Back, AR; Barnard, Z; Barros, N; Beier, EW; Bialek, A; Biller, SD; Blucher, E; Bonventre, R; Braid, D; Caden, E; Callaghan, E; Caravaca, J; Carvalho, J; Cavalli, L; Chauhan, D; Chen, M; Chkvorets, O; Clark, K; Cleveland, B; Coulter, IT; Cressy, D; Dai, X; Darrach, C; Davis-Purcell, B; Deen, R; Depatie, MM; Descamps, F; Di Lodovico, F; Duhaime, N; Duncan, F; Dunger, J; Falk, E; Fatemighomi, N; Ford, R; Gorel, P; Grant, C; Grullon, S; Guillian, E; Hallin, AL; Hallman, D; Hans, S; Hartnell, J; Harvey, P; Hedayatipour, M; Heintzelman, WJ; Helmer, RL; Hreljac, B; Hu, J; Iida, T; Jackson, CM; Jelley, NA; Jillings, C; Jones, C; Jones, PG; Kamdin, K; Kaptanoglu, T; Kaspar, J; Keener, P; Khaghani, P; Kippenbrock, L; Klein, JR; Knapik, R; Kofron, JN; Kormos, LL; Korte, S; Kraus, C; Krauss, CB; Labe, K; Lam, I; Lan, C; Land, BJ; Langrock, S; LaTorre, A; Lawson, I; Lefeuvre, GM; Leming, EJ; Lidgard, J; Liu, X; Liu, Y; Lozza, V; Maguire, S; Maio, A; Majumdar, K; Manecki, S; Maneira, J; Marzec, E; Mastbaum, A; McCauley, N; McDonald, AB; McMillan, JE; Mekarski, P; Miller, C; Mohan, Y; Mony, E; Mottram, MJ
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Abstract
SNO+ is a large liquid scintillator-based experiment located 2 km underground at SNOLAB, Sudbury, Canada. It reuses the Sudbury Neutrino Observatory detector, consisting of a 12 m diameter acrylic vessel which will be filled with about 780 tonnes of ultra-pure liquid scintillator. Designed as a multipurpose neutrino experiment, the primary goal of SNO+ is a search for the neutrinoless double-beta decay (0ββ) of 130Te. In Phase I, the detector will be loaded with 0.3% natural tellurium, corresponding to nearly 800 kg of 130Te, with an expected effective Majorana neutrino mass sensitivity in the region of 55-133 meV, just above the inverted mass hierarchy. Recently, the possibility of deploying up to ten times more natural tellurium has been investigated, which would enable SNO+ to achieve sensitivity deep into the parameter space for the inverted neutrino mass hierarchy in the future. Additionally, SNO+ aims to measure reactor antineutrino oscillations, low energy solar neutrinos, and geoneutrinos, to be sensitive to supernova neutrinos, and to search for exotic physics. A first phase with the detector filled with water will begin soon, with the scintillator phase expected to start after a few months of water data taking. The 0νββ Phase I is foreseen for 2017.