학술논문
Search for invisible modes of nucleon decay in water with the SNO+ detector
Document Type
article
Author
Anderson, M; Andringa, S; Arushanova, E; Asahi, S; Askins, M; Auty, DJ; Back, AR; Barnard, Z; Barros, N; Bartlett, D; Barão, F; Bayes, R; Beier, EW; Bialek, A; Biller, SD; Blucher, E; Bonventre, R; Boulay, M; Braid, D; Caden, E; Callaghan, EJ; Caravaca, J; Carvalho, J; Cavalli, L; Chauhan, D; Chen, M; Chkvorets, O; Clark, KJ; Cleveland, B; Connors, C; Coulter, IT; Cressy, D; Dai, X; Darrach, C; Davis-Purcell, B; Depatie, MM; Descamps, F; Di Lodovico, F; Duhaime, N; Duncan, F; Dunger, J; Falk, E; Fatemighomi, N; Fischer, V; Fletcher, E; Ford, R; Gagnon, N; Gilje, K; Gorel, P; Graham, K; Grant, C; Grove, J; Grullon, S; Guillian, E; Hallin, AL; Hallman, D; Hans, S; Hartnell, J; Harvey, P; Hedayatipour, M; Heintzelman, WJ; Heise, J; Helmer, RL; Hernández-Hernández, JL; Hreljac, B; Hu, J; Iida, T; Inácio, AS; Jackson, CM; Jelley, NA; Jillings, CJ; Jones, C; Jones, PG; Kamdin, K; Kaptanoglu, T; Kaspar, J; Keeter, K; Kefelian, C; Khaghani, P; Kippenbrock, L; Klein, JR; Knapik, R; Kofron, J; Kormos, LL; Krar, B; Kraus, C; Krauss, CB; Kroupova, T; Labe, K; Lam, I; Lan, C; Land, BJ; Lane, R; Langrock, S; LaTorre, A; Lawson, I; Lebanowski, L; Lefeuvre, GM; Leming, EJ; Li, A
Source
Physical Review D. 99(3)
Subject
Language
Abstract
This paper reports results from a search for nucleon decay through invisible modes, where no visible energy is directly deposited during the decay itself, during the initial water phase of SNO+. However, such decays within the oxygen nucleus would produce an excited daughter that would subsequently deexcite, often emitting detectable gamma rays. A search for such gamma rays yields limits of 2.5×1029 y at 90% Bayesian credibility level (with a prior uniform in rate) for the partial lifetime of the neutron, and 3.6×1029 y for the partial lifetime of the proton, the latter a 70% improvement on the previous limit from SNO. We also present partial lifetime limits for invisible dinucleon modes of 1.3×1028 y for nn, 2.6×1028 y for pn and 4.7×1028 y for pp, an improvement over existing limits by close to 3 orders of magnitude for the latter two.