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Aharmim, B.; Anthony, A. E.; Beier, E. W.; Bellerive, A.; Beltran, B.; Bergevin, M.; Biller, S. D.; Boudjemline, K.; Boulay, M. G.; Cai, B.; Callaghan, E. J.; Chan, Y. D.; Chen, M.; Dai, X.; Deng, H.; Descamps, F. B.; Detwiler, J. A.; Doe, P. J.; Doucas, G.; Elliott, S. R.; Evans, H. C.; Farine, J.; Fergani, H.; Fleurot, F.; Ford, R. J.; Gagnon, N.; Gilje, K.; Goon, J. TM; Graham, K.; Guillian, E.; Habib, S.; Hahn, R. L.; Hallin, A. L.; Harvey, P. J.; Heise, J.; Helmer, R. L.; Hime, A.; Howard, C.; Huang, M.; Jagam, P.; Jamieson, B.; Jerkins, M.; Keeter, K. J.; Klein, J. R.; Kormos, L. L.; Kos, M.; Krüger, A.; Kraus, C.; Krauss, C. B.; Kyba, C. C. M.; Lange, R.; Lawson, I. T.; Lesko, K. T.; Leslie, J. R.; Loach, J. C.; MacLellan, R.; Majerus, S.; Mak, H. B.; Maneira, J.; Martin, R. D.; Mastbaum, A.; McCauley, N.; McDonald, A. B.; McGee, S. R.; Miller, M. L.; Monreal, B.; Nickel, B. G.; Noble, A. J.; O’Keeffe, H. M.; Oblath, N. S.; Okada, C. E.; Orebi Gann, G. D.; Oser, S. M.; Ott, R. A.; Peeters, S. J. M.; Poon, A. W. P.; Robertson, B. C.; Robertson, R. G. H.; Secrest, J. A.; Seibert, S. R.; Simard, O.; Sinclair, D.; Singh, J.; Skensved, P.; Stonehill, L. C.; Tešić, G.; Tolich, N.; Tsui, T.; Van Berg, R.; VanDevender, B. A.; Wall, B. L.; Waller, D.; Wan Chan Tseung, H.; Wendland, J.; West, N.; Wilkerson, J. F.; Wilson, J. R.; Yeh, M.; Zhang, F.; Zuber, K.
Physical review. D, 06/2019, Letnik: 99, Številka: 11Journal Article
Neutron production in giga electron volt–scale neutrino interactions is a poorly studied process. We have measured the neutron multiplicities in atmospheric neutrino interactions in the Sudbury Neutrino Observatory experiment and compared them to the prediction of a Monte Carlo simulation using genie and a minimally modified version of geant4. We analyzed 837 days of exposure corresponding to Phase I, using pure heavy water, and Phase II, using a mixture of Cl in heavy water. Neutrons produced in atmospheric neutrino interactions were identified with an efficiency of 15.3% and 44.3%, for Phases I and II respectively. The neutron production is measured as a function of the visible energy of the neutrino interaction and, for charged current quasielastic interaction candidates, also as a function of the neutrino energy. This study is also performed by classifying the complete sample into two pairs of event categories: charged current quasielastic and non charged current quasielastic, and νμ and νe. Results show good overall agreement between data and Monte Carlo for both phases, with some small tension with a statistical significance below 2σ for some intermediate energies.
