期刊
PHYSICAL REVIEW D
卷 99, 期 11, 页码 -出版社
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.99.112007
关键词
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资金
- Natural Sciences and Engineering Research Council
- Industry Canada
- National Research Council
- Northern Ontario Heritage Fund
- Atomic Energy of Canada, Ltd.
- Ontario Power Generation
- High Performance Computing Virtual Laboratory
- Canada Foundation for Innovation
- Canada Research Chairs program (Canada)
- Department of Energy Office of Nuclear Physics
- National Energy Research Scientific Computing Center
- Alfred P. Sloan Foundation
- National Science Foundation
- Queens Breakthrough Fund
- Department of Energy National Nuclear Security Administration through the Nuclear Science and Security Consortium (United States)
- Science and Technology Facilities Council (United Kingdom)
- Fundacao para a Ciencia e a Tecnologia (Portugal)
- STFC [ST/S000798/1, ST/N000404/1] Funding Source: UKRI
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 nu(mu) and nu(e). Results show good overall agreement between data and Monte Carlo for both phases, with some small tension with a statistical significance below 2 sigma for some intermediate energies.
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