Measurement of neutron production in atmospheric neutrino interactions at the Sudbury Neutrino Observatory
Physical Review D American Physical Society 99:11 (2019) 112007
Abstract:
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.In-situ characterization of the Hamamatsu R5912-HQE photomultiplier tubes used in the DEAP-3600 experiment
Nuclear Instruments and Methods in Physics Research Section A Accelerators Spectrometers Detectors and Associated Equipment Elsevier 922 (2019) 373-384
Design and construction of the DEAP-3600 dark matter detector
Astroparticle Physics Elsevier 108 (2019) 1-23
Constraints on neutrino lifetime from the Sudbury Neutrino Observatory
Physical Review D American Physical Society (APS) 99:3 (2019) 032013
Tests of Lorentz invariance at the Sudbury Neutrino Observatory
Physical Review D American Physical Society (APS) 98:11 (2018) 112013