Evidence of Antineutrinos from Distant Reactors Using Pure Water at SNO+
Physical Review Letters(2023)
Queens Univ | Lab Instrumentacao & Fis Expt Particulas LIP | Univ Calif Berkeley | Univ Alberta | Univ Penn | Laurentian Univ | Univ Sussex | Univ Oxford | Univ Chicago | Tech Univ Dresden | Kings Coll London | SNOLAB | Boston Univ | Univ Nacl Autonoma Mexico | TRIUMF | Univ Lancaster | Univ Liverpool | Queen Mary Univ London | Univ Calif Davis | Brookhaven Natl Lab | MTA Atomki
Abstract
The SNO+ Collaboration reports the first evidence of reactor antineutrinos in a Cherenkov detector. The nearest nuclear reactors are located 240 km away in Ontario, Canada. This analysis uses events with energies lower than in any previous analysis with a large water Cherenkov detector. Two analytical methods are used to distinguish reactor antineutrinos from background events in 190 days of data and yield consistent evidence for antineutrinos with a combined significance of 3.5σ.
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Key words
Neutrino Detection,Neutron Detection,Reactor Antineutrinos,Semiconductor Thermal Neutron Detectors,Scintillation Detectors
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