Evidence of Antineutrinos from Distant Reactors Using Pure Water at SNO+

UNSPECIFIED (2023) Evidence of Antineutrinos from Distant Reactors Using Pure Water at SNO+. Physical review letters, 130 (9): 091801. ISSN 0031-9007

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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.