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arxiv: 2210.14154 · v3 · pith:X3FINURHnew · submitted 2022-10-25 · ⚛️ nucl-ex · hep-ex

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

classification ⚛️ nucl-ex hep-ex
keywords antineutrinosevidenceanalysischerenkovdetectoreventsreactorreactors
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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 3.5$\sigma$.

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