Search for electron antineutrino interactions with the Borexino Counting Test Facility at Gran Sasso

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The European Physical Journal C - Particles and Fields | 2006年 / 47卷
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Solar Neutrino; Liquid Scintillator; Candidate Event; Coincidence Time; Electron Antineutrino;
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摘要：
Electron antineutrino interactions above the inverse beta decay energy of protons (Eν̄e>1.8 MeV) were looked for with the Borexino counting test facility (CTF). One candidate event survived after rejection of background, which included muon-induced neutrons and random coincidences. An upper limit on the solar ν̄e flux, assumed having the 8B solar neutrino energy spectrum, of 1.1×105 cm-2 s-1 (90% C.L.) was set with a 7.8 ton × year exposure. This upper limit corresponds to a solar neutrino transition probability, νe→ν̄e, of 0.02 (90% C.L.). Predictions for antineutrino detection with Borexino, including geoneutrinos, are discussed on the basis of background measurements performed with the CTF.
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页码：21 / 30
页数：9
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