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

MPG-Autoren
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Heusser,  Gerd
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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Schönert,  Stefan
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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Simgen,  Hardy
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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Zuzel,  Grzegorz
Division Prof. Dr. Manfred Lindner, MPI for Nuclear Physics, Max Planck Society;

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Zitation

Heusser, G., Schönert, S., Simgen, H., & Zuzel, G. (2006). Search for electron antineutrino interactions with the Borexino Counting Test Facility at Gran Sasso. The European Physical Journal C, 47, 21-30. doi:10.1140/epjc/s2006-02560-4.


Zitierlink: http://hdl.handle.net/11858/00-001M-0000-0011-8008-E
Zusammenfassung
Electron antineutrino interactions above the inverse beta decay energy of protons (E¯νe > 1.8MeV) 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 ¯νe flux, assumed having the 8B solar neutrino energy spectrum, of 1.1×105 cm−2s−1 (90% C.L.) was set with a 7.8 ton × year exposure. This upper limit corresponds to a solar neutrino transition probability, νe → ¯νe, 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.