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Determination of neutrino incoming direction in the CHOOZ experiment and Supernova explosion location by scintillator detectors

M. Apollonio·A. Baldini·C. Bemporad·E. Caffau·F. Cei·Y. Declais·H. de Kerret·B. Dieterle·A. Etenko·L. Foresti·J. George·G. Giannini·M. Grassi·Y. Kozlov·W. Kropp·D. Kryn·M. Laiman·C. E. Lane·B. Lefievre·I. Machulin·A. Martemyanov·V. Martemyanov·L. Mikaelyan·D. Nicolo·M. Obolensky·R. Pazzi·G. Pieri·L. Price·S. Riley·R. Reeder·A. Sabelnikov·G. Santin·M. Skorokhvatov·H. Sobel·J. Steele·R. Steinberg·S. Sukhotin·S. Tomshaw·D. Veron·V. Vyrodov
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Abstract

The CHOOZ experiment measured the antineutrino flux at a distance of about 1 Km from two nuclear reactors in order to detect possible neutrino oscillations with squared mass differences as low as 10**-3 eV**2 for full mixing. We show that the data analysis of the electron antineutrino events, collected by our liquid scintillation detector, locates the antineutrino source within a cone of half-aperture of about 18 degrees at the 68% C.L.. We discuss the implications of this experimental result for tracking down a supernova explosion.

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M. Apollonio, A. Baldini, C. Bemporad, E. Caffau, F. Cei, Y. Declais, H. de Kerret, B. Dieterle, A. Etenko, L. Foresti, J. George, G. Giannini, M. Grassi, Y. Kozlov, W. Kropp, D. Kryn, M. Laiman, C. E. Lane, B. Lefievre, I. Machulin, A. Martemyanov, V. Martemyanov, L. Mikaelyan, D. Nicolo, M. Obolensky, R. Pazzi, G. Pieri, L. Price, S. Riley, R. Reeder, A. Sabelnikov, G. Santin, M. Skorokhvatov, H. Sobel, J. Steele, R. Steinberg, S. Sukhotin, S. Tomshaw, D. Veron, V. Vyrodov. 1999-06-07. Determination of neutrino incoming direction in the CHOOZ experiment and Supernova explosion location by scintillator detectors. https://doi.org/10.1103/physrevd.61.012001

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