Experimental evidence of electron neutrino oscillations and validation of MSW-LMA model with Borexino

被引：0
作者：
Avanzini, M. Buizza [1 ,2 ]
机构：
[1] Dipartimento Fis, Milan, Italy
[2] Ist Nazl Fis Nucl, Sez Milano, Milan, Italy
来源：
PROGRESS IN PARTICLE AND NUCLEAR PHYSICS | 2011年 / 66卷 / 02期
关键词：
Solar neutrino; Oscillation; MSW-LMA; Day-night asymmetry;
D O I：
10.1016/j.ppnp.2011.01.043
中图分类号：
O57 [原子核物理学、高能物理学];
学科分类号：
070202 ;
摘要：
We report the real time measurements of Be-7 and B-8 solar neutrino fluxes performed with the Borexino experiment at the Laboratori Nazionali del Gran Sasso. The achievement of these measurements was possible thanks to the excellent levels of the radiopurity reached. The measurement of the Be-7 in real time is the first direct measurements of the survival probability for solar electron neutrinos in the vacuum region. For B-8 we reached a threshold energy of 3MeV which is the lowest achieved so far in real time. For the first time, the same apparatus can measure two different oscillation regions (vacuum-driven and matter-enhanced) predicted by the MSW-LMA model. Borexino also quotes the ratio between the survival probabilities, corresponding to 1.93 +/- 0.75, and validates the presence of the transition region between the two oscillation regimes, according to the MSW-LMA solution. In addition, a preliminary result on the Day-Night Asymmetry (ADN) for the Be-7 neutrino flux is presented and corresponds to 0.007 +/- 0.073. This measurement makes Borexino able to give once more an independent confirmation of the MSW-LMA solution. (C) 2011 Elsevier B.V. All rights reserved.
引用
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页码：412 / 417
页数：6
相关论文
共 8 条
  • [1] Production of radioactive isotopes through cosmic muon spallation in KamLAND
    Abe, S.
    Enomoto, S.
    Furuno, K.
    Gando, Y.
    Ikeda, H.
    Inoue, K.
    Kibe, Y.
    Kishimoto, Y.
    Koga, M.
    Minekawa, Y.
    Mitsui, T.
    Nakajima, K.
    Nakajima, K.
    Nakamura, K.
    Nakamura, M.
    Shimizu, I.
    Shimizu, Y.
    Shirai, J.
    Suekane, F.
    Suzuki, A.
    Takemoto, Y.
    Tamae, K.
    Terashima, A.
    Watanabe, H.
    Yonezawa, E.
    Yoshida, S.
    Kozlov, A.
    Murayama, H.
    Busenitz, J.
    Classen, T.
    Grant, C.
    Keefer, G.
    Leonard, D. S.
    McKee, D.
    Piepke, A.
    Banks, T. I.
    Bloxham, T.
    Detwiler, J. A.
    Freedman, S. J.
    Fujikawa, B. K.
    Gray, F.
    Guardincerri, E.
    Hsu, L.
    Ichimura, K.
    Kadel, R.
    Lendvai, C.
    Luk, K. -B.
    O'Donnell, T.
    Steiner, H. M.
    Winslow, L. A.
    [J]. PHYSICAL REVIEW C, 2010, 81 (02):
  • [2] AHARMIM B, ARXIV09102984V2NUCLE, P24318
  • [3] The liquid handling systems for the Borexino solar neutrino detector
    Alimonti, G.
    Arpesella, C.
    Avanzini, M. B.
    Back, H.
    Balata, M.
    Bartolomei, D.
    de Bellefon, A.
    Bellini, G.
    Benziger, J.
    Bevilacqua, A.
    Bondi, D.
    Bonetti, S.
    Brigatti, A.
    Caccianiga, B.
    Cadonati, L.
    Calaprice, F.
    Carraro, C.
    Cecchet, G.
    Cereseto, R.
    Chavarria, A.
    Chen, M.
    Chepurnov, A.
    Cubaiu, A.
    Czech, W.
    D'Angelo, D.
    Dalnoki-Veress, F.
    Davini, S.
    De Bari, A.
    De Haas, E.
    Derbin, A.
    Deutsch, M.
    Di Credico, A.
    Di Ludovico, A.
    Di Pietro, G.
    Eisenstein, R.
    Elisei, F.
    Etenko, A.
    von Feilitzsch, F.
    Fernholz, R.
    Fomenko, K.
    Ford, R.
    Franco, D.
    Freudiger, B.
    Gaertner, N.
    Galbiati, C.
    Gatti, F.
    Gazzana, S.
    Gehman, V.
    Giammarchi, M.
    Giugni, D.
    [J]. NUCLEAR INSTRUMENTS & METHODS IN PHYSICS RESEARCH SECTION A-ACCELERATORS SPECTROMETERS DETECTORS AND ASSOCIATED EQUIPMENT, 2009, 609 (01) : 58 - 78
  • [4] Direct measurement of the 7Be solar neutrino flux with 192 days of Borexino data
    Arpesella, C.
    Back, H. O.
    Balata, M.
    Bellini, G.
    Benziger, J.
    Bonetti, S.
    Brigatti, A.
    Caccianiga, B.
    Cadonati, L.
    Calaprice, F.
    Carraro, C.
    Cecchet, G.
    Chavarria, A.
    Chen, M.
    Dalnoki-Veress, F.
    D'Angelo, D.
    de Bari, A.
    de Bellefon, A.
    de Kerret, H.
    Derbin, A.
    Deutsch, M.
    di Credico, A.
    di Pietro, G.
    Eisenstein, R.
    Elisei, E.
    Etenko, A.
    Fernholz, R.
    Fomenko, K.
    Ford, R.
    Franco, D.
    Freudiger, B.
    Galbiati, C.
    Gatti, F.
    Gazzana, S.
    Giammarchi, M.
    Giugni, D.
    Goeger-Neff, M.
    Goldbrunner, T.
    Goretti, A.
    Grieb, C.
    Hagner, C.
    Hampel, W.
    Harding, E.
    Hardy, S.
    Hartman, F. X.
    Hertrich, T.
    Heusser, G.
    Ianni, Aldo
    Ianni, Andrea
    Joyce, M.
    [J]. PHYSICAL REVIEW LETTERS, 2008, 101 (09)
  • [5] Measurement of the solar 8B neutrino rate with a liquid scintillator target and 3 MeV energy threshold in the Borexino detector
    Bellini, G.
    Benziger, J.
    Bonetti, S.
    Avanzini, M. Buizza
    Caccianiga, B.
    Cadonati, L.
    Calaprice, F.
    Carraro, C.
    Chavarria, A.
    Chepurnov, A.
    Dalnoki-Veress, F.
    D'Angelo, D.
    Davini, S.
    de Kerret, H.
    Derbin, A.
    Etenko, A.
    Fomenko, K.
    Franco, D.
    Galbiati, C.
    Gazzana, S.
    Ghiano, C.
    Giammarchi, M.
    Goeger-Neff, M.
    Goretti, A.
    Guardincerri, E.
    Hardy, S.
    Ianni, Aldo
    Ianni, Andrea
    Joyce, M.
    Korga, G.
    Kryn, D.
    Laubenstein, M.
    Leung, M.
    Lewke, T.
    Litvinovich, E.
    Loer, B.
    Lombardi, P.
    Ludhova, L.
    Machulin, I.
    Manecki, S.
    Maneschg, W.
    Manuzio, G.
    Meindl, Q.
    Meroni, E.
    Miramonti, L.
    Misiaszek, M.
    Montanari, D.
    Muratova, V.
    Oberauer, L.
    Obolensky, M.
    [J]. PHYSICAL REVIEW D, 2010, 82 (03):
  • [6] DEHOLANDA PC, 2008, ARXIV08110567V1HEPPH, P24318
  • [7] FOGLI GL, 2008, ARXIV08062649, P24318
  • [8] SERENELLI A, 2009, ARXIV09103690, P24318
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