This Letter reports a direct measurement of the 7Be solar neutrino signal rate performed with the Borexino low background liquid scintillator detector at the Laboratori Nazionali del Gran Sasso. This is the first real-time spectral measurement of sub-MeV solar neutrinos. The result for 0.862 MeV 7Be neutrinos is 47±7stat±12sys counts/(day dot operator 100 ton), consistent with predictions of Standard Solar Models and neutrino oscillations with LMA-MSW parameters.
First real time detection of 7Be solar neutrinos by Borexino / C. Arpesella, G. Bellini, J. Benziger, S. Bonetti, B. Caccianiga, F. Calaprice, F. Dalnoki Veress, D. D'Angelo, H. de Kerret, A. Derbin, M. Deutsch, A. Etenko, K. Fomenko, R. Ford, D. Franco, B. Freudiger, C. Galbiati, S. Gazzana, M. Giammarchi, M. Goeger Neff, A. Goretti, C. Grieb, S. Hardy, G. Heusser, A. Ianni, A. Ianni, M. Joyce, G. Korga, D. Kryn, M. Laubenstein, M. Leung, E. Litvinovich, P. Lombardi, L. Ludhova, I. Machulin, G. Manuzio, A. Martemianov, F. Masetti, K. Mccarty, E. Meroni, L. Miramonti, M. Misiaszek, D. Montanari, M.E. Monzani, V. Muratova, L. Niedermeier, L. Oberauer, M. Obolensky, F. Ortica, M. Pallavicini, L. Papp, L. Perasso, A. Pocar, R.S. Raghavan, G. Ranucci, A. Razeto, A. Sabelnikov, C. Salvo, S. Schönert, H. Simgen, O. Smirnov, M. Skorokhvatov, A. Sonnenschein, A. Sotnikov, S. Sukhotin, Y. Suvorov, V. Tarasenkov, R. Tartaglia, G. Testera, D. Vignaud, S. Vitale, R.B. Vogelaar, F. von Feilitzsch, M. Wojcik, O. Zaimidoroga, S. Zavatarelli, G. Zuzel. - In: PHYSICS LETTERS. SECTION B. - ISSN 0370-2693. - 658:4(2008 Jan), pp. 101-108. [10.1016/j.physletb.2007.09.054]
First real time detection of 7Be solar neutrinos by Borexino
G. Bellini;S. Bonetti;B. Caccianiga;D. D'Angelo;D. Franco;E. Meroni;L. Miramonti;
2008
Abstract
This Letter reports a direct measurement of the 7Be solar neutrino signal rate performed with the Borexino low background liquid scintillator detector at the Laboratori Nazionali del Gran Sasso. This is the first real-time spectral measurement of sub-MeV solar neutrinos. The result for 0.862 MeV 7Be neutrinos is 47±7stat±12sys counts/(day dot operator 100 ton), consistent with predictions of Standard Solar Models and neutrino oscillations with LMA-MSW parameters.
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