Recent Borexino measurement of the 0.862 MeV 7Be solar neutrino interaction rate yielded 46.0±1.5stat-1.5syst+1.6 counts/ (day · 100 tons). This is the first direct measurement of a sub-MeV solar neutrino rate with an accuracy better than 5%. Using the latest Standard Solar Model (SSM) flux predictions, the result permits to probe with unprecedented sensitivity the transition between the matter-enhanced and vacuum-dominated neutrino oscillation regimes characteristic of the MSW-LMA solution to the solar neutrino problem. Geo-neutrinos are a unique direct probe of Earth's interior. Recently Borexino has reported the first observation at more than 3σ C.L. of geo-neutrinos. Borexino measurement of the geo-neutrinos rate is 3.9+1.6-1.3(+5.8-3.2) events/(yr · 100 tons) with errors corresponding to a 68.3% (99.73%) C.L. Hypothesis of an active geo-reactor in the Earth's core with a power above 3 TW is rejected at 95% C.L. © 2013 by World Scientific Publishing Co. Pte. Ltd.
Study of solar and geo-neutrinos with the Borexino detector / E. Litvinovich, G. Bellini, J. Benziger, D. Bick, S. Bonetti, M. Buizza Avanzini, B. Caccianiga, L. Cadonati, F. Calaprice, C. Carraro, P. Cavalcante, A. Chavarria, D. Dangelo, S. Davini, A. Derbin, A. Etenko, F. Von Feilitzsch, K. Fomenko, D. Franco, C. Galbiati, S. Gazzana, C. Ghiano, M. Giammarchi, M. Goger-Neff, A. Goretti, L. Grandi, E. Guardincerri, S. Hardy, A. Ianni, A. Ianni, V. Kobychev, D. Korablev, G. Korga, Y. Koshio, D. Kryn, T. Lewke, E. Litvinovich, B. Loer, P. Lombardi, I. Machulin, S. Manecki, W. Maneschg, G. Manuzio, Q. Meindl, E. Meroni, L. Miramonti, M. Misiaszek, D. Montanari, P. Mosteiro, V. Muratova, L. Oberauer, M. Obolensky, F. Ortica, M. Pallavicini, L. Papp, L. Perasso, S. Perasso, A. Pocar, R.S. Raghavan, G. Ranucci, A. Razeto, A. Re, A. Romani, A. Sabelnikov, R. Saldanha, C. Salvo, S. Schonert, H. Simgen, M. Skorokhvatov, O. Smirnov, A. Sotnikov, S. Sukhotin, Y. Suvorov, R. Tartaglia, G. Testera, D. Vignaud, R.B. Vogelaar, J. Winter, M. Wojcik, A. Wright, M. Wurm, J. Xu, O. Zaimidoroga, S. Zavatarelli, G. Zuzel. - (2013), pp. 173-176. (Intervento presentato al 15. convegno 15th Lomonosov Conference on Elementary Particle Physics 2011 tenutosi a Moscow, rus nel 2011) [10.1142/9789814436830_0037].
Study of solar and geo-neutrinos with the Borexino detector
M. Buizza Avanzini;B. Caccianiga;C. Carraro;A. Chavarria;S. Davini;M. Giammarchi;L. Miramonti;M. Pallavicini;L. Papp;S. Perasso;Y. Suvorov;R. Tartaglia;M. Wurm;S. Zavatarelli;
2013
Abstract
Recent Borexino measurement of the 0.862 MeV 7Be solar neutrino interaction rate yielded 46.0±1.5stat-1.5syst+1.6 counts/ (day · 100 tons). This is the first direct measurement of a sub-MeV solar neutrino rate with an accuracy better than 5%. Using the latest Standard Solar Model (SSM) flux predictions, the result permits to probe with unprecedented sensitivity the transition between the matter-enhanced and vacuum-dominated neutrino oscillation regimes characteristic of the MSW-LMA solution to the solar neutrino problem. Geo-neutrinos are a unique direct probe of Earth's interior. Recently Borexino has reported the first observation at more than 3σ C.L. of geo-neutrinos. Borexino measurement of the geo-neutrinos rate is 3.9+1.6-1.3(+5.8-3.2) events/(yr · 100 tons) with errors corresponding to a 68.3% (99.73%) C.L. Hypothesis of an active geo-reactor in the Earth's core with a power above 3 TW is rejected at 95% C.L. © 2013 by World Scientific Publishing Co. Pte. Ltd.
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