STUDY OF SOLAR AND GEO-NEUTRINOS WITH THE BOREXINO DETECTOR

STUDY OF SOLAR AND GEO-NEUTRINOS WITH THE BOREXINO DETECTOR

Evgeny 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,Davide Franco,C. Galbiati,S. Gazzana,C. Ghiano,M. Giammarchi,M. Göger-Neff,A. Goretti,L. Grandi,E. Guardincerri,S. Hardy,Al. Ianni,An. 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,Gioacchino Ranucci,A. Razeto,A. Re,A. Romani,A. Sabelnikov,Richard Saldanha,C. Salvo,Stefan Schönert,H. Simgen,M. Skorokhvatov,O. Smirnov,Albert 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,on behalf of the Borexino collaboration;Evgeny 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;Davide Franco;C. Galbiati;S. Gazzana;C. Ghiano;M. Giammarchi;M. Göger-Neff;A. Goretti;L. Grandi;E. Guardincerri;S. Hardy;Al. Ianni;An. 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;Gioacchino Ranucci;A. Razeto;A. Re;A. Romani;A. Sabelnikov;Richard Saldanha;C. Salvo;Stefan Schönert;H. Simgen;M. Skorokhvatov;O. Smirnov;Albert 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;on behalf of the Borexino collaboration;
Particle Physics at the Tercentenary of Mikhail Lomonosov 2013 pp. 173-176
273
collaboration2013particlestudy

Abstract

Recent Borexino measurement of the 0.862 MeV 7Be solar neutrino interaction rate yielded count/ (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 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.

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