Measurement of neutrino flux from the primary proton--proton fusion process in the Sun with Borexino detector

O. Y. Smirnov , M. Agostini , S. Appel , G. Bellini , J. Benziger , D. Bick , G. Bonfini , D. Bravo

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B. Caccianiga F. Calaprice A. Caminata P. Cavalcante A. Chepurnov K. Choi D. D'Angelo S. Davini A. Derbin L. Di Noto I. Drachnev A. Empl A. Etenko K. Fomenko D. Franco F. Gabriele C. Galbiati C. Ghiano M. Giammarchi M. Goeger-Neff A. Goretti M. Gromov C. Hagner E. Hungerford Aldo Ianni Andrea Ianni K. Jedrzejczak M. Kaiser V. Kobychev D. Korablev G. Korga D. Kryn M. Laubenstein B. Lehnert E. Litvinovich F. Lombardi P. Lombardi L. Ludhova G. Lukyanchenko I. Machulin S. Manecki W. Maneschg S. Marcocci E. Meroni M. Meyer L. Miramonti M. Misiaszek P. Mosteiro V. Muratova B. Neumair L. Oberauer M. Obolensky F. Ortica K. Otis L. Pagani M. Pallavicini L. Papp L. Perasso A. Pocar G. Ranucci A. Razeto A. Re A. Romani R. Roncin N. Rossi S. Sch\"onert D. Semenov H. Simgen M. Skorokhvatov A. Sotnikov S. Sukhotin Y. Suvorov R. Tartaglia G. Testera J. Thurn M. Toropova E. Unzhakov R. B. Vogelaar F. von Feilitzsch H. Wang S. Weinz J. Winter M. Wojcik M. Wurm Z. Yokley O. Zaimidoroga S. Zavatarelli K. Zuber G. Zuzel

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classification ✦ hep-ex nucl-exphysics.ins-det

keywords detectorneutrinoborexinoenergyfluxfusionproductiontime

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Neutrino produced in a chain of nuclear reactions in the Sun starting from the fusion of two protons, for the first time has been detected in a real-time detector in spectrometric mode. The unique properties of the Borexino detector provided an oppurtunity to disentangle pp-neutrino spectrum from the background components. A comparison of the total neutrino flux from the Sun with Solar luminosity in photons provides a test of the stability of the Sun on the 10$^{5}$ years time scale, and sets a strong limit on the power production in the unknown energy sources in the Sun of no more than 4\% of the total energy production at 90\% C.L.

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Measurement of neutrino flux from the primary proton--proton fusion process in the Sun with Borexino detector

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