Neutrinos from the primary proton–proton fusion process in the Sun

6533b7dcfe1ef96bd12721c7

RESEARCH PRODUCT

Neutrinos from the primary proton–proton fusion process in the Sun

E. Litvinovich E. Litvinovich N. Rossi F. Mantovani S. Perasso S. V. Sukhotin G. Korga B. Caccianiga A. Wright O. Zaimidoroga V. V. Kobychev Matthias Laubenstein I. N. Machulin I. N. Machulin Marco Pallavicini D. D'angelo M. D. Skorokhvatov M. D. Skorokhvatov Michael Wurm G. Bonfini M. Buizza Avanzini Frank Calaprice Paolo Lombardi T. Lewke E. Meroni Jay Burton Benziger Q. Meindl Hardy Simgen S. Gazzana P. Cavalcante S. Nisi Denis Korablev D. Kryn Aldo Ianni P. J. Mosteiro M. Misiaszek R. Tartaglia E. Guardincerri A. Pocar S. Davini L. Grandi G. Bellini S. Hardy V. Chubakov Lothar Oberauer M. Obolensky W. Maneschg S. Manecki O. Smirnov G. Testera K. Otis Jingke Xu Cristiano Galbiati Marcello Lissia J. Winter R. Saldanha Y. Suvorov Y. Suvorov C. Ghiano Livia Ludhova Lino Miramonti A. M. Goretti A. S. Chepurnov Marcin Wójcik D. Franco R. B. Vogelaar Alessandra Re Marco Giammarchi Andrea Ianni D. Bick Sandra Zavatarelli S. Schönert A. A. Sabelnikov A. A. Sabelnikov G. Xhixha A. V. Derbin D. Montanari B. Loer Gioacchino Ranucci Aldo Romani V. N. Muratova M. Göger-neff A. E. Chavarria L. Perasso A.v. Etenko A.v. Etenko D. Bravo C. Salvo F. Von Feilitzsch Laura Cadonati L. Papp L. Papp Fausto Ortica K. Fomenko G. Manuzio F. Lombardi A. Razeto Yusuke Koshio G. Zuzel A. Sotnikov C. Carraro

subject

Physics Particle physics Multidisciplinary Proton Solar neutrino Astrophysics::High Energy Astrophysical Phenomena Nuclear Theory Solar neutrino problem Nuclear physics Neutrino detector Physics::Space Physics Astrophysics::Solar and Stellar Astrophysics Measurements of neutrino speed Astrophysics::Earth and Planetary Astrophysics Neutrino astronomy Neutrino [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]Nuclear Experiment Borexino

description

International audience; In the core of the Sun, energy is released through sequences of nuclear reactions that convert hydrogen into helium. The primary reaction is thought to be the fusion of two protons with the emission of a low-energy neutrino. These so-called pp neutrinos constitute nearly the entirety of the solar neutrino flux, vastly outnumbering those emitted in the reactions that follow. Although solar neutrinos from secondary processes have been observed, proving the nuclear origin of the Sun's energy and contributing to the discovery of neutrino oscillations, those from proton-proton fusion have hitherto eluded direct detection. Here we report spectral observations of pp neutrinos, demonstrating that about 99 per cent of the power of the Sun, 3.84 × 1033 ergs per second, is generated by the proton-proton fusion process.

year	journal	country	edition	language
2014-01-01

10.1038/nature13702 https://hdl.handle.net/11858/00-001M-0000-0024-E602-C