Experimental evidence of neutrinos produced in the CNO fusion cycle in the Sun.

  title={Experimental evidence of neutrinos produced in the CNO fusion cycle in the Sun.},
  author={Matteo Agostini and Konrad Altenmuller and Sabrina Appel and Victor Atroshchenko and Zara Bagdasarian and Davide Basilico and Gianpaolo Bellini and Jay B. Benziger and Riccardo Biondi and David Bravo and Barbara Caccianiga and Frank P. Calaprice and Alessio Caminata and Paolo Cavalcante and Alexander Chepurnov and D. D’Angelo and Stefano Davini and Alexander Derbin and A. Di Giacinto and Valentino Di Marcello and X. F. Ding and A. Di Ludovico and Lea Di Noto and I. S. Drachnev and Andrey Formozov and D. Franco and Cristiano Galbiati and Chiara Ghiano and Marco Giammarchi and Augusto Goretti and Alexandre Gottel and Maxim Gromov and Daniele Guffanti and Al. Ianni and Andrea Ianni and Anna Jany and Dominik Jeschke and V. V. Kobychev and George Korga and Sindhujha Kumaran and Matthias Laubenstein and Evgeny Litvinovich and Paolo Lombardi and I. S. Lomskaya and Livia Ludhova and Georgy Lukyanchenko and Liudmila Lukyanchenko and I. N. Machulin and John M. Martyn and E. Meroni and Michael Meyer and Lino Miramonti and M. Misiaszek and Viktorina N. Muratova and Birgit Neumair and Michael Nieslony and Ramil I. Nugmanov and Lothar Oberauer and Vsevolod Orekhov and Fausto Ortica and Marco Pallavicini and L{\'a}szl{\'o} Papp and L. Pellicci and Omer Penek and Lidio Pietrofaccia and Nelly Pilipenko and Andrea Pocar and Georgy Raikov and Maria Teresa Ranalli and G. Ranucci and Alessandro Razeto and Alessandra Carlotta Re and Mariia Redchuk and A. Romani and Nicola Rossi and Stefan Schonert and Dmitrii Semenov and Giulio Settanta and Mikhail Skorokhvatov and Akshat Singhal and O. Yu. Smirnov and Albert Sotnikov and Yura Suvorov and Roberto Tartaglia and Gemma Testera and John D. Thurn and Evgenii Unzhakov and F. L. Villante and Alina Vishneva and Robert Bruce Vogelaar and F. v. Feilitzsch and Mariusz W{\'o}jcik and Mirjana Wurm and S Zavatarelli and Kai Zuber and Gerda collaboration},
  volume={587 7835},
For most of their existence, stars are fuelled by the fusion of hydrogen into helium. Fusion proceeds via two processes that are well understood theoretically: the proton-proton (pp) chain and the carbon-nitrogen-oxygen (CNO) cycle1,2. Neutrinos that are emitted along such fusion processes in the solar core are the only direct probe of the deep interior of the Sun. A complete spectroscopic study of neutrinos from the pp chain, which produces about 99 per cent of the solar energy, has been… 
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