Recent results from Borexino on solar neutrinos

¹ Dipartimento di Fisica, Università degli Studi and INFN, 20133 Milano, Italy.
² Physik-Department, Technische Universität München, 85748 Garching, Germany
³ Institut für Kernphysik, Forschungszentrum Jülich, 52425 Jülich, Germany
⁴ Chemical Engineering Department, Princeton University, Princeton, NJ 08544, USA
⁵ INFN Laboratori Nazionali del Gran Sasso, 67010 Assergi (AQ), Italy
⁶ Physics Department, Princeton University, Princeton, NJ 08544, USA
⁷ Dipartimento di Fisica, Università degli Studi e INFN, 16146 Genova, Italy
⁸ Lomonosov Moscow State University Skobeltsyn Institute of Nuclear Physics, 119234 Moscow, Russia
⁹ St. Petersburg Nuclear Physics Institute NRC Kurchatov Institute, 188350 Gatchina, Russia
¹⁰ AstroParticule et Cosmologie, Université Paris Diderot, CNRS/IN2P3, CEA/IRFU, Observatoire de Paris, Sorbonne Paris Cité, 75205 Paris Cedex 13, France
¹¹ Gran Sasso Science Institute, 67100 L’Aquila, Italy
¹² III. Physikalisches Institut B, RWTH Aachen University, 52062 Aachen, Germany
¹³ Joint Institute for Nuclear Research, 141980 Dubna, Russia
¹⁴ Institute of Physics and Excellence Cluster PRISMA+, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany
¹⁵ M. Smoluchowski Institute of Physics, Jagiellonian University, 30348 Krakow, Poland
¹⁶ Institute for Nuclear Research of NAS Ukraine, 03028 Kyiv, Ukraine
¹⁷ Department of Physics, Royal Holloway University of London, Egham, Surrey, TW20 0EX, UK
¹⁸ Institute of Nuclear Research (Atomki), Debrecen, Hungary
¹⁹ National Research Centre Kurchatov Institute, 123182 Moscow, Russia
²⁰ National Research Nuclear University MEPhI (Moscow Engineering Physics Institute), 115409 Moscow, Russia
²¹ Dipartimento di Chimica, Biologia e Biotecnologie, Università degli Studi e INFN, 06123 Perugia, Italy
²² Amherst Center for Fundamental Interactions and Physics Department, University of Massachusetts, Amherst, MA 01003, USA
²³ Dipartimento di Scienze Fisiche e Chimiche, Università dell’Aquila, 67100 L’Aquila, Italy
²⁴ Physics Department, Virginia Polytechnic Institute and State University, Blacksburg, VA 24061, USA
²⁵ Department of Physics, Technische Universität Dresden, 01062 Dresden, Germany

^* e-mail: davide.basilico@mi.infn.it

Published online: 8 December 2023

Abstract

Borexino has been a neutrino detector based on ultrapure liquid scintillator, located at the Laboratori Nazionali del Gran Sasso, Italy. Its main scientific goal was the real-time measurement of solar neutrino fluxes, which play an irreplaceable role for the comprehension of the mechanisms powering our star. Over the past two years, the Borexino collaboration has pursued the improvement of the CNO flux measurement, obtaining further indications about the solar metallicity. In a parallel way, Borexino has demonstrated for the first time the possibility of exploiting the directional Cherenkov information, in a liquid scintillator detector, for the detection of sub-MeV solar neutrinos.