In the following, the first measurement of CNO solar neutrinos obtained by Borexino by exploiting the directional information retained by solar neutrino is summarized [1]. The Correlated Integrated Directionality (CID) method makes use of the sub-dominant Cherenkov light emitted by the Borexino liquid scintillator to correlate between the first few detected photons in each event and the known position of the Sun for each event and, therefore, to discriminate between the signal and the radioactive background on a statistical basis. By applying this technique to the complete 2007-2021 Borexino dataset, the hypothesis of no CNO neutrinos is rejected with >5σ posterior probability, without making use of any information on the background levels in the scintillator.

Original languageEnglish
Article number158
JournalProceedings of Science
StatePublished - 22 Mar 2024
Event18th International Conference on Topics in Astroparticle and Underground Physics, TAUP 2023 - Vienna, Austria
Duration: 28 Aug 20231 Sep 2023


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