Final results of Borexino on CNO solar neutrinos

• DOI: 10.1103/physrevd.108.102005
• Publication Date: 2023-11-14T10:22:55Z
• Authors: D. Basilico; G. Bellini; J. Benziger; R. Biondi; B. Caccianiga; F. Calaprice; A. Caminata; A. Chepurnov; D. D’Angelo; A. Derbin; A. Di Giacinto; V. Di Marcello; X. F. Ding; A. Di Ludovico; L. Di Noto; I. Drachnev; D. Franco; C. Galbiati; C. Ghiano; M. Giammarchi; A. Goretti; M. Gromov; D. Guffanti; Aldo Ianni; Andrea Ianni; A. Jany; V. Kobychev; G. Korga; S. Kumaran; M. Laubenstein; E. Litvinovich; P. Lombardi; I. Lomskaya; L. Ludhova; I. Machulin; J. Martyn; E. Meroni; L. Miramonti; M. Misiaszek; V. Muratova; R. Nugmanov; L. Oberauer; V. Orekhov; F. Ortica; M. Pallavicini; L. Pelicci; Ö. Penek; L. Pietrofaccia; N. Pilipenko; A. Pocar; G. Raikov; M. T. Ranalli; G. Ranucci; A. Razeto; A. Re; N. Rossi; S. Schönert; D. Semenov; G. Settanta; M. Skorokhvatov; A. Singhal; O. Smirnov; A. Sotnikov; R. Tartaglia; G. Testera; E. Unzhakov; F. L. Villante; A. Vishneva; R. B. Vogelaar; F. von Feilitzsch; M. Wojcik; M. Wurm; S. Zavatarelli; K. Zuber; G. Zuzel
• Keywords: Borexino

We report the first measurement of CNO solar neutrinos by Borexino that uses Correlated Integrated Directionality (CID) method, exploiting sub-dominant Cherenkov light in liquid scintillator detector. The directional information origin is preserved fast photons from neutrino scattered electrons, and used to discriminate between signal background. independent spectral on which previous measurements were based. While analysis could only be applied Phase-III dataset, can use complete data taking period 2007 2021. absence has been rejected with >5{\sigma} credible level using Bayesian statistics. obtained without an external constraint $^{210}$Bi contamination scintillator, was approach. final most precise then combining new CID-based result improved fit dataset. Including statistical systematic errors, extracted interaction rate $R(\mathrm{CNO})=6.7^{+1.2}_{-0.8} \, \mathrm{cpd/100 tonnes}$. Taking into account flavor conversion, resulting flux at Earth $\Phi_\mathrm{CNO}=6.7 ^{+1.2}_{-0.8} \times 10^8 \mathrm{cm^{-2} s^{-1}}$, agreement high metallicity Standard Solar Models. results described this work reinforce role event large-scale detectors open up avenues for next-generation or hybrid experiments.