Directionality measurement of CNO neutrinos with Borexino detector

Research output: Contribution to journalConference articleContributedpeer-review

Contributors

  • Borexino Collaboration - (Author)
  • Chair of Nuclear Physics
  • University of Milan
  • Princeton University
  • National Institute for Nuclear Physics
  • University of Genoa
  • Lomonosov Moscow State University
  • RAS - Saint Petersburg Nuclear Physics Institute
  • Institute for Celestial Mechanics and Computation of Ephemerides
  • Gran Sasso Science Institute
  • Joint Institute for Nuclear Research
  • Johannes Gutenberg University Mainz
  • Jagiellonian University in Kraków
  • National Academy of Sciences of Ukraine
  • Royal Holloway University of London
  • Institute for Nuclear Research
  • Jülich Research Centre
  • RWTH Aachen University
  • Russian Research Centre Kurchatov Institute
  • Moscow Engineering Physics Institute
  • Technical University of Munich
  • University of Perugia
  • TUD Dresden University of Technology

Abstract

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.

Details

Original languageEnglish
Article number158
JournalProceedings of Science
Volume441
Publication statusPublished - 22 Mar 2024
Peer-reviewedYes

Conference

Title18th International Conference on Topics in Astroparticle and Underground Physics
Abbreviated titleTAUP 2023
Conference number18
Duration28 August - 1 September 2023
Website
LocationUniversität Wien
CityWien
CountryAustria

Keywords

ASJC Scopus subject areas