Event-by-event direction reconstruction of solar neutrinos in a high light-yield liquid scintillator

Research output: Contribution to journalResearch articleContributedpeer-review

Contributors

  • (The SNO+ Collaboration) - (Author)
  • Chair of Nuclear Physics
  • Queen's University Kingston
  • Laboratório de Instrumentação e Física Experimental de Partículas
  • University of Lisbon
  • University of California at Berkeley
  • Lawrence Berkeley National Laboratory
  • University of Alberta
  • University of Pennsylvania
  • SNOLAB
  • Laurentian University
  • University of Coimbra
  • University of Sussex
  • University of Oxford
  • The University of Chicago
  • University of Liverpool (UOL)
  • King's College London (KCL)
  • TUD Dresden University of Technology
  • Universidad Nacional Autónoma de México
  • Boston University
  • TRIUMF

Abstract

The direction of individual B8 solar neutrinos has been reconstructed using the SNO+ liquid scintillator detector. Prompt, directional Cherenkov light was separated from the slower, isotropic scintillation light using time information, and a maximum likelihood method was used to reconstruct the direction of individual scattered electrons. A clear directional signal was observed, correlated with the solar angle. The observation was aided by a period of low primary fluor concentration that resulted in a slower scintillator decay time. This is the first time that event-by-event direction reconstruction in high light-yield liquid scintillator has been demonstrated in a large-scale detector.

Details

Original languageEnglish
Article number072002
JournalPhysical review d
Volume109
Issue number7
Publication statusPublished - 1 Apr 2024
Peer-reviewedYes

Keywords

ASJC Scopus subject areas