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  • 2309.06341v1

    Submitted manuscript, 441 KB, PDF document

  • Direction_Paper_submitted

    Accepted author manuscript, 401 KB, PDF document


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Event-by-Event Direction Reconstruction of Solar Neutrinos in a High Light-Yield Liquid Scintillator

Research output: Contribution to Journal/MagazineJournal articlepeer-review

Article number072002
<mark>Journal publication date</mark>3/04/2024
<mark>Journal</mark>Physical Review D
Issue number7
Publication StatusPublished
<mark>Original language</mark>English


The direction of individual $^8$B 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.

Bibliographic note

6 pages, 6 figures. Prepared for submission to PRL