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

Abstract

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.

6 pages, 6 figures. Accepted manuscript by PRD

References in corpus (8)

• Observation of electron-antineutrino disappearance at Daya Bay
• Search for the Majorana Nature of Neutrinos in the Inverted Mass Ordering Region with KamLAND-Zen
• The SNO+ Experiment
• Final results of Borexino on CNO solar neutrinos
• Development, characterisation, and deployment of the SNO+ liquid scintillator
• First Directional Measurement of sub-MeV Solar Neutrinos with Borexino
• Cherenkov and Scintillation Separation in Water-Based Liquid Scintillator using an LAPPD
• EOS: a demonstrator of hybrid optical detector technology

Cited by in corpus (6)

• Solar fusion III: New data and theory for hydrogen-burning stars
• Initial measurement of reactor antineutrino oscillation at SNO+
• Study of neutron production for 360 GeV cosmic muons
• New Spallation Background Rejection Techniques to Greatly Improve the Solar Neutrino Sensitivity of JUNO
• Canadian Contributions to the Search for Neutrinoless Double Beta Decay
• Supernova Detection at SNOLAB