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.

arXiv comment6 pages, 6 figures. Accepted manuscript by PRD

References in corpus (31)

• First Results from KamLAND: Evidence for Reactor Anti-Neutrino Disappearance
• Observation of electron-antineutrino disappearance at Daya Bay
• Observation of Reactor Electron Antineutrino Disappearance in the RENO Experiment
• Neutrino Physics with JUNO
• The Borexino detector at the Laboratori Nazionali del Gran Sasso
• Reactor electron antineutrino disappearance in the Double Chooz experiment
• Current Status and Future Prospects of the SNO+ Experiment
• Search for the Majorana Nature of Neutrinos in the Inverted Mass Ordering Region with KamLAND-Zen
• Experimental evidence of neutrinos produced in the CNO fusion cycle in the Sun
• Grand Unified Neutrino Spectrum at Earth: Sources and Spectral Components
• The Liquid Scintillator Neutrino Detector and LAMPF Neutrino Source
• The MiniBooNE Detector
• Theia: An advanced optical neutrino detector
• The SNO+ Experiment
• Letter of Intent: Jinping Neutrino Experiment
• Separation of Scintillation and Cherenkov Lights in Linear Alkyl Benzene
• Measuring Directionality in Double-Beta Decay and Neutrino Interactions with Kiloton-Scale Scintillation Detectors
• Final results of Borexino on CNO solar neutrinos
• Slow Liquid Scintillator Candidates for MeV-scale Neutrino Experiments
• Cherenkov and Scintillation Light Separation in Organic Liquid Scintillators
• Probing Majorana neutrinos in the regime of the normal mass hierarchy
• Development, characterisation, and deployment of the SNO+ liquid scintillator
• Slow Fluors for Effective Separation of Cherenkov Light in Liquid Scintillators
• Spectral Photon Sorting For Large-Scale Cherenkov and Scintillation Detectors
• MeV-scale performance of water-based and pure liquid scintillator detectors
• First Directional Measurement of sub-MeV Solar Neutrinos with Borexino
• Cherenkov and Scintillation Light Separation Using Wavelength in LAB Based Liquid Scintillator
• Cherenkov and Scintillation Separation in Water-Based Liquid Scintillator using an LAPPD
• Detecting Cherenkov Light From 1-2 MeV Electrons in Linear Alkylbenzene
• EOS: a demonstrator of hybrid optical detector technology
• Sensitivity of a low threshold directional detector to CNO-cycle solar neutrinos

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