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

Journal Article · 03 April 2024 · Physical Review. D.

DOI: https://doi.org/10.1103/PhysRevD.109.072002 · OSTI ID:2333039

Allega, A.; Anderson, M. R.; Andringa, S.; Antunes, J.; Askins, M.; Auty, D. J.; Bacon, A.; Baker, J.; Barros, N.; Barão, F.; Bayes, R.; Beier, E. W.; Bezerra, T. S.; Bialek, A.; Biller, S. D.; Blucher, E.; Caden, E.; Callaghan, E. J.; Chen, M.; Cheng, S. ; Cleveland, B.; Cookman, D.; Corning, J.; Cox, M. A.; Dehghani, R.; Deloye, J.; Depatie, M. M.; Di Lodovico, F.; Dittmer, J.; Dixon, K. H.; Falk, E.; Fatemighomi, N.; Ford, R.; Gaur, A.; González-Reina, O. I.; Gooding, D.; Grant, C.; Grove, J.; Hall, S.; Hallin, A. L.; Heintzelman, W. J.; Helmer, R. L.; Hewitt, C.; Hreljac, B.; Howard, V.; Hu, J.; Hunt-Stokes, R.; Hussain, S. M. A.; Inácio, A. S.; Jillings, C. J.; Kaluzienski, S.; Kaptanoglu, T.; Khaghani, P.; Khan, H.; Klein, J. R.; Kormos, L. L.; Krar, B.; Kraus, C.; Krauss, C. B.; Kroupová, T.; Lake, C.; Lebanowski, L.; Lee, J.; Lefebvre, C.; Lin, Y. H.; Lozza, V.; Luo, M.; Maio, A.; Manecki, S.; Maneira, J.; Martin, R. D.; McCauley, N.; McDonald, A. B.; Mills, C.; Milton, G.; Morton-Blake, I.; Mubasher, M.; Molina Colina, A.; Morris, D.; Naugle, S.; Nolan, L. J.; O’Keeffe, H. M.; Orebi Gann, G. D.; Page, J.; Paleshi, K.; Parker, W.; Paton, J. ; Peeters, S. J. M.; Pickard, L.; Ravi, P.; Reichold, A.; Riccetto, S.; Rigan, M.; Rose, J.; Rosero, R.; Rumleskie, J.; Semenec, I.; Skensved, P.; Smiley, M.; Smith, J.; Svoboda, R.; Tam, B.; Tseng, J.; Valder, S.; Vázquez-Jáuregui, E.; Virtue, C. J.; Wang, J.; Ward, M.; Wilson, J. R.; Wilson, J. D.; Wright, A.; Yanez, J. P.; Yang, S.; Yeh, M.; Ye, Z.; Yu, S.; Zhang, Y.; Zuber, K.; Zummo, A.

The direction of individual ${}^8\mathrm{B}$ solar neutrinos has been reconstructed using the $\mathrm{SNO}+$ 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. Published by the American Physical Society 2024

• Sponsoring Organization: USDOE
• OSTI ID: 2333039
• Journal Information: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 7 Vol. 109; ISSN PRVDAQ; ISSN 2470-0010
• Publisher: American Physical SocietyCopyright Statement
• Country of Publication: United States
• Language: English