Measurement of the $^8$B Solar Neutrino Flux Using the Full SNO+ Water Phase Dataset
Creators: name: Collaboration, SNO+
name: :
name: Allega, A.
name: Anderson, M. R.
name: Andringa, S.
name: Askins, M.
name: Asner, D. M.
name: Auty, D. J.
name: Bacon, A.
name: Barão, F.
name: Barros, N.
name: Bayes, R.
name: Beier, E. W.
name: Bialek, A.
name: Biller, S. D.
name: Blucher, E.
name: Caden, E.
name: Callaghan, E. J.
name: Chen, M.
name: Cheng, S.
name: Cleveland, B.
name: Cookman, D.
name: Corning, J.
name: Cox, M. A.
name: Dehghani, R.
name: Deloye, J.
name: Depatie, M. M.
name: Di Lodovico, F.
name: Dima, C.
name: Dittmer, J.
name: Dixon, K. H.
name: Esmaeilian, M. S.
name: Falk, E.
name: Fatemighomi, N.
name: Ford, R.
name: Gaur, A.
name: González-Reina, O. I.
name: Gooding, D.
name: Grant, C.
name: Grove, J.
name: Hall, S.
name: Hallin, A. L.
name: Hallman, D.
name: Heintzelman, W. J.
name: Helmer, R. L.
name: Hewitt, C.
name: Hreljac, B.
name: Hu, J.
name: Huang, P.
name: Hunt-Stokes, R.
name: Hussain, S. M. A.
name: Inácio, A. S.
name: Jillings, C. J.
name: Kaluzienski, S.
name: Kaptanoglu, T.
name: Kladnik, J.
name: Klein, J. R.
name: Kormos, L. L.
name: Krar, B.
name: Kraus, C.
name: Krauss, C. B.
name: Kroupová, T.
name: Lake, C.
name: Lebanowski, L.
name: Lefebvre, C.
name: Lozza, V.
name: Luo, M.
name: Maio, A.
name: Manecki, S.
name: Maneira, J.
name: Martin, R. D.
name: McCauley, N.
name: McDonald, A. B.
name: Milton, G.
name: Morris, D.
name: Mubasher, M.
name: Naugle, S.
name: Nolan, L. J.
name: O'Keeffe, H. M.
name: Gann, G. D. Orebi
name: Page, J.
name: Paleshi, K.
name: Parker, W.
name: Paton, J.
name: Peeters, S. J. M.
name: Pickard, L.
name: Quenallata, B.
name: Ravi, P.
name: Reichold, A.
name: Riccetto, S.
name: Rose, J.
name: Rosero, R.
name: Semenec, I.
name: Simms, J.
name: Skensved, P.
name: Smiley, M.
name: Svoboda, R.
name: Tam, B.
name: Tseng, J.
name: Vázquez-Jáuregui, E.
name: Virtue, C. J.
name: Ward, M.
name: Wilson, J. R.
name: Wilson, J. D.
name: Wright, A.
name: Yang, S.
name: Yeh, M.
name: Ye, Z.
name: Yu, S.
name: Zhang, Y.
name: Zuber, K.
name: Zummo, A.
Publisher: name: arXiv
Year: 2024
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: The SNO+ detector operated initially as a water Cherenkov detector. The implementation of a sealed covergas system midway through water data taking resulted in a significant reduction in the activity of $^{222}$Rn daughters in the detector and allowed the lowest background to the solar electron scattering signal above 5 MeV achieved to date. This paper reports an updated SNO+ water phase $^8$B solar neutrino analysis with a total livetime of 282.4 days and an analysis threshold of 3.5 MeV. The $^8$B solar neutrino flux is found to be $\left(2.32^{+0.18}_{-0.17}\text{(stat.)}^{+0.07}_{-0.05}\text{(syst.)}\right)\times10^{6}$ cm$^{-2}$s$^{-1}$ assuming no neutrino oscillations, or $\left(5.36^{+0.41}_{-0.39}\text{(stat.)}^{+0.17}_{-0.16}\text{(syst.)} \right)\times10^{6}$ cm$^{-2}$s$^{-1}$ assuming standard neutrino oscillation parameters, in good agreement with both previous measurements and Standard Solar Model Calculations. The electron recoil spectrum is presented above 3.5 MeV.
description: 9 pages, 10 figures, v2: minor updates to match PRD publication