M Abreu, A Allega, M R Anderson, S Andringa, D M Asner, D J Auty, A Bacon, T Baltazar, F Barão, N Barros, R Bayes, E W Beier, A Bialek, S D Biller, E Caden, M Chen, S Cheng, B Cleveland, D Cookman, J Corning, S DeGraw, R Dehghani, J Deloye, M M Depatie, C Dima, J Dittmer, K H Dixon, M S Esmaeilian, E Falk, N Fatemighomi, R Ford, S Gadamsetty, A Gaur, D Gooding, C Grant, J Grove, S Hall, A L Hallin, D Hallman, M R Hebert, W J Heintzelman, R L Helmer, C Hewitt, B Hreljac, P Huang, R Hunt-Stokes, A S Inácio, C J Jillings, S Kaluzienski, T Kaptanoglu, J Kladnik, J R Klein, L L Kormos, B Krar, C Kraus, T Kroupová, C Lake, L Lebanowski, C Lefebvre, V Lozza, M Luo, S Maguire, A Maio, S Manecki, J Maneira, R D Martin, N McCauley, A B McDonald, C Mills, G Milton, D Morris, I Morton-Blake, M Mubasher, S Naugle, L J Nolan, H M O'Keeffe, G D Orebi Gann, S Ouyang, J Page, S Pal, K Paleshi, W Parker, L J Pickard, R C Pitelka, B Quenallata, P Ravi, A Reichold, S Riccetto, J Rose, R Rosero, J Shen, J Simms, P Skensved, M Smiley, R Tafirout, B Tam, J Tseng, E Vázquez-Jáuregui, C J Virtue, F Wang, M Ward, J D Wilson, J R Wilson, A Wright, S Yang, Z Ye, M Yeh, S Yu, Y Zhang, K Zuber, A Zummo, SNO+ Collaboration
The SNO+ Collaboration reports new results on reactor antineutrino oscillations using data acquired from May 2022 through July 2025. The spectral analysis of a flux dominated by nuclear reactors at 240, 340, and 350 km yields the mass-squared difference Δm_{21}^{2}=(7.91_{-0.25}^{+0.22})×10^{-5} eV^{2}. This result is compatible with and approaches the precision of the only other long-baseline reactor antineutrino measurement, by KamLAND. Combining these measurements, along with those from solar neutrino experiments, the global values of the neutrino mixing parameters become Δm_{21}^{2}=(7.59±0.17)×10^{-5} eV^{2} and sin^{2}θ_{12}=0.310±0.012. The analysis of geoneutrinos at SNO+ is also improved, with a measured signal of 48_{-12}^{+14} TNU.