Initial measurement of reactor antineutrino oscillation at SNO+

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

arxiv（2024）

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摘要

The SNO+ collaboration reports its first spectral analysis of long-baseline reactor antineutrino oscillation using 114 tonne-years of data. Fitting the neutrino oscillation probability to the observed energy spectrum yields constraints on the neutrino mass-squared difference Δ m^2_21. In the ranges allowed by previous measurements, the best-fit Δ m^2_21 is (8.85^+1.10_-1.33) × 10^-5 eV^2. This measurement is continuing in the next phases of SNO+ and is expected to surpass the present global precision on Δ m^2_21 with about three years of data.

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