학술논문
Initial measurement of reactor antineutrino oscillation at SNO+
Document Type
Working Paper
Author
Collaboration, SNO; Allega, A.; Anderson, M. R.; Andringa, S.; Askins, M.; Auty, D. J.; Bacon, A.; Baker, J.; Barão, F.; Barros, N.; 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.; Dima, C.; Dittmer, J.; Dixon, K. H.; Esmaeilian, M. S.; Falk, E.; Fatemighomi, N.; Ford, R.; Gaur, A.; González-Reina, O. I.; Gooding, D.; Grant, C.; Grove, J.; Hall, S.; Hallin, A. L.; Hallman, D.; Heintzelman, W. J.; Helmer, R. L.; Hewitt, C.; Howard, V.; Hreljac, B.; Hu, J.; Huang, P.; Hunt-Stokes, R.; Hussain, S. M. A.; Inácio, A. S.; Jillings, C. J.; Kaluzienski, S.; Kaptanoglu, T.; Khan, H.; Kladnik, J.; Klein, J. R.; Kormos, L. L.; Krar, B.; Kraus, C.; Krauss, C. B.; Kroupová, T.; Lake, C.; Lebanowski, L.; Lefebvre, C.; Lozza, V.; Luo, M.; Maio, A.; Manecki, S.; Maneira, J.; Martin, R. D.; McCauley, N.; McDonald, A. B.; Mills, C.; Milton, G.; Colina, A. Molina; Morris, D.; Morton-Blake, I.; Mubasher, M.; Naugle, S.; Nolan, L. J.; O'Keeffe, H. M.; Gann, G. D. Orebi; Page, J.; Paleshi, K.; Parker, W.; Paton, J.; Peeters, S. J. M.; Pickard, L.; Quenallata, B.; Ravi, P.; Reichold, A.; Riccetto, S.; Rose, J.; Rosero, R.; Semenec, I.; Simms, J.; Skensved, P.; Smiley, M.; Smith, J.; Svoboda, R.; Tam, B.; Tseng, J.; Vázquez-Jáuregui, E.; Veinot, J. G. C.; Virtue, C. J.; Ward, M.; Weigand, J. J.; Wilson, J. R.; Wilson, J. D.; Wright, A.; Yang, S.; Yeh, M.; Ye, Z.; Yu, S.; Zhang, Y.; Zuber, K.; Zummo, A.
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Abstract
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 $\Delta m^2_{21}$. In the ranges allowed by previous measurements, the best-fit $\Delta m^2_{21}$ is (8.85$^{+1.10}_{-1.33}$) $\times$ 10$^{-5}$ eV$^2$. This measurement is continuing in the next phases of SNO+ and is expected to surpass the present global precision on $\Delta m^2_{21}$ with about three years of data.