在 SNO+ 对反应堆反中微子振荡进行初步测量

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
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引用次数: 0

摘要

SNO+合作小组首次报告了利用114吨年数据对长基线反应堆反中微子振荡的能谱分析。将中微子振荡概率与观测到的能谱拟合,得到了对中微子质量平方差 $\Delta m^2_{21}$的约束。在先前测量所允许的范围内,最佳拟合的 $\Delta m^2_{21}$ 是(8.85$^{+1.10}_{-1.33}$) $\times$ 10$^{-5}$ eV$^2$。这种测量将在SNO+的下一阶段继续进行,预计大约三年的数据将超过目前全球对$\Delta m^2_{21}$的精度。
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Initial measurement of reactor antineutrino oscillation at SNO+
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.
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