超级神冈-IV 中的太阳中微子测量
高能物理 - 实验
2023-06-07 v1 仪器与探测器
摘要
升级的电子学系统、改进的水系统动力学、更好的校准和分析技术使得超级神冈-IV 能够清晰地观测到极低能量的 8B 太阳中微子相互作用，反冲电子动能低至 3.49 MeV。超级神冈-IV 的数据采集始于 2008 年 9 月；本文包含截至 2014 年 2 月的数据，总活时间为 1664 天。假设无振荡，测得的太阳中微子通量为 (2.308 ± 0.020 (统计) + 0.039 - 0.040 (系统)) × 10^6 / (cm^2·sec)。观测到的反冲电子能谱与中微子振荡无畸变一致。对 SK-IV 中微子-电子弹性散射率的预期太阳天顶角变化幅度进行扩展最大似然拟合，得到昼夜不对称性为 (-3.6 ± 1.6 (统计) ± 0.6 (系统))%。SK-IV 太阳中微子数据确定太阳混合角为 sin^2 θ_12 = 0.327 + 0.026 - 0.031，所有 SK 太阳数据（SK-I、SK-II、SK-III 和 SK-IV）测得该角为 sin^2 θ_12 = 0.334 + 0.027 - 0.023，确定的质量平方差为 Δm^2_21 = 4.8 + 1.5 - 0.8 × 10^-5 eV^2。
引用
@article{arxiv.1606.07538,
title = {Solar Neutrino Measurements in Super-Kamiokande-IV},
author = {Kamiokande Collaboration and K. Abe and Y. Haga and Y. Hayato and M. Ikeda and K. Iyogi and J. Kameda and Y. Kishimoto and Ll. Marti and M. Miura and S. Moriyama and M. Nakahata and T. Nakajima and S. Nakayama and A. Orii and H. Sekiya and M. Shiozawa and Y. Sonoda and A. Takeda and H. Tanaka and Y. Takenaga and S. Tasaka and T. Tomura and K. Ueno and T. Yokozawa and R. Akutsu and T. Irvine and H. Kaji and T. Kajita and I. Kametani and K. Kaneyuki and K. P. Lee and Y. Nishimura and T. McLachlan and K. Okumura and E. Richard and L. Labarga and P. Fernandez and F. d. M. Blaszczyk and J. Gustafson and C. Kachulis and E. Kearns and 32 J. L. Raaf and J. L. Stone and 32 L. R. Sulak and S. Berkman and S. Tobayama and M. Goldhaber and K. Bays and G. Carminati and N. J. Griskevich and W. R. Kropp and S. Mine and A. Renshaw and M. B. Smy and H. W. Sobel and V. Takhistov and P. Weatherly and K. S. Ganezer and B. L. Hartfiel and J. Hill and W. E. Keig and N. Hong and J. Y. Kim and I. T. Lim and R. G. Park and T. Akiri and J. B. Albert and A. Himmel and Z. Li and E. O'Sullivan and K. Scholberg and C. W. Walter and T. Wongjirad and T. Ishizuka and T. Nakamura and J. S. Jang and K. Choi and J. G. Learned and S. Matsuno and S. N. Smith and M. Friend and T. Hasegawa and T. Ishida and T. Ishii and T. Kobayashi and T. Nakadaira and K. Nakamura and K. Nishikawa and Y. Oyama and K. Sakashita and T. Sekiguchi and T. Tsukamoto and Y. Nakano and A. T. Suzuki and Y. Takeuchi and T. Yano and S. V. Cao and T. Hayashino and T. Hiraki and S. Hirota and K. Huang and K. Ieki and M. Jiang and T. Kikawa and A. Minamino and A. Murakami and T. Nakaya and N. D. Patel and K. Suzuki and S. Takahashi and R. A. Wendell and Y. Fukuda and Y. Itow and G. Mitsuka and F. Muto and T. Suzuki and P. Mijakowski and K. Frankiewicz and J. Hignight and J. Imber and C. K. Jung and X. Li and J. L. Palomino and G. Santucci and I. Taylor and C. Vilela and M. J. Wilking and C. Yanagisawa and D. Fukuda and H. Ishino and T. Kayano and A. Kibayashi and Y. Koshio and T. Mori and M. Sakuda and J. Takeuchi and R. Yamaguchi and Y. Kuno and R. Tacik and S. B. Kim and H. Okazawa and Y. Choi and K. Ito and K. Nishijima and M. Koshiba and Y. Totsuka and Y. Suda and M. Yokoyama and C. Bronner and R. G. Calland and M. Hartz and K. Martens and Y. Obayashi and Y. Suzuki and M. R. Vagins and C. M. Nantais and J. F. Martin and P. de Perio and H. A. Tanaka and A. Konaka and S. Chen and H. Sui and L. Wan and Z. Yang and H. Zhang and Y. Zhang and K. Connolly and M. Dziomba and R. J. Wilkes},
journal= {arXiv preprint arXiv:1606.07538},
year = {2023}
}
备注
Submitted to Physical Review D; 23 pages, 40 figures