基于Borexino的地球中微子综合分析
高能物理 - 实验
2020-02-18 v2 地球物理
摘要
本文报道利用意大利LNGS的Borexino探测器采集的3262.74天数据进行的地球中微子测量。通过观测来自U和Th的个地球中微子(68%区间)，获得了 TNU的信号，总精度为%。该结果假设与球粒CI陨石中相同的Th/U质量比，但当将U和Th的贡献作为自由参数拟合时也发现了兼容的结果。反应堆的反中微子本底未加约束地拟合，发现与预期兼容。在利用本地地壳知识时，观测到来自地幔的信号的零假设在99.0%置信水平被排除。测得的地幔信号为 TNU，对应于地幔中U和Th产生的放射性热为 TW (68%区间)。假设地幔中K贡献为18%且岩石圈放射性热为 TW，Borexino对地球总放射性热的估计为 TW，对应于0.78的对流尤里比。这些值与不同的地质模型兼容，然而与预测热产生元素浓度最低的那些模型存在2.4张力。通过对反应堆反中微子本底施加约束拟合数据，排除了地球中心存在功率大于2.4 TW的假想地球反应堆(95%置信水平)。特别关注了所有分析细节，这对下一代地球中微子测量应具有参考价值。
引用
@article{arxiv.1909.02257,
title = {Comprehensive geoneutrino analysis with Borexino},
author = {M. Agostini and K. Altenmüller and S. Appel and V. Atroshchenko and Z. Bagdasarian and D. Basilico and G. Bellini and J. Benziger and D. Bick and G. Bonfini and D. Bravo and B. Caccianiga and F. Calaprice and A. Caminata and L. Cappelli and P. Cavalcante and F. Cavanna and A. Chepurnov and K. Choi and D. D'Angelo and S. Davini and A. Derbin and A. Di Giacinto and V. Di Marcello and X. F. Ding and A. Di Ludovico and L. Di Noto and I. Drachnev and G. Fiorentini and A. Formozov and D. Franco and F. Gabriele and C. Galbiati and M. Gschwender and C. Ghiano and M. Giammarchi and A. Goretti and M. Gromov and D. Guffanti and C. Hagner and E. Hungerford and Aldo Ianni and Andrea Ianni and A. Jany and D. Jeschke and S. Kumaran and V. Kobychev and G. Korga and T. Lachenmaier and T. Lasserre and M. Laubenstein and E. Litvinovich and P. Lombardi and I. Lomskaya and L. Ludhova and G. Lukyanchenko and L. Lukyanchenko and I. Machulin and F. Mantovani and G. Manuzio and S. Marcocci and J. Maricic and J. Martyn and E. Meroni and M. Meyer and L. Miramonti and M. Misiaszek and M. Montuschi and V. Muratova and B. Neumair and M. Nieslony and L. Oberauer and A. Onillon and V. Orekhov and F. Ortica and M. Pallavicini and L. Papp and Ö. Penek and L. Pietrofaccia and N. Pilipenko and A. Pocar and G. Raikov and M. T. Ranalli and G. Ranucci and A. Razeto and A. Re and M. Redchuk and B. Ricci and A. Romani and N. Rossi and S. Rottenanger and S. Schönert and D. Semenov and M. Skorokhvatov and O. Smirnov and A. Sotnikov and V. Strati and Y. Suvorov and R. Tartaglia and G. Testera and J. Thurn and E. Unzhakov and A. Vishneva and M. Vivier and R. B. Vogelaar and F. von Feilitzsch and M. Wojcik and M. Wurm and O. Zaimidoroga and S. Zavatarelli and K. Zuber and G. Zuzel},
journal= {arXiv preprint arXiv:1909.02257},
year = {2020}
}
备注
69 pages, 56 Figures (some composed of multiple files), 17 Tables, 135 References