基于 259 天 KATRIN 数据的惰性中微子搜索
高能物理 - 实验
2025-03-25 v1
摘要
中微子是宇宙中最丰富的基本物质粒子，在粒子物理学和宇宙学中发挥着关键作用。约 25 年前发现的中微子振荡揭示了三种已知中微子味之间的混合。反应堆和放射性源实验的异常结果暗示了可能存在第四种中微子态，即惰性中微子，它不通过弱相互作用发生反应。KATRIN 实验最初旨在通过氚 衰变测量中微子质量，同时也搜索由这些异常所暗示的惰性中微子。惰性中微子信号将表现为 衰变能谱中的畸变，其特征是与惰性中微子质量相关的曲率不连续性（扭折）。该特征仅依赖于谱的形状而非其绝对归一化，为反应堆实验提供了一种稳健且互补的方法。KATRIN 检查了在 259 个测量日内记录的 3600 万个氚 衰变电子在端点以下最后 40 电子伏特内的能谱。结果排除了镓异常所暗示的大部分参数空间，并对 Neutrino-4 的声明提出了挑战。与其他中微子消失实验一起，KATRIN 探测了从几分之一电子伏特平方到数百电子伏特平方的惰性-活性质量分裂，排除了混合角大于百分之几的轻惰性中微子。
引用
@article{arxiv.2503.18667,
title = {Sterile-neutrino search based on 259 days of KATRIN data},
author = {Himal Acharya and Max Aker and Dominic Batzler and Armen Beglarian and Justus Beisenkötter and Matteo Biassoni and Benedikt Bieringer and Yanina Biondi and Matthias Böttcher and Beate Bornschein and Lutz Bornschein and Marco Carminati and Auttakit Chatrabhuti and Suren Chilingaryan and Deseada Díaz Barrero and Byron A. Daniel and Martin Descher and Otokar Dragoun and Guido Drexlin and Frank Edzards and Klaus Eitel and Enrico Ellinger and Ralph Engel and Sanshiro Enomoto and Luca Fallböhmer and Arne Felden and Caroline Fengler and Carlo Fiorini and Joseph A. Formaggio and Christian Forstner and Florian M. Fränkle and Giulio Gagliardi and Kevin Gauda and Andrew S. Gavin and Woosik Gil and Ferenc Glück and Robin Grössle and Thomas Höhn and Khushbakht Habib and Volker Hannen and Leonard Haßelmann and Klaus Helbing and Hanna Henke and Svenja Heyns and Roman Hiller and David Hillesheimer and Dominic Hinz and Alexander Jansen and Christoph Köhler and Khanchai Khosonthongkee and Joshua Kohpeiß and Leonard Köllenberger and Andreas Kopmann and Neven Kovač and Luisa La Cascio and Leo Laschinger and Thierry Lasserre and Joscha Lauer and Thanh-Long Le and Ondřej Lebeda and Bjoern Lehnert and Alexey Lokhov and Moritz Machatschek and Alexander Marsteller and Eric L. Martin and Kirsten McMichael and Christin Melzer and Lukas Erik Mettler and Susanne Mertens and Shailaja Mohanty and Jalal Mostafa and Immanuel Müller and Andrea Nava and Holger Neumann and Simon Niemes and Irene Nutini and Anthony Onillon and Diana S. Parno and Maura Pavan and Udomsilp Pinsook and Jan Plößner and Alan W. P. Poon and Jose Manuel Lopez Poyato and Florian Priester and Jan Ráliš and Marco Röllig and Shivani Ramachandran and R G. Hamish Robertson and Caroline Rodenbeck and Rudolf Sack and Alejandro Saenz and Richard Salomon and Jannis Schürmann and Peter Schäfer and Ann-Kathrin Schütz and Magnus Schlösser and Lisa Schlüter and Sonja Schneidewind and Ulrich Schnurr and Alessandro Schwemmer and Adrian Schwenck and Michal Šefčík and Jakkapat Seeyangnok and Daniel Siegmann and Frank Simon and Julanan Songwadhana and Felix Spanier and Daniela Spreng and Warintorn Sreethawong and Markus Steidl and Jaroslav Štorek and Xaver Stribl and Michael Sturm and Narumon Suwonjandee and Nicholas Tan Jerome and Helmut H. H. Telle and Thomas Thümmler and Larisa A. Thorne and Nikita Titov and Igor Tkachev and Kerstin Trost and Korbinian Urban and Drahoš Vénos and Kathrin Valerius and Sascha Wüstling and Christian Weinheimer and Stefan Welte and Jürgen Wendel and Christoph Wiesinger and John F. Wilkerson and Joachim Wolf and Johanna Wydra and Weiran Xu and Sergey Zadorozhny and Genrich Zeller},
journal= {arXiv preprint arXiv:2503.18667},
year = {2025}
}
备注
37 pages, 16 figures