Direct neutrino-mass measurement based on 259 days of KATRIN data
Abstract
The fact that neutrinos carry a non-vanishing rest mass is evidence of physics beyond the Standard Model of elementary particles. Their absolute mass bears important relevance from particle physics to cosmology. In this work, we report on the search for the effective electron antineutrino mass with the KATRIN experiment. KATRIN performs precision spectroscopy of the tritium -decay close to the kinematic endpoint. Based on the first five neutrino-mass measurement campaigns, we derive a best-fit value of , resulting in an upper limit of at 90 % confidence level. With six times the statistics of previous data sets, amounting to 36 million electrons collected in 259 measurement days, a substantial reduction of the background level and improved systematic uncertainties, this result tightens KATRIN's previous bound by a factor of almost two.
Keywords
Cite
@article{arxiv.2406.13516,
title = {Direct neutrino-mass measurement based on 259 days of KATRIN data},
author = {M. Aker and D. Batzler and A. Beglarian and J. Behrens and J. Beisenkötter and M. Biassoni and B. Bieringer and Y. Biondi and F. Block and S. Bobien and M. Böttcher and B. Bornschein and L. Bornschein and T. S. Caldwell and M. Carminati and A. Chatrabhuti and S. Chilingaryan and B. A. Daniel and K. Debowski and M. Descher and D. Díaz Barrero and P. J. Doe and O. Dragoun and G. Drexlin and F. Edzards and K. Eitel and E. Ellinger and R. Engel and S. Enomoto and A. Felden and C. Fengler and C. Fiorini and J. A. Formaggio and C. Forstner and F. M. Fränkle and K. Gauda and A. S. Gavin and W. Gil and F. Glück and S. Grohmann and R. Grössle and R. Gumbsheimer and N. Gutknecht and V. Hannen and L. Hasselmann and N. Haußmann and K. Helbing and H. Henke and S. Heyns and S. Hickford and R. Hiller and D. Hillesheimer and D. Hinz and T. Höhn and A. Huber and A. Jansen and C. Karl and J. Kellerer and K. Khosonthongkee and M. Kleifges and M. Klein and J. Kohpeiß and C. Köhler and L. Köllenberger and A. Kopmann and N. Kovač and A. Kovalík and H. Krause and L. La Cascio and T. Lasserre and J. Lauer and T. Le and O. Lebeda and B. Lehnert and G. Li and A. Lokhov and M. Machatschek and M. Mark and A. Marsteller and E. L. Martin and C. Melzer and S. Mertens and S. Mohanty and J. Mostafa and K. Müller and A. Nava and H. Neumann and S. Niemes and A. Onillon and D. S. Parno and M. Pavan and U. Pinsook and A. W. P. Poon and J. M. Lopez Poyato and S. Pozzi and F. Priester and J. Ráliš and S. Ramachandran and R. G. H. Robertson and C. Rodenbeck and M. Röllig and C. Röttele and M. Ryšavý and R. Sack and A. Saenz and R. Salomon and P. Schäfer and M. Schlösser and K. Schlösser and L. Schlüter and S. Schneidewind and U. Schnurr and M. Schrank and J. Schürmann and A. Schütz and A. Schwemmer and A. Schwenck and M. Šefčík and D. Siegmann and F. Simon and F. Spanier and D. Spreng and W. Sreethawong and M. Steidl and J. Štorek and X. Stribl and M. Sturm and N. Suwonjandee and N. Tan Jerome and H. H. Telle and L. A. Thorne and T. Thümmler and S. Tirolf and N. Titov and I. Tkachev and K. Urban and K. Valerius and D. Vénos and C. Weinheimer and S. Welte and J. Wendel and C. Wiesinger and J. F. Wilkerson and J. Wolf and S. Wüstling and J. Wydra and W. Xu and S. Zadorozhny and G. Zeller},
journal= {arXiv preprint arXiv:2406.13516},
year = {2025}
}
Comments
61 pages, 20 figures, 2 tables