New Constraint on the Local Relic Neutrino Background Overdensity with the First KATRIN Data Runs
Abstract
We report on the direct cosmic relic neutrino background search from the first two science runs of the KATRIN experiment in 2019. Beta-decay electrons from a high-purity molecular tritium gas source are analyzed by a high-resolution MAC-E filter around the kinematic endpoint at 18.57 keV. The analysis is sensitive to a local relic neutrino overdensity of 9.7e10 (1.1e11) at a 90% (95%) confidence level. A fit of the integrated electron spectrum over a narrow interval around the kinematic endpoint accounting for relic neutrino captures in the Tritium source reveals no significant overdensity. This work improves the results obtained by the previous kinematic neutrino mass experiments at Los Alamos and Troitsk. We furthermore update the projected final sensitivity of the KATRIN experiment to <1e10 at 90% confidence level, by relying on updated operational conditions.
Keywords
Cite
@article{arxiv.2202.04587,
title = {New Constraint on the Local Relic Neutrino Background Overdensity with the First KATRIN Data Runs},
author = {M. Aker and D. Batzler and A. Beglarian and J. Behrens and A. Berlev and U. Besserer and B. Bieringer and F. Block and S. Bobien and B. Bornschein and L. Bornschein and M. Böttcher and T. Brunst and T. S. Caldwell and R. M. D. Carney and S. Chilingaryan and W. Choi 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 J. A. Formaggio and F. M. Fränkle and G. B. Franklin and F. Friedel and A. Fulst and K. Gauda and A. S. Gavin and W. Gil and F. Glück and R. Grössle and R. Gumbsheimer and V. Hannen and N. Haußmann and K. Helbing and S. Hickford and R. Hiller and D. Hillesheimer and D. Hinz and T. Höhn and T. Houdy and A. Huber and A. Jansen and C. Karl and F. Kellerer and J. Kellerer and M. Kleifges and M. Klein and C. Köhler and L. Köllenberger and A. Kopmann and M. Korzeczek and A. Kovalík and B. Krasch and H. Krause and L. La Cascio and T. Lasserre and T. L. Le and O. Lebeda and B. Lehnert and A. Lokhov and M. Machatschek and E. Malcherek and M. Mark and A. Marsteller and E. L. Martin and C. Melzer and S. Mertens and J. Mostafa and K. Müller and H. Neumann and S. Niemes and P. Oelpmann and D. S. Parno and A. W. P. Poon and J. M. L. Poyato and F. Priester and J. Ráliš and S. Ramachandran and R. G. H. Robertson and W. Rodejohann 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 L. Schimpf and M. Schlösser and K. Schlösser and L. Schlüter and S. Schneidewind and M. Schrank and A. Schwemmer and M. Šefčík and V. Sibille and D. Siegmann and M. Slezák and F. Spanier and M. Steidl and M. Sturm and H. H. Telle and L. A. Thorne and T. Thümmler and N. Titov and I. Tkachev and K. Urban and K. Valerius and D. Vénos and A. P. Vizcaya Hernández and C. Weinheimer and S. Welte and J. Wendel and M. Wetter and C. Wiesinger and J. F. Wilkerson and J. Wolf and S. Wüstling and J. Wydra and W. Xu and S. Zadoroghny and G. Zeller},
journal= {arXiv preprint arXiv:2202.04587},
year = {2022}
}
Comments
7 pages, 7 figures