1. Search for keV-scale sterile neutrinos with the first KATRIN data
- Author
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Aker, M, Batzler, D, Beglarian, A, Behrens, J, Berlev, A, Besserer, U, Bieringer, B, Block, F, Bobien, S, Bornschein, B, Bornschein, L, Böttcher, M, Brunst, T, Caldwell, TS, Chilingaryan, S, Choi, W, Debowski, K, Descher, M, Barrero, D Díaz, Doe, PJ, Dragoun, O, Drexlin, G, Edzards, F, Eitel, K, Ellinger, E, Engel, R, Enomoto, S, Felden, A, Formaggio, JA, Fränkle, FM, Franklin, GB, Friedel, F, Fulst, A, Gauda, K, Gavin, AS, Gil, W, Glück, F, Grössle, R, Gumbsheimer, R, Hannen, V, Haußmann, N, Helbing, K, Hickford, S, Hiller, R, Hillesheimer, D, Hinz, D, Höhn, T, Houdy, T, Huber, A, Jansen, A, Karl, C, Kellerer, J, Kleifges, M, Klein, M, Köhler, C, Köllenberger, L, Kopmann, A, Korzeczek, M, Kovalík, A, Krasch, B, Krause, H, La Cascio, L, Lasserre, T, Le, TL, Lebeda, O, Lehnert, B, Lokhov, A, Machatschek, M, Malcherek, E, Mark, M, Marsteller, A, Martin, EL, Melzer, C, Mertens, S, Mostafa, J, Müller, K, Neumann, H, Niemes, S, Oelpmann, P, Parno, DS, Poon, AWP, Poyato, JML, Priester, F, Ráliš, J, Ramachandran, S, Robertson, RGH, Rodejohann, W, Rodenbeck, C, Röllig, M, Röttele, C, Ryšavý, M, Sack, R, Saenz, A, Salomon, R, Schäfer, P, Schimpf, L, Schlösser, M, Schlösser, K, Schlüter, L, and Schneidewind, S
- Subjects
Nuclear and Plasma Physics ,Particle and High Energy Physics ,Physical Sciences ,Atomic ,Molecular ,Nuclear ,Particle and Plasma Physics ,Quantum Physics ,Nuclear & Particles Physics ,Astronomical sciences ,Atomic ,molecular and optical physics ,Particle and high energy physics - Abstract
In this work we present a keV-scale sterile-neutrino search with a low-tritium-activity data set of the KATRIN experiment, acquired in a commissioning run in 2018. KATRIN performs a spectroscopic measurement of the tritium β -decay spectrum with the main goal of directly determining the effective electron anti-neutrino mass. During this commissioning phase a lower tritium activity facilitated the measurement of a wider part of the tritium spectrum and thus the search for sterile neutrinos with a mass of up to 1.6keV . We do not find a signal and set an exclusion limit on the sterile-to-active mixing amplitude of sin 2θ< 5 × 10 - 4 (95 % C.L.) at a mass of 0.3 keV. This result improves current laboratory-based bounds in the sterile-neutrino mass range between 0.1 and 1.0 keV.
- Published
- 2023