학술논문
Search for keV-scale sterile neutrinos with the first KATRIN data
Document Type
article
Author
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; Schneidewind, S
Source
European Physical Journal C. 83(8)
Subject
Language
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.