Bound on 3+1 active-sterile neutrino mixing from the first four-week science run of KATRIN
Creators: name: Aker, M.
name: Altenmueller, K.
name: Beglarian, A.
name: Behrens, J.
name: Berlev, A.
name: Besserer, U.
name: Bieringer, B.
name: Blaum, K.
name: Block, F.
name: Bornschein, B.
name: Bornschein, L.
name: Boettcher, M.
name: Brunst, T.
name: Caldwell, T. S.
name: La Cascio, L.
name: Chilingaryan, S.
name: Choi, W.
name: Barrero, D. Diaz
name: Debowski, K.
name: Deffert, M.
name: Descher, M.
name: Doe, P. J.
name: Dragoun, O.
name: Drexlin, G.
name: Dyba, S.
name: Edzards, F.
name: Eitel, K.
name: Ellinger, E.
name: Engel, R.
name: Enomoto, S.
name: Felden, M. Fedkevych A.
name: Formaggio, J. A.
name: Fraenkle, F. M.
name: Franklin, G. B.
name: Friedel, F.
name: Fulst, A.
name: Gauda, K.
name: Gil, W.
name: Glueck, F.
name: Groessle, R.
name: Gumbsheimer, R.
name: Hoehn, T.
name: Hannen, V.
name: Haussmann, N.
name: Helbing, K.
name: Hickford, S.
name: Hiller, R.
name: Hillesheimer, D.
name: Hinz, D.
name: Houdy, T.
name: Huber, A.
name: Jansen, A.
name: Koellenberger, L.
name: Karl, C.
name: Kellerer, J.
name: Kippenbrock, L.
name: Klein, M.
name: Kopmann, A.
name: Korzeczek, M.
name: Kovalik, A.
name: Krasch, B.
name: Krause, H.
name: Lasserre, T.
name: Le, T. L.
name: Lebeda, O.
name: Guennic, N. Le
name: Lehnert, B.
name: Lokhov, A.
name: Poyato, J. M. Lopez
name: Mueller, K.
name: Machatschek, M.
name: Malcherek, E.
name: Mark, M.
name: Marsteller, A.
name: Martin, E. L.
name: Melzer, C.
name: Mertens, S.
name: Niemes, S.
name: Oelpmann, P.
name: Osipowicz, A.
name: Parno, D. S.
name: Poon, A. W. P.
name: Priester, F.
name: Roellig, M.
name: Roettele, C.
name: Rest, O.
name: Robertson, R. G. H.
name: Rodenbeck, C.
name: Rysavy, M.
name: Sack, R.
name: Saenz, A.
name: Schaller, A.
name: Schaefer, P.
name: Schimpf, L.
name: Schloesser, M.
name: Schloesser, K.
name: Schlueter, L.
name: Schrank, M.
name: Schulz, B.
name: Sefcik, M.
name: Seitz-Moskaliuk, H.
name: Sibille, V.
name: Siegmann, D.
name: Slezak, M.
name: Spanier, F.
name: Steidl, M.
name: Sturm, M.
name: Sun, M.
name: Telle, H. H.
name: Thuemmler, T.
name: Thorne, L. A.
name: Titov, N.
name: Tkachev, I.
name: Trost, N.
name: Venos, D.
name: Valerius, K.
name: Hernandez, A. P. Vizcaya
name: Wuestling, S.
name: Weber, M.
name: Weinheimer, C.
name: Weiss, C.
name: Welte, S.
name: Wendel, J.
name: Wilkerson, J. F.
name: Wolf, J.
name: Xu, W.
name: Yen, Y. -R.
name: Zadoroghny, S.
name: Zeller, G.
Publisher: name: arXiv
Year: 2020
Subjects: subject: High Energy Physics - Experiment (hep-ex)
subject: Nuclear Experiment (nucl-ex)
subject: FOS: Physical sciences
subject: FOS: Physical sciences

description: We report on the light sterile neutrino search from the first four-week science run of the KATRIN experiment in~2019. Beta-decay electrons from a high-purity gaseous molecular tritium source are analyzed by a high-resolution MAC-E filter down to 40 eV below the endpoint at 18.57 keV. We consider the framework with three active neutrinos and one sterile neutrino of mass $m_{4}$. The analysis is sensitive to a fourth mass state $m^2_{4} \lesssim$ 1000 eV$^2$ and to active-to-sterile neutrino mixing down to $|U_{e4}|^2 \gtrsim 2\cdot10^{-2}$. No significant spectral distortion is observed and exclusion bounds on the sterile mass and mixing are reported. These new limits supersede the Mainz results and improve the Troitsk bound for $m^2_{4}
description: 8 pages, 4 figures