Search for keV-scale Sterile Neutrinos with first KATRIN Data
- 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, T.S.
- Carney, R.M.D.
- Chilingaryan, S.
- Choi, W.
- Debowski, K.
- Descher, M.
- Barrero, D. Díaz
- Doe, P.J.
- Dragoun, O.
- Drexlin, G.
- Edzards, F.
- Eitel, K.
- Ellinger, E.
- Engel, R.
- Enomoto, S.
- Felden, A.
- Formaggio, J.A.
- Fränkle, F.M.
- Franklin, G.B.
- Friedel, F.
- Fulst, A.
- Gauda, K.
- Gavin, A.S.
- 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, T.L.
- Lebeda, O.
- Lehnert, B.
- Lokhov, A.
- Machatschek, M.
- Malcherek, E.
- Mark, M.
- Marsteller, A.
- Martin, E.L.
- Melzer, C.
- Mertens, S.
- Mostafa, J.
- Müller, K.
- Neumann, H.
- Niemes, S.
- Oelpmann, P.
- Parno, D.S.
- Poon, A.W.P.
- Poyato, J.M.L.
- Priester, F.
- Ráliš, J.
- Ramachandran, S.
- Robertson, R.G.H.
- 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.
- Schrank, M.
- Schwemmer, A.
- Šefčík, M.
- Sibille, V.
- Siegmann, D.
- Slezák, M.
- Spanier, F.
- Steidl, M.
- Sturm, M.
- Telle, H.H.
- Thorne, L.A.
- Thümmler, T.
- Titov, N.
- Tkachev, I.
- Urban, K.
- Valerius, K.
- Vénos, D.
- Vizcaya Hernández, A.P.
- Weinheimer, C.
- Welte, S.
- Wendel, J.
- Wetter, M.
- Wiesinger, C.
- Wilkerson, J.F.
- Wolf, J.
- Wüstling, S.
- Wydra, J.
- Xu, W.
- Zadoroghny, S.
- Zeller, G.
DOIAbstract
International audienceIn this work we present a keV-scale sterile-neutrino search with the first tritium data of the KATRIN experiment, acquired in the commissioning run in 2018. KATRIN performs a spectroscopic measurement of the tritium $\beta$-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 search for sterile neutrinos with a mass of up to $1.6\, \mathrm{keV}$. We do not find a signal and set an exclusion limit on the sterile-to-active mixing amplitude of down to $\sin^2\theta < 5\cdot10^{-4}$ ($95\,\%$ C.L.), improving current laboratory-based bounds in the sterile-neutrino mass range between 0.1 and $1.0\, \mathr...
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