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Publication Details
AFRICAN RESEARCH NEXUS
SHINING A SPOTLIGHT ON AFRICAN RESEARCH
physics and astronomy
Direct neutrino-mass measurement with sub-electronvolt sensitivity
Nature Physics, Volume 18, No. 2, Year 2022
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Description
Since the discovery of neutrino oscillations, we know that neutrinos have non-zero mass. However, the absolute neutrino-mass scale remains unknown. Here we report the upper limits on effective electron anti-neutrino mass, mν, from the second physics run of the Karlsruhe Tritium Neutrino experiment. In this experiment, mν is probed via a high-precision measurement of the tritium β-decay spectrum close to its endpoint. This method is independent of any cosmological model and does not rely on assumptions whether the neutrino is a Dirac or Majorana particle. By increasing the source activity and reducing the background with respect to the first physics campaign, we reached a sensitivity on mν of 0.7 eV c–2 at a 90% confidence level (CL). The best fit to the spectral data yields mν2 = (0.26 ± 0.34) eV2 c–4, resulting in an upper limit of mν < 0.9 eV c–2 at 90% CL. By combining this result with the first neutrino-mass campaign, we find an upper limit of mν < 0.8 eV c–2 at 90% CL. © 2022, The Author(s).
Authors & Co-Authors
Aker, Max
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Beglarian, Armen
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Behrens, Jan D.
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Germany, Karlsruhe
Karlsruher Institut Für Technologie
Berlev, Anatoliy I.
Russian Federation, Moscow
Institute for Nuclear Research of the Russian Academy of Sciences
Besserer, Uwe
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Bieringer, Benedikt
Germany, Munster
University of Münster
Block, Fabian
Germany, Karlsruhe
Karlsruher Institut Für Technologie
Bobien, Steffen
Russian Federation, Moscow
Alikhanov Institute for Theoretical and Experimental Physics
Böttcher, Matthias
Germany, Munster
University of Münster
Bornschein, Lutz
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Brunst, Tim
Germany, Munich
Technische Universität München
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Caldwell, Thomas S.
United States, Chapel Hill
The University of North Carolina at Chapel Hill
United States, Durham
Triangle Universities Nuclear Laboratory
Chilingaryan, Suren A.
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Choi, Wonqook Q.
Germany, Karlsruhe
Karlsruher Institut Für Technologie
Debowski, Karol
Germany, Wuppertal
Bergische Universität Wuppertal
Deffert, Marco
Germany, Karlsruhe
Karlsruher Institut Für Technologie
Descher, Martin
Germany, Karlsruhe
Karlsruher Institut Für Technologie
Díaz Barrero, Deseada D.
Spain, Madrid
Universidad Autónoma de Madrid
Doe, Peter J.
United States, Seattle
University of Washington
Dragoun, Otokar
Czech Republic, Prague
Academy of Sciences of the Czech Republic
Drexlin, Guido J.
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Germany, Karlsruhe
Karlsruher Institut Für Technologie
Eitel, Klaus F. X.
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Ellinger, Enrico
Germany, Wuppertal
Bergische Universität Wuppertal
Engel, Ralph
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Germany, Karlsruhe
Karlsruher Institut Für Technologie
Enomoto, Sanshiro
United States, Seattle
University of Washington
Felden, Arne
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Formaggio, Joseph A.
United States, Cambridge
Massachusetts Institute of Technology
Fraenkle, Florian M.
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Franklin, Gregg B.
United States, Pittsburgh
Carnegie Mellon University
Friedel, Fabian
Germany, Karlsruhe
Karlsruher Institut Für Technologie
Fulst, Alexander
Germany, Munster
University of Münster
Gauda, Kevin
Germany, Munster
University of Münster
Gil, Woosik
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Glück, Ference
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Größle, Robin
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Gumbsheimer, Rainer
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Höhn, Thomas
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Hannen, Volker Michael
Germany, Munster
University of Münster
Haussmann, Norman
Germany, Wuppertal
Bergische Universität Wuppertal
Helbing, Klaus
Germany, Wuppertal
Bergische Universität Wuppertal
Hickford, Stephanie
Germany, Karlsruhe
Karlsruher Institut Für Technologie
Hiller, Roman
Germany, Karlsruhe
Karlsruher Institut Für Technologie
Hillesheimer, David
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Hinz, Dominic
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Houdy, Thibaut
Germany, Munich
Technische Universität München
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Huber, Anton
Germany, Karlsruhe
Karlsruher Institut Für Technologie
Jansen, Alexander
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Karl, Christian
Germany, Munich
Technische Universität München
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Kellerer, Jonas
Germany, Karlsruhe
Karlsruher Institut Für Technologie
Kleifges, Matthias
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Kopmann, Andreas
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Lasserre, Thierry
France, Gif-sur-yvette
Cea Saclay
Martin, Eric L.
United States, Chapel Hill
The University of North Carolina at Chapel Hill
United States, Durham
Triangle Universities Nuclear Laboratory
Mertens, Susanne
Germany, Munich
Technische Universität München
Germany, Munich
Max Planck Institute for Physics Werner Heisenberg Institute
Parno, Diana S.
United States, Pittsburgh
Carnegie Mellon University
Spanier, Felix
Germany, Heidelberg
Universität Heidelberg
Steidl, Markus
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Tcherniakhovski, Denis
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Telle, Helmut H.
Spain, Madrid
Universidad Autónoma de Madrid
Thümmler, Thomas
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Tkachev, Igor I.
Russian Federation, Moscow
Institute for Nuclear Research of the Russian Academy of Sciences
Valerius, Kathrin
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Germany, Karlsruhe
Karlsruher Institut Für Technologie
Weinheimer, Christian
Germany, Munster
University of Münster
Wolf, Joachim
Germany, Karlsruhe
Karlsruher Institut Für Technologie
Wüstling, Sascha
Germany, Eggenstein-leopoldshafen
Karlsruher Institut Für Technologie, Campus Nord
Yen, Yungruey
United States, Pittsburgh
Carnegie Mellon University
Statistics
Citations: 168
Authors: 66
Affiliations: 20
Identifiers
Doi:
10.1038/s41567-021-01463-1
ISSN:
17452473
Study Approach
Quantitative