Direct neutrino-mass measurement with sub-electronvolt sensitivity

Aker, M.; Beglarian, A.; Behrens, J.; Berlev, A.; Besserer, U.; Bieringer, B.; Block, F.; Bobien, S.; Böttcher, M.; Bornschein, B.; Bornschein, L.; Brunst, T.; Caldwell, T. S.; Carney, R. M. D.; Cascio, L. La; Chilingaryan, S.; Choi, W.; Debowski, K.; Deffert, M.; Descher, M.; Barrero, D. Díaz; Doe, P. J.; Dragoun, O.; Drexlin, G.; Eitel, K.; Ellinger, E.; Engel, R.; Enomoto, Seishi; Felden, A.; Formaggio, J. A.; Fränkle, F. M.; Franklin, G.; Friedel, F.; Fulst, A.; Gauda, K.; Gil, W.; Glück, F.; Größle, Robin; Gumbsheimer, R.; Gupta, V.; Höhn, T.; Hannen, V.; Haußmann, N.; Helbing, K.; Hickford, S.; Hiller, R.; Hillesheimer, D.; Hinz, D.; Houdy, T.; Huber, A.; Jansen, A.; Karl, C.; Kellerer, F.; Kellerer, J.; Kleifges, M.; Klein, M.; Köhler, C.; Köllenberger, L.; Kopmann, A.; Korzeczek, M.; Kovalík, A.; Krasch, B.; Krause, H.; Lago, Bruno L.; Lasserre, T.; Le, T. L.; Lebeda, O.; Lehnert, B.; Lokhov, A.; Machatschek, M.; Malcherek, E.; Mark, Martin; Marsteller, A.; Martín, E. L.; Melzer, C.; Menshikov, A.; 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.; Ramachandran, S.; Robertson, R. G. H.; Rodejohann, Werner; Röllig, M.; Röttele, C.; Rodenbeck, C.; Ryšavý, M.; Sack, R.; Sáenz, Alejandro; Schäfer, P.; Pollithy, A.; Schimpf, L.; Schlösser, K.; Schlösser, Magnus; Schlüter, L.; Schneidewind, S.; Schrank, M.; Schulz, B.; Schwemmer, A.; Šefčík, M.; Sibille, V.; Siegmann, D.; Slezák, M.; Spanier, F.; Steidl, M.; Sturm, M.; Sun, M.; Tcherniakhovski, D.; Telle, Helmut H.; Thorne, L. A.; Thümmler, T.; Titov, N.; Tkachev, I.; Urban, K.; Valerius, K.; Vénos, D.; Hernández, A. P. Vizcaya; Weinheimer, C.; Welte, S.; Wendel, J.; Wilkerson, J. F.; Wolf, J.; Wüstling, S.; Wydra, J.; Xu, W.; Yen, Y.-R.; Zadoroghny, S.; Zeller, G.

doi:10.1038/s41567-021-01463-1

articleNature PhysicsFeb 1, 2022HYBRID OA

Direct neutrino-mass measurement with sub-electronvolt sensitivity

MAM. Aker ABA. Beglarian JBJ. Behrens ABA. Berlev UBU. Besserer

Karlsruhe Institute of Technology · FIZ Karlsruhe – Leibniz Institute for Information Infrastructure · +26 more institutions

Indexed inarxivcrossrefdatacite

Abstract

Abstract 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, m ν , from the second physics run of the Karlsruhe Tritium Neutrino experiment. In this experiment, m ν 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 m ν of 0.7…

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Keywords

Physics
Neutrino
Sensitivity (control systems)
Particle physics
Nuclear physics
Neutrino oscillation

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