Determining the absolute scale of the effective neutrino mass is challenging due to neutrinos' weak interaction. This paper reports a high-precision determination of the Q value for electron capture in $^{163}$Ho using the PENTATRAP Penning-trap experiment. The measured Q value of 2,863.2 ± 0.6 eV c<sup>2</sup> improves upon previous measurements by over 50-fold, enabling sub-electronvolt sensitivity in electron neutrino mass determination from $^{163}$Ho electron capture.
Publisher
Nature Physics
Published On
Jun 14, 2024
Authors
Christoph Schweiger, Martin Braß, Vincent Debierre, Menno Door, Holger Dorrer, Christoph E. Düllmann, Christian Enss, Pavel Filianin, Loredana Gastaldo, Zoltán Harman, Maurits W. Haverkort, Jost Herkenhoff, Paul Indelicato, Christoph H. Keitel, Kathrin Kromer, Daniel Lange, Yuri N. Novikov, Dennis Renisch, Alexander Rischka, Rima X. Schüssler, Sergey Eliseev, Klaus Blaum
Tags
neutrino mass
electron capture
Q value
high-precision measurement
PENTATRAP
sub-electronvolt sensitivity
physics
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