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Mass difference measurements help to determine the neutrino mass

The Q-value of electron capture in 163Ho has been determined with an uncertainty of 0.6 eV c–2 through a combination of high-precision Penning-trap mass spectrometry and precise atomic physics calculations. This high-precision measurement provides insight into systematic errors in neutrino mass measurements.

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Fig. 1: Comparison of indirect and direct measurements of the Q-value of 163Ho electron capture.

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This is a summary of: Schweiger, C. et al. Penning-trap measurement of the Q value of electron capture in 163Ho for the determination of the electron neutrino mass. Nat. Phys. https://doi.org/10.1038/s41567-024-02461-9 (2024).

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Mass difference measurements help to determine the neutrino mass. Nat. Phys. 20, 901–902 (2024). https://doi.org/10.1038/s41567-024-02463-7

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