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Conference Paper

First neutrino mass measurement with the KATRIN experiment

MPS-Authors

The KATRIN Collaboration, 
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Schlüter,  Lisa
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

Lasserre,  Thierry
Max Planck Institute for Physics, Max Planck Society and Cooperation Partners;

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Citation

The KATRIN Collaboration, Schlüter, L., & Lasserre, T. (2020). First neutrino mass measurement with the KATRIN experiment. Journal of Physics: Conference Series, 1468, 012180.


Cite as: https://hdl.handle.net/21.11116/0000-0008-1B85-4
Abstract
The KATRIN (Karlsruhe Tritium Neutrino) experiment is designed to determine the effective mass of the electron anti-neutrino with an unprecedented sensitivity of 0.2 eV/c2 (90% C.L.) in a direct and model-independent way. Tritium β-decay electrons, emitted in a high-luminosity molecular source, are analyzed with a MAC-E filter. The effective electron anti-neutrino mass squared is inferred from a fit to the integral spectrum in an energy window close the tritium endpoint. In this work, we report on the analysis of the first four-week science run of KATRIN in spring 2019. Considering statistical and systematic uncertainties, we find a central value of the effective electron anti-neutrino mass of ${m}_{v}^{2}=(-{1.0}_{-1.0}^{+0.9}){\text{eV}}^{2}$. Following the method of Lokhov and Tkachov, we derive an upper limit of 1.1 eV at 90% C.L. on the absolute neutrino mass scale.