Update: Neutrino mass measurements with KATRIN
ORAL
Abstract
The Karlsruhe Tritium Neutrino (KATRIN) experiment probes the electron neutrino mass with beta decays, reaching an ultimate sensitivity of 0.2 eV (90% CL). KATRIN performs high-precision spectroscopy of $\beta$-electrons near the tritium endpoint at 18.6 keV by employing a windowless gaseous tritium source and an electrostatic spectrometer based on the MAC-E filter principle. This approach allows a model-independent measurement of the neutrino mass and is complementary to model-dependent measurements with cosmology and neutrinoless double beta decay. The required sensitivity demands high stability of hardware components, precise understanding of systematic effects, and low background. The commissioning of the system was completed in 2019 followed by the first data release. KATRIN accumulated more data in 2020 and investigates different operating modes to further enhance sensitivity. This talk will give an overview of the current status and the latest results.
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Authors
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Bjoern Lehnert
Berkeley Lab