Kinematic approaches offer a unique possibility to directly assess the absolute neutrino mass scale in an almost model-independent way.
The Karlsruhe Tritium Neutrino Experiment (KATRIN) aims to measure the electron anti-neutrino mass via precision spectroscopy of the kinetic energy spectrum of tritium beta-decay. For that purpose a high intensity windowless gaseous tritium source is used in conjunction with a high-resolution spectrometer applying the magnetic adiabatic collimation (MAC-E filter) technique to scan the beta-decay spectrum close to its endpoint. The experiment aims for a neutrino mass sensitivity of 0.2 eV/c² at 90% C.L.
The first two KATRIN measurement campaigns led to the first sub-eV mass limit from a direct neutrino-mass experiment. This talk will
present the working principle of KATRIN and the very recently published results of the second measurement campaign.
The work of the speaker is supported by BMBF under contract number 05A20PMA and Deutsche Forschungsgemeinschaft DFG (Research Training Group GRK 2149) in Germany.
Join from PC, Mac, Linux, iOS or Android: https://stanford.zoom.us/j/98973156241?pwd=cEU5RFdlVXoyc0JTeTlDMkozKzQ5UT09
Andrew Bradshaw, Sander Breur
(bradshaw@slac, sanderb@slac)