Köln 2025 – wissenschaftliches Programm

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MS: Fachverband Massenspektrometrie

MS 4: Application to Astrophysics

MS 4.1: Hauptvortrag

Dienstag, 11. März 2025, 15:45–16:15, HS 2 Chemie

A big scale to measure the tiniest mass - closing in on the neutrino mass with the KATRIN experiment — •Alexander Marsteller for the KATRIN collaboration — Karlsruher Institut für Technologie, Karlsruhe, Deutschland

The neutrino mass is a fundamental parameter with profound implications for cosmology, shaping structure formation in the universe, and offering a gateway to physics beyond the Standard Model. The kinematics of weak decays provide the only model-independent laboratory approach to determine the absolute neutrino mass scale.

The KArlsruhe TRItium Neutrino experiment (KATRIN) aims to measure the mass of the electron anti-neutrino via high-precision beta-decay spectroscopy of tritium. KATRIN combines a high-luminosity, windowless gaseous molecular tritium source with an electrostatic spectrometer employing magnetic adiabatic collimation. This setup achieves eV-scale energy resolution while maintaining a large accepted solid angle. Since commencing measurements in 2019, KATRIN has achieved stable and precise operation, recently establishing the most stringent direct upper limit of 0.45 eV (90% C.L.) for the neutrino mass.

This presentation will highlight results from the most recent data release and gives an overview of current and future KATRIN activities beyond the neutrino-mass measurement. The talk will conclude with an outlook on KATRIN's remaining path to its 0.3 eV sensitivity goal, and long-term perspectives for pushing neutrino mass measurements in the laboratory by at least another order of magnitude in sensitivity.

Keywords: Neutrino mass; Astroparticle physics; Electron spectroscopy; KATRIN