Conference on Science at the Sanford Underground Research Facility

New results on Neutrino Mass from the KATRIN Experiment

May 11, 2022, 2:25 PM

20m

EEP 253 (SD Mines)

Oral Neutrino Oscillations Neutrino Oscillations - Parallel

Speaker

Xu Weiran for the KATRIN Collaboration (MIT)

Description

The Karlsruhe Tritium Neutrino (KATRIN) experiment has pushed the measurement of absolute neutrino mass scale down to the sub-eV region for the first time. The $\beta$ electrons from molecular tritium decay are measured with high precision, using the magnetic adiabatic collimation with an electrostatic filter (MAC-E filter). A blind analysis for the first two scientific campaigns of KATRIN sets the most stringent upper limit of $m_{\nu }$ < 0.8eV/c${}^2$ at a 90% confidence level. This new result of a direct neutrino mass measurements provides a key input to cosmological models and the theory of particle physics.

Presentation materials

KATRIN_CoSSURF.pdf