EuCAPT Astroneutrino Theory Workshop 2024 in Prague

New upper limits on the neutrino mass, from the KATRIN experiment

Sep 17, 2024, 2:30 PM

1h

Conference center (IEAP CTU in Prague)

New Neutrino Interactions in Laboratory

Speaker

Larisa Thorne (Institut für Physik, Johannes Gutenberg Universität Mainz, Germany)

Description

The KArlsruhe TRItium Neutrino (KATRIN) experiment aims to make a precision measurement of the effective neutrino mass by leveraging the kinematics of tritium beta decay, with a goal neutrino-mass sensitivity of 0.2eV (90% C.L.). To achieve this, the experiment performs an integrating measurement on an ultra-luminous molecular tritium source with a MAC-E filtering spectrometer, with high statistics and well-controlled systematics.

I will report on the newest results from a combined 259 days' worth of data-taking, from which we extract one of the strongest lab-based upper limits on the neutrino mass to date: m_nu < 0.45 eV (90% C.L.)[1]. Additionally, I will outline the next phase of KATRIN and discuss what would be required for next-generation neutrino mass experiments of this kind.

References:

[1] arXiv preprint: https://arxiv.org/abs/2406.13516”.