Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 49: Neutrino Physics without Accelerators 4

T 49.1: Gruppenbericht

Dienstag, 22. März 2022, 16:15–16:35, T-H34

Direct neutrino mass measurement with the Project 8 experiment: status and outlook — •Larisa Thorne and Martin Fertl for the Project 8 collaboration — Institute of Physics and Excellence Cluster PRISMA+, Johannes Gutenberg University Mainz, 55099 Mainz, Germany

There have been significant gains in characterizing neutrino properties in recent decades, however the absolute neutrino mass scale continues to be elusive. The Project 8 experiment seeks to probe this quantity directly via kinematic analysis of atomic tritium single beta decay, using the novel CRES (cyclotron radiation emission spectroscopy) technique. CRES employs a frequency-based approach to measure the differential tritium beta decay spectrum in the endpoint region, where the spectral shape is most sensitive to distortions from a non-zero neutrino mass. Here we present a roadmap of Project 8's milestones towards a neutrino mass measurement with a final design sensitivity of 40 meV. This includes recent results from a successful first-time demonstration of the CRES technique with molecular tritium, as well as status updates on the components comprising the experiment's future full-scale version.