Erlangen 2026 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 2: Neutrino Physics I

T 2.6: Vortrag

Montag, 16. März 2026, 17:30–17:45, AudiMax

Current status of the next-generation neutrino mass experiment Project 8 — •Rene Reimann for the Project 8 collaboration — Johannes Gutenberg Universität Mainz

The Project 8 experiment aims to probe the absolute neutrino mass through direct kinematic measurements of the tritium beta decay spectrum using cyclotron radiation emission spectroscopy (CRES). Future tritium beta decay experiments that aim for neutrino mass sensitivities below ∼200meV, must be operated with atomic tritium to avoid effects from rotational and vibrational final states of the daughter nucleus. The CRES technique has been demonstrated successfully with molecular tritium in a small cylindrical wave guide. For a competitive experiment, the CRES technique must be scaled up and be operated in combination with atomic tritium. Currently the CRES cavity apparatus is under commissioning, which will demonstrate the CRES technique with improved energy resolution within a cavity using an event-by-event reconstruction. The low-frequency apparatus is currently in its design phase and should demonstrate the coexistence of CRES electron detection and an atomic trap while increasing the effective volume and lowering the background magnetic field compared to previous CRES experiments. In addition, atomic tritium sources at unprecedent fluxes are under development. In this contribution, I give a short overview of the current demonstrators, which pave the way to a full-scale neutrino mass experiment.

Keywords: Neutrino Mass; Atomic Tritium; Cyclotron Radiation Emission Spectroscopy