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T: Fachverband Teilchenphysik
T 22: Neutrino Physics II
T 22.3: Vortrag
Dienstag, 17. März 2026, 16:45–17:00, AudiMax
LEGEND-1000: Quasi Background-Free Search for Neutrinoless Double Beta Decay in 76Ge at the Ton-Scale — •Lorenz Gessler for the LEGEND collaboration — Eberhard Karls Universität, Tübingen, Germany
In pursuit of the observation of the first lepton-number violating process, the LEGEND collaboration is progressing towards a next-generation detector – LEGEND1000. The search for the neutrinoless double beta decay of 76Ge probes the Majorana nature of neutrinos as well as the absolute neutrino mass scale, directly accessing physics beyond the Standard Model. Lessons learned from GERDA, MAJORANA Demonstrator and LEGEND200 allow us to further improve background mitigation strategies and to bring state-of-the-art high-purity germanium detector technology to the ton-scale, enabling a quasi background-free regime at the design exposure. This will allow LEGEND1000 to probe the entire effective Majorana mass range of the inverted ordering, corresponding to a half-life sensitivity exceeding 1028 yr. This overview talk summarizes the current status of LEGEND1000 and highlights recent progress in the experimental design, background rejection strategy, and overall detector concept.
We acknowledge support from the DFG under Germany’s Excellence Strategy – EXC 2094 (ORIGINS) and through the Sonderforschungsbereich SFB 1258. We acknowledge support by the BMFTR Verbundprojekt 05A2023 (LEGEND).
Keywords: LEGEND; Neutrinoless Double Beta Decay