Göttingen 2025 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 101: Neutrino Physics VIII
T 101.4: Vortrag
Freitag, 4. April 2025, 09:45–10:00, VG 3.103
Sensitivity studies for a next-generation neutrino-mass experiment using tritium β-decay — •Svenja Heyns for the KATRIN collaboration — Karlsruhe Institute of Technology, Germany
The Karlsruhe Tritium Neutrino (KATRIN) experiment probes the absolute neutrino mass scale by precision spectroscopy of tritium β-decay. With a total of 1000 days of measurement by the end of 2025, a final sensitivity better than 300 meV/c2 (90% C.L.) is anticipated by the collaboration.
Taking next steps in enhancing the sensitivity, for instance towards the regime of inverted mass ordering, requires novel technological approaches to significantly improve statistics, energy resolution, and background suppression. We explore two key strategies: (1)implementing a differential detector with sub-eV energy resolution (quantum sensor detector array, time-of-flight measurement) to resolve each electron’s energy individually while covering the entire energy interval of interest simultaneously and (2)exploring a large-volume atomic tritium source. In this presentation, we introduce the conceptual framework for simulations to investigate the requirements by technology and limits by physics to confine the achievable sensitivity on the neutrino mass with a differential measurement. This work is supported by the Helmholtz Association, the Ministry for Education and Research BMBF (05A17PM3, 05A17PX3, 05A17VK2, and 05A17WO3), the Helmholtz Alliance for Astroparticle Physics (HAP), and the Helmholtz Initiative and Networking Fund (W2/W3-118).
Keywords: Neutrino; R&D future experiments; R&D detector technology; Neutrino mass