SMuK 2023 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 13: Neutrinos I
T 13.4: Vortrag
Montag, 20. März 2023, 17:15–17:30, POT/0251
Combined analysis of the first five KATRIN measurement campaigns with KaFit — •Stephanie Hickford1, Leonard Köllenberger1, and Weiran Xu2 for the KATRIN collaboration — 1Institute for Astroparticle Physics, Karlsruhe Institute of Technology — 2Massachusetts Institute of Technology
The KATRIN collaboration aims to determine the neutrino mass with a sensitivity of 0.2 eV/c2 (90 % CL). This will be achieved by measuring the endpoint region of the tritium β-electron spectrum. Combined analysis of the first two KATRIN measurement campaigns yielded a neutrino mass limit of mν ≤ 0.8 eV (90 % CL).
Analyses of data from the first five measurements campaigns are currently underway. One of the combined analyses is performed using the KaFit/SSC model within the KASPER software framework. In this analysis systematic uncertainties are propagated as additional fit parameters with constraints (the “pull term” method). An overview of the collected data and the expected combined sensitivity on the neutrino mass from these five measurement campaigns will be presented in this talk.
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).