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T: Fachverband Teilchenphysik
T 43: Poster session Particle Physics
T 43.7: Poster
Dienstag, 31. März 2020, 17:00–18:30, Grotte
Performance of fitting methods for the KATRIN neutrino mass analysis — •Wonqook Choi and Stephanie Hickford for the KATRIN collaboration — Institute for Experimental Particle Physics, Karlsruhe 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. The spectrum is fit to obtain several parameters of interest, including the squared neutrino mass and the effective tritium endpoint.
The fit can be done by combining individual tritium spectral scans and averaging slow control parameters, event count rates, and live time of the KATRIN detector pixels. The data combination impacts the balance between computing complexity and the fit result precision. Sophisticated and computationally expensive methods of combining data can be done without averaging of slow control parameters or over detector pixels.
The data combination and fitting methods are compared by investigating the neutrino mass and endpoint results on Monte Carlo datasets using the KaFit package. The performance of the fit methods in terms of computing time and memory will also be presented.
This work is supported by the Helmholtz Association (HGF), the Ministry for Education and Research BMBF (05A17PM3, 05A17PX3, 05A17VK2, and 05A17WO3), the Helmholtz Alliance for Astroparticle Physics (HAP), and the Helmholtz Young Investigator Group (VH-NG-1055).