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T: Fachverband Teilchenphysik
T 75: Neutrino physics without accelerators VI
T 75.3: Vortrag
Donnerstag, 2. April 2020, 17:05–17:20, H-HS XIII
Results of the First Neutrino Mass Measurement at the KATRIN Experiment — •Martin Slezák for the KATRIN collaboration — Max Planck Institute for Physics, Munich, Germany
The Karlsruhe Tritium Neutrino (KATRIN) experiment aims to search for the effective electron antineutrino mass with a sensitivity of 0.2 eV/c2 (90 % C.L.) from the shape of the tritium β-decay electron energy spectrum.
The first measurement campaign in KATRIN dedicated to the neutrino mass took place in Spring 2019 with about 22 % of the nominal tritium activity. The goal of this pilot measurement was to reach an improved sensitivity compared with the existing results while establishing a robust bias-free analysis and good initial understanding of systematic effects. Different analysis techniques were developed independently to further support the robustness of the result.
This talk presents the high-level analysis of the first neutrino mass data at KATRIN from which an upper limit of 1.1 eV/c2 (90 % C.L.) was derived. The performance of the apparatus will also be discussed in detail. Besides, an overview of the analysis strategies and experimental systematic effects will be given.