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Würzburg 2018 – scientific programme

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T: Fachverband Teilchenphysik

T 31: Neutrinophysik VI

T 31.10: Talk

Tuesday, March 20, 2018, 18:45–19:00, Z6 - HS 0.001

Determination of the tritium Q-value at the KATRIN Experiment — •Rudolf Sack — Westfälische Wilhelms-Universität

The Karlsruhe Tritium Neutrino (KATRIN) experiment is a next Generation tritium β-decay experiment which will allow a model independent investigation of the sub eV neutrino mass scale. With an estimated sensitivity of 0.2 eV/c2 (90% C.L.) it will improve the sensitivity of direct neutrino mass measurements by one order of magnitude. To reach this goal, it is important to understand the systematic uncertainties of this experiment. The measurement of the Q-value of tritium β-decay at KATRIN, which is closely related to the endpoint E0 of the electron energy spectrum, can be compared to results of Penning trap experiments, by the group of EG Meyers et al., who published this value with an uncertainty of only 70   meV. This will allow us to check the systematics of the experiment, assuming that we can control our energy scale at this level. The estimated statistical error will be Δ E0 = 2 − 3   meV after an effective three years of measurement time.
This work was supported by the DFG Graduate School 2149.

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