Würzburg 2018 – wissenschaftliches Programm
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T: Fachverband Teilchenphysik
T 31: Neutrinophysik VI
T 31.10: Vortrag
Dienstag, 20. März 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.