Dortmund 2021 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 18: Neutrino physics without accelerators I

T 18.4: Vortrag

Montag, 15. März 2021, 16:50–17:05, Tr

Analysis of New KATRIN Neutrino Mass Data using Monte Carlo Propagation — •Christian Karl^1,2, Susanne Mertens^1,2, and Martin Slezák¹ — ¹Max-Planck-Institut für Physik — ²Technische Universität München

The KATRIN experiment is designed to measure the effective electron anti-neutrino mass by investigating the energy spectrum of tritium beta-decay. Here we will focus on the second data taking phase which took place in autumn 2019. For this period, the source activity was set to about 84 % of the nominal value and around 4.2 million electrons were collected in the region of interest. This corresponds to an improval of the statistical uncertainty of about a factor of three compared to the first measurement phase published in 2019.

This talk presents one of the analysis strategies pursued which is based upon Monte Carlo propagation of uncertainties. After briefly describing the model and systematics treatment we will present the sensitivity on MC-data and prospectively also our results on the unblinded data set including an updated confidence interval using the sensitivity limit method of Lokhov and Tkachov.