Aachen 2019 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 56: Neutrino-Detektoren II

T 56.9: Vortrag

Mittwoch, 27. März 2019, 18:00–18:15, S07

Data reduction and analysis of the ¹⁶³Ho spectrum for the ECHo experiment — •Clemens Velte¹, Arnulf Barth¹, Martin Brass³, Sergey Eliseev⁴, Loredana Gastaldo¹, Federica Mantegazzini¹, Benjamin Raach¹, Andreas Reifenberger¹, and Alexander Ziegenbein² for the ECHo collaboration — ¹Kirchhoff Institute for Physics, Heidelberg University — ²Physikalisches Institut, Tuebingen University — ³Institute for theoretical physics, Heidelberg University — ⁴MPI for Nuclear physics, Heidelberg University

The ECHo experiment has been conceived for the determination of the effective electron neutrino mass. High statistics and high energy resolution spectra will be acquired using large arrays with in total about 10000 metallic magnetic calorimeters with enclosed high purity ¹⁶³Ho source. The reliability of the high statistics ¹⁶³Ho spectrum resides in an accurate analysis protocol to be applied to single pixel data sets. This analysis protocol has been first tested for the reduction of acquired data obtained by reading out 24 pixels over 3 weeks. We describe the quality check and calibration each file needs to pass for adding the corresponding data to the final spectrum. This is based on the analysis of key parameters, as energy resolution and background level. Furthermore we present the analysis structure for the high statistics spectrum to extract spectral shape parameters, background contributions, Q_EC-value and determine the effective electron neutrino mass evidence. Preliminary results obtained with the analysis of a selected data set will be discussed.