SMuK 2023 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 39: Neutrinos, Dark Matter VI

T 39.1: Vortrag

Dienstag, 21. März 2023, 17:00–17:15, POT/0006

Constraining the ^77(m)Ge Production with GERDA Data and Implications for LEGEND-1000 — •Moritz Neuberger¹, Luigi Pertoldi¹, Stefan Schönert¹, and Christoph Wiesinger² for the GERDA collaboration — ¹Physik-Department E15, Technische Universität München — ²Physik-Department E47, Technische Universität München

The delayed decay of ^77(m)Ge, produced by neutron capture on ⁷⁶Ge, is a potential background for the next-generation neutrinoless double-beta decay experiment LEGEND-1000 at the LNGS site. Based on Monte Carlo simulations, various mitigation strategies and suppression techniques have been proposed to identify and suppress this background [1,2,3]. In this talk, we will present the results to search for ^77(m)Ge by exploiting the isomeric state in ⁷⁷As. Given the very similar configuration - bare germanium detectors in liquid argon - it serves as a benchmark for our LEGEND-1000 predictions. This research was supported by the BMBF through the Verbundforschung 05A20WO2 and by the DFG through the SFB1258 and Excellence Cluster ORIGINS.

[1] C. Wiesinger et al., Eur. Phys. J. C (2018) 78: 597 [2] LEGEND-1000 pCDR, arXiv 2107.11462 [3] M. Neuberger et al., 2021 J. Phys.: Conf. Ser. 2156 012216