Dortmund 2021 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 68: Neutrino physics without accelerators III

T 68.3: Vortrag

Mittwoch, 17. März 2021, 16:35–16:50, Tr

The cosmic muon induced background in LEGEND-1000 — •Moritz Neuberger, Luigi Pertoldi, Stefan Schönert, and Chrstoph Wiesinger — Physik-Department, Technische Universität München, Garching

In-situ production of long-lived isotopes by cosmic muon interactions may generate a non-negligible background for deep underground rare event searches. Depending on the depth, this might limit the sensitivity of next generation experiments, if no additional background identification techniques are implemented. One of those experiments is the LEGEND-1000 experiment (Large Enriched Germanium Experiment for Neutrinoless double beta Decay). Previous Monte Carlo studies identified the delayed decay of 77(m)Ge as dominant cosmogenic background in the search for neutrinoless double beta decay of 76Ge [1]. Studies of this depth-dependent background, with special focus on the current LEGEND-200 site are carried out. Various background mitigation strategies, including different geometries, xenon doping and active rejection cuts are under study to increase the virtual depth.

[1] C. Wiesinger et al., Eur.Phys.J.C 78 (2018) 7, 597

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