Bonn 2020 – scientific programme
The DPG Spring Meeting in Bonn had to be cancelled! Read more ...
Parts | Days | Selection | Search | Updates | Downloads | Help
T: Fachverband Teilchenphysik
T 56: Experimental methods III
T 56.7: Talk
Wednesday, April 1, 2020, 18:00–18:15, H-ÜR 1
Accuracy and performance of Geant4 in background simulations for rare event searches — •Holger Kluck1,2, Robert Breier3, Alexander Fuß1,2, Valentyna Mokina2, Veronika Palušová3, and Pavel Povinec3 — 1Atominstitut, Technische Universität Wien, A-1020 Wien, Austria — 2Institut für Hochenergiephysik der Österreichischen Akademie der Wissenschaften, A-1050 Wien, Austria — 3Comenius University, Faculty of Mathematics, Physics and Informatics, 84248 Bratislava, Slovakia
Searches for rare events depend crucially on an accurate prediction of the background. Depending on the type of search, the energies of interest go from the MeV regime, e.g. for neutrinoless double-beta (0ν2β) decay, down to the sub-keV regime, e.g. for coherent elastic neutrino-nucleus scattering (CEνNS) and dark matter-nucleus scattering. A widespread Monte Carlo code to model the background is Geant4. It gives its users great freedom of configuration, i.a. by choosing the actual model for the particle interactions, the so-called physics list, and by setting the production threshold for secondary particles.
In this contribution, we assess the dependency of the obtained background spectra on the chosen Geant4 configuration for radioactive decays in Ge and CaWO4 targets. First, a potential most accurate reference configuration is infered based on literature research. Afterwards we systematically scan the configuration space and compare the simulated spectra with the reference both in the MeV and in the sub-keV regime. Lastly, for configurations with a similar accuracy as the reference, we identify the one with the highest performance.