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T: Fachverband Teilchenphysik

T 92: Neutrino astronomy IV

T 92.1: Vortrag

Donnerstag, 18. März 2021, 16:00–16:15, Tq

Search for the DSNB in JUNO: Development of new Methods for Background Event Identification — •Matthias Mayer¹, Lothar Oberauer¹, Raphael Stock¹, Hans Steiger², Julia Sawatzki¹, Konstantin Schweizer¹, Ulrike Fahrendholz¹, David Dörflinger¹, Sebastian Zwickel¹, and Ludwig Wallner¹ for the JUNO collaboration — ¹Physik-Department, TU München, James-Frank-Str. 1, 85748 Garching b. München, Deutschland — ²PRISMA⁺ Cluster of Excellence, Staudingerweg 9, 55128 Mainz, Deutschland

The diffuse supernova neutrino background (DSNB) describes the total relic neutrino flux from past core-collapse supernovae over the entire visible universe. It is expected to be observable at the Jiangmen Underground Neutrino Observatory (JUNO), a 20 kton liquid scintillator detector currently in construction near Jiangmen, China. The detection channel to measure the DSNB signal at JUNO is the inverse beta decay (IBD). Besides irreducible background sources to the DSNB signal in the form of IBD events caused either by atmospheric or reactor electron anti-neutrinos, there are non-IBD background events. Those events can be discriminated applying the method of pulse shape discrimination (PSD). In this talk, I discuss the identification of neutron-induced background events and reactions due to atmospheric neutrinos of all flavours. This talk investigates how different PSD techniques can be used to discriminate IBD signal events against these two non-IBD event sources. This work is supported by the DFG within the project MO3 of the SFB1258.