Heidelberg 2022 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 20: Neutrino Physics without Accelerators 1

T 20.8: Vortrag

Montag, 21. März 2022, 18:10–18:25, T-H33

Search for the DSNB in JUNO: Development of new Methods for Background Event Identification — •Matthias Mayer1, Lothar Oberauer1, Raphael Stock1, Hans Steiger2, Konstantin Schweizer1, Ulrike Fahrendholz1, David Dörflinger1, Sebastian Zwickel1, Simon Appel1, Carsten Dittrich1, Vincent Rompel1, Luca Schweizer1, Korbinian Stangler1, and Simon Csakli1 for the JUNO collaboration — 1Technische Universität München, München, Germany — 2Institute of Physics and EC PRISMA+, Johannes Gutenberg Universität Mainz, Mainz, Germany

The diffuse supernova neutrino background (DSNB) is a constant, diffuse flux of relic neutrinos from past core-collapse supernovae over the entire visible universe. The upcoming Jiangmen Underground Neutrino Observatory (JUNO), a 20 kton liquid scintillator detector, expects to observe the DSNB through the inverse beta decay (IBD) detection channel. Besides IBD background from other electron anti-neutrino sources, there are also neutron-induced background events and NC interactions of atmospheric neutrinos of all flavours. This non-IBD background can be discriminated using pulse shape discrimination (PSD) methods. In this talk, I investigate the possibility to increase the fiducial volume available for the DSNB search using machine learning methods. Further, this talk discusses the effects of an electronics simulation and the flourescence parameter choice on the achievable PSD performance. This work is supported by the DFG research unit "JUNO", the DFG collaborative research centre 1258 "NDM", and the DFG Cluster of Excellence "Origins".

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