Göttingen 2025 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 59: Neutrino Physics V

T 59.5: Vortrag

Mittwoch, 2. April 2025, 17:15–17:30, VG 3.103

Application of the Topological Track Reconstruction to ANNIE — Daniel Bick, Caren Hagner, and •Malte Stender for the ANNIE collaboration — Universität Hamburg, Institut für Experimentalphysik

The Topological Track Reconstruction (TTR) is an algorithm originally developed for reconstructing the energy depostion of muons in liquid scintillator detectors like LENA for improving veto strategies. In its development history, the TTR was successfully used for electron/positron discrimination in JUNO and for separating Cherenkov and scintillation photons in an simulated idealised Water-based liquid scintillator (WbLS) detector. The latter application can be tested on real data in the near future with the help of the Accelerator Neutrino Neutron Interaction Experiment (ANNIE).
ANNIE is a 26-ton water-Cherenkov beam-neutrino detector that - besides neutrino-nucleus cross section and neutron multiplicity measurements - aims to be a test-bed for new detector technologies like WbLS and Large Area Picosecond Photodetectors (LAPPDs). For that, the ANNIE collaboration deployed an acrylic vessel filled with WbLS for several months and intends to use a greater volume of the liquid in the future.
A necessary step for the Cherenkov/scintillation light separation algorithm is the modification and application of the TTR to ANNIE data. This is the focus of this talk together with an introduction to the ANNIE experiment and the TTR algorithm. The presented work is supported by the DFG.

Keywords: Water-based Liquid Scintillator; LAPPD; Cherenkov; Reconstruction; ANNIE