Aachen 2019 – wissenschaftliches Programm

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T: Fachverband Teilchenphysik

T 95: Neutrinos: Myon-Rekonstruktion

T 95.6: Vortrag

Donnerstag, 28. März 2019, 17:20–17:35, H11

Potential of the application of the Topological Track Reconstruction to ANNIE — •Felix Benckwitz, Caren Hagner, David Meyhöfer, Henning Rebber, Malte Stender, and Björn Wonsak — Universität Hamburg, Institut für Experimentalphysik

Neutron tagging is an important technique to reduce the background in proton decay searches and precision measurements of neutrino oscillations in water Cherenkov detectors. Therefore, the neutron yield per neutrino energy is a vital input for MC simulations to accurately calculate the background rejection. The measurement of the neutron yield as a function of the transferred momentum for charged current and neutral current neutrino interactions is the goal of the Accelerator Neutrino Neutron Interaction Experiment (ANNIE). In order to achieve this goal, ANNIE deploys a 26 t gadolinium-doped water Cherenkov detector at the Fermilab Booster Neutrino Beam. To meet the vertex reconstruction requirements in a small detector volume, ANNIE, besides conventional PMTs, makes use of Large Area Picosecond Photo Detectors (LAPPDs), which yield a spatial resolution of ∼1 mm and a time resolution of ∼50 ps. These characteristics, as well as the instantaneous Cherenkov light make ANNIE a perfect testing field for the Topological Track Reconstruction, which uses the temporarily and spatially detected photon hits to reconstruct the spatial number density of emitted photons. The potential of the Topological Track Reconstruction using Cherenkov light, as well as LAPPDs and its advantages over currently used reconstruction methods are discussed.