Conditional normalizing flows for IceCube event reconstruction ...

• Main Author: Glüsenkamp, Thorsten
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: arXiv 2023
• Subjects: High Energy Astrophysical Phenomena astro-ph.HE; Instrumentation and Methods for Astrophysics astro-ph.IM; Artificial Intelligence cs.AI; High Energy Physics - Experiment hep-ex; FOS Physical sciences; FOS Computer and information sciences; Antarc*; Antarctic
• Online Access: https://dx.doi.org/10.48550/arxiv.2309.16380; https://arxiv.org/abs/2309.16380

The IceCube Neutrino Observatory is a cubic-kilometer high-energy neutrino detector deployed in the Antarctic ice. Two major event classes are charged-current electron and muon neutrino interactions. In this contribution, we discuss the inference of direction and energy for these classes using conditional normalizing flows. They allow to derive a posterior distribution for each individual event based on the raw data that can include systematic uncertainties, which makes them very promising for next-generation reconstructions. For each normalizing flow we use the differential entropy and the KL-divergence to its maximum entropy approximation to interpret the results. The normalizing flows correctly incorporate complex optical properties of the Antarctic ice and their relation to the embedded detector. For showers, the differential entropy increases in regions of high photon absorption and decreases in clear ice. For muons, the differential entropy strongly correlates with the contained track length. Coverage ... : Presented at the 38th International Cosmic Ray Conference (ICRC2023). See arXiv:2307.13047 for all IceCube contributions ...