Reconstruction of Neutrino Events in IceCube using Graph Neural Networks

The IceCube Neutrino Observatory is a cubic-kilometer scale neutrino detector embedded in the Antarctic ice of the South Pole. In the near future, the detector will be augmented by extensions, such as the IceCube Upgrade and the planned Gen2 detector. The sparseness of observed light in the detector for low-energy events, and the irregular detector geometry, have always been a challenge to the reconstruction of the detected neutrinos' parameters of interest. This challenge remains with the IceCube Upgrade, currently under construction, which introduces seven new detector strings with novel detector modules. The Upgrade modules will increase the detection rate of low-energy events and allow us to further constrain neutrino oscillation physics. However, the geometry of these modules render existing traditional reconstruction algorithms more difficult to use. We introduce a new reconstruction algorithm based on Graph Neural Networks, which we use to reconstruct neutrino events at much faster processing times than the traditional algorithms, while providing comparable resolution. We show that our algorithm is applicable not only to reconstructing data of the current IceCube detector, but also simulated events for next-generation extensions, such as the IceCube Upgrade.

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References (11)

03Germany 59 DESY, D-15738 Zeuthen, Germany 60 Università di Padova, I-35131 Padova2021
05Prabhat2018 · W. Bhimji, M. M. Bronstein, S. R. Klein, and J. Bruna arXiv e-prints
06Aartsen2018 · Physical Review Letters
07USA 46 Physics Department, South Dakota School of Mines and Technology
08USA 35 Department ofPhysics and Astronomy
09Graph Neural Network reconstruction in IceCube Research Council; Canada -Natural Sciences and Engineering Research Council of Canada, Calcul Québec, Compute Ontario, Canada Foundation for Innovation
10Lenssen arXiv e-prints
11Fonden and Carlsberg Foundation; New Zealand -Marsden Fund; Japan -Japan Society for Promotion of Science (JSPS) and Institute for Global Prominent Research (IGPR) of Chiba University

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