Photon Reconstruction in the Belle II Calorimeter Using Graph Neural Networks

Abstract

We present the study of a fuzzy clustering algorithm for the Belle II electromagnetic calorimeter using Graph Neural Networks. We use a realistic detector simulation including simulated beam backgrounds and focus on the reconstruction of both isolated and overlapping photons. We find significant improvements of the energy resolution compared to the currently used reconstruction algorithm for both isolated and overlapping photons of more than 30% for photons with energies E < 0.5 GeV and high levels of beam backgrounds. Overall, the GNN reconstruction improves the resolution and reduces the tails of the reconstructed energy distribution and therefore is a promising option for the upcoming high luminosity running of Belle II.

arXiv comment18 pages, 11 figures

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• Photon Reconstruction in the Belle II Calorimeter Using Graph Neural Networks

Cited by in corpus (5)

• Photon Reconstruction in the Belle II Calorimeter Using Graph Neural Networks
• Real-time Graph Building on FPGAs for Machine Learning Trigger Applications in Particle Physics
• End-to-End Multi-Track Reconstruction using Graph Neural Networks at Belle II
• Systematic analysis of search strategies for $L_{\mu }-L_{\tau }$ gauge bosons at Belle II
• Real-time graph neural networks on FPGAs for the Belle II electromagnetic calorimeter