A case study of sending graph neural networks back to the test bench for applications in high-energy particle physics

• URL: http://arxiv.org/abs/2402.17386v1
• Date: Tue, 27 Feb 2024 10:26:25 GMT
• Title: A case study of sending graph neural networks back to the test bench for applications in high-energy particle physics
• Authors: Emanuel Pfeffer and Michael Wa{\ss}mer and Yee-Ying Cung and Roger Wolf and Ulrich Husemann
• Abstract summary: In high-energy particle collisions the primary collision products usually decay further resulting in tree-like, hierarchical structures with a priori unknown multiplicity. The analogy to mathematical graphs gives rise to the idea that graph neural networks (GNNs) should be best-suited to address many tasks related to high-energy particle physics. We describe a benchmark test of a typical GNN against neural networks of the well-established deep fully-connected feed-forward architecture.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: In high-energy particle collisions, the primary collision products usually decay further resulting in tree-like, hierarchical structures with a priori unknown multiplicity. At the stable-particle level all decay products of a collision form permutation invariant sets of final state objects. The analogy to mathematical graphs gives rise to the idea that graph neural networks (GNNs), which naturally resemble these properties, should be best-suited to address many tasks related to high-energy particle physics. In this paper we describe a benchmark test of a typical GNN against neural networks of the well-established deep fully-connected feed-forward architecture. We aim at performing this comparison maximally unbiased in terms of nodes, hidden layers, or trainable parameters of the neural networks under study. As physics case we use the classification of the final state X produced in association with top quark-antiquark pairs in proton-proton collisions at the Large Hadron Collider at CERN, where X stands for a bottom quark-antiquark pair produced either non-resonantly or through the decay of an intermediately produced Z or Higgs boson.

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