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Machine Learning in High Energy Physics: A review of heavy-flavor jet tagging at the LHC
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The application of machine learning (ML) in high energy physics (HEP), specifically in heavy-flavor jet tagging at Large Hadron Collider (LHC) experiments, has experienced remarkable growth and innovation in the past decade. This review provides a detailed examination of current and past ML techniques in this domain. It starts by exploring various data representation methods and ML architectures, encompassing traditional ML algorithms and advanced deep learning techniques. Subsequent sections discuss specific instances of successful ML applications in jet flavor tagging in the ATLAS and CMS experiments at the LHC, ranging from basic fully-connected layers to graph neural networks employing attention mechanisms. To systematically categorize the advancements over the LHC's three runs, the paper classifies jet tagging algorithms into three generations, each characterized by specific data representation techniques and ML architectures. This classification aims to provide an overview of the chronological evolution in this field. Finally, a brief discussion about anticipated future developments and potential research directions in the field is presented.
Forward citations
Cited by 4 Pith papers
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Simplex Demixing: Disentangling Multiple Light-Flavor Jets at Colliders
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Investigation of the performance of a GNN-based b-jet tagging method in heavy-ion collisions
A GNN-based b-jet tagger adapted from ATLAS's GN1 retains good performance on simulated Pb-Pb background when retrained per centrality, despite degradation when applied out-of-the-box.
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KIGNet: Physics-Motivated Multi-Graph Representation Learning for Explainable Jet Tagging
E-PCN reaches 94.67% macro-accuracy on 10-class jet tagging by weighting graphs with angular separation, transverse momentum, momentum fraction, and invariant mass, with Grad-CAM showing the first two account for 76% ...
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Shedding Light on Dark Matter at the LHC with Machine Learning
A machine-learned LHC analysis projects 5-sigma sensitivity to singlino-dominated NMSSM dark matter via radiative higgsino decays to photons, covering higgsino masses up to 225 GeV.
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