Papers › High-dimensional Anomaly Detection with Radiative Return in e⁺e⁻ Collisions

High-dimensional Anomaly Detection with Radiative Return in e⁺e⁻ Collisions

30 Aug 2021arXiv:2108.13451links table onlyarchive 2025-07-28

Julia Gonski, Jerry Lai, Benjamin Nachman, Inês Ochoa

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Experiments at a future e⁺e⁻ collider will be able to search for new particles with masses below the nominal centre-of-mass energy by analyzing collisions with initial-state radiation (radiative return). We show that machine learning methods that use imperfect or missing training labels can achieve sensitivity to generic new particle production in radiative return events. In addition to presenting an application of the classification without labels (CWoLa) search method in e⁺e⁻ collisions, our study combines weak supervision with variable-dimensional information by deploying a deep sets neural network architecture. We have also investigated some of the experimental aspects of anomaly detection in radiative return events and discuss these in the context of future detector design.

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