Papers › Bump Hunting in Latent Space

Bump Hunting in Latent Space

11 Mar 2021arXiv:2103.06595archive 2025-07-28

Blaž Bortolato, Barry M. Dillon, Jernej F. Kamenik, Aleks Smolkovič

Unsupervised anomaly detection could be crucial in future analyses searching for rare phenomena in large datasets, as for example collected at the LHC. To this end, we introduce a physics inspired variational autoencoder (VAE) architecture which performs competitively and robustly on the LHC Olympics Machine Learning Challenge datasets. We demonstrate how embedding some physical observables directly into the VAE latent space, while at the same time keeping the classifier manifestly agnostic to them, can help to identify and characterise features in measured spectra as caused by the presence of anomalies in a dataset.

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Anomaly DetectionBIG-bench Machine LearningUnsupervised Anomaly Detection

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