29 January 2024 to 2 February 2024
CERN
Europe/Zurich timezone

Generating parton-level events from reconstructed events with Conditional Normalizing Flows

1 Feb 2024, 16:15
5m
61/1-201 - Pas perdus - Not a meeting room - (CERN)

61/1-201 - Pas perdus - Not a meeting room -

CERN

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Poster 2 ML for analysis : event classification, statistical analysis and inference, including anomaly detection Poster Session

Speaker

Adrian Antonio Petre (ETH Zurich (CH))

Description

We introduce a new approach using generative machine learning to sample meaningful generator-level events given reconstructed events in the CMS detector. Our method combines Transformers and Normalizing Flows to tackle the challenge of integrating the Matrix Element Method with importance sampling. We propose using a Transformer network to analyze the full reconstructed event and extract latent information, which is then used to condition a Normalizing Flow network. This approach enables the generation of probable sets of partons that are compatible with observed objects. We demonstrate the performance of our approach on a complex final state, like ttH(bb) in the semileptonic decay channel, and discuss potential applications.

Primary author

Adrian Antonio Petre (ETH Zurich (CH))

Presentation materials