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T: Fachverband Teilchenphysik

T 93: Data, AI, Computing, Electronics VIII

T 93.5: Vortrag

Freitag, 20. März 2026, 10:00–10:15, KH 00.024

PanShower: One model for all calorimeter showers — •Thorsten Buss^1,2, Henry Day-Hall², Frank Gaede², Gregor Kasieczka¹, and Katja Krüger² — ¹Universität Hamburg, Hamburg, Germany — ²Deutsches Elektronen-Synchrotron (DESY), Hamburg, Germany

Accurate and efficient detector simulation is essential for modern collider experiments. To reduce the high computational cost, various fast machine learning surrogate models have been proposed. Traditional surrogate models for calorimeter shower modeling train separate networks for each particle species, limiting scalability and reuse. We introduce PanShower, a unified generative model that simulates calorimeter showers across multiple particle types using a single generative model. PanShower is a continuous normalizing flow model with a Transformer architecture, enabling it to generate complex spatial and energy correlations in variable-length point cloud representations of showers. Trained on a diverse dataset of simulated showers in the highly granular ILD detector, the model demonstrates the ability to generate realistic showers for electrons, photons, charged and neutral hadrons over a wide range of incident energies and angles without the need for retraining.

Keywords: calorimeter simulation; generative modeling; fast simulation