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Advancing tools for simulation-based inference

Henning Bahl, Victor Bresó-Pla, Giovanni De Crescenzo, Tilman Plehn

SciPost Phys. Core 8, 060 (2025) · published 29 September 2025

Abstract

We study the benefit of modern simulation-based inference to constrain particle interactions at the LHC. We explore ways to incorporate known physics structures into likelihood estimation, specifically morphing-aware estimation and derivative learning. Technically, we introduce a new and more efficient smearing algorithm, illustrate how uncertainties can be approximated through repulsive ensembles, and show how equivariant networks can improve likelihood estimation. After illustrating these aspects for a toy model, we target di-boson production at the LHC and find that our improvements significantly increase numerical control and stability.

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