IRN Terascale @ IPHC Strasbourg

Session

Methods and Tools

20 mai 2025, 14:00

Amphi Grünewald (IPHC)

20. From the MSSM to the SMEFT with MATCHETE

Andre Lessa

20/05/2025 14:00

Methods and Tools

We present the complete one-loop matching of the Minimal Supersymmetric Standard Model (MSSM) onto the Standard Model Effective Field Theory (SMEFT), considering the most general case for the MSSM with conserved R-parity, which has 124 free parameters. The matching is performed with the MATCHETE package, integrating out all superpartners at once with non-degenerate masses. We validate against...

6. OperatorToC++: Transpiling Matched EFT Coefficients to Low-Level Routines

Suraj Prakash - (IFIC (Universitat de Valencia - CSIC))

20/05/2025 14:20

Methods and Tools

In recent years, significant progress has been made in the development of automated tools that match the parameters of new physics models and the Wilson coefficients of appropriate low-energy Effective Field Theories. This talk will shed light on an extensible, hybrid tool OperatorToC++, that combines the strengths of Mathematica and C++ to facilitate the next steps beyond the matching....

22. Introduction to ML for particle physics in the precision era

Henning Bahl (Universität Heidelberg)

20/05/2025 14:40

In the precision era of particle physics, accurate theoretical predictions and utilizing the full experimental information are key for advancing our understanding of fundamental physics. In my talk, I will show how machine learning can help us to achieve both in a controlled manner including well-calibrated uncertainties.

18. Generative Unfolding with Distribution Mapping

Nathan Huetsch (Heidelberg University)

20/05/2025 16:00

Methods and Tools

Machine learning enables unbinned, highly-differential cross section measurements. A recent idea uses generative models to morph the measured distribution into the unfolded distribution. We show how to extend two morphing techniques, Schrödinger Bridges and Direct Diffusion, in order to ensure that the models learn the correct conditional probabilities. This brings distribution mapping to a...

12. How to Unfold Top Decays

Sofia Palacios Schweitzer (ITP, Heidelberg University)

20/05/2025 16:20

Methods and Tools

Many physics analyses at the LHC rely on algorithms to remove detector effect, commonly known as unfolding. Whereas classical methods only work with binned, one-dimensional data, Machine Learning promises to overcome both problems. Using a generative unfolding pipeline, we show how it can be build into an existing LHC analysis, designed to measure the top mass. We discuss the model-dependence...

8. A Lorentz-Equivariant Transformer for All of the LHC

Jonas Spinner (Heidelberg University)

20/05/2025 16:40

Methods and Tools

We show that the Lorentz-Equivariant Geometric Algebra Transformer (L-GATr) yields state-of-the-art performance for a wide range of machine learning tasks at the Large Hadron Collider. L-GATr represents data in a geometric algebra over space-time and is equivariant under Lorentz transformations. The underlying architecture is a versatile and scalable transformer, which is able to break...

13. Profile Likelihoods on ML-Steroids

Nikita Schmal (ITP, Heidelberg University)

20/05/2025 17:00

Methods and Tools

Global SMEFT analyses combine a vast range of LHC measurements to construct likelihoods to put constraints on physics beyond the Standard Model. However, constructing and evaluating profile likelihoods for such analyses is computationally intensive and prone to instability and noise. We show how modern numerical techniques, similar to neural importance sampling, can dramatically enhance both...