FASTColor -- Full-color Amplitude Surrogate Toolkit for QCD
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
| Published: |
2025
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| _version_ | 1866912576769622016 |
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| author | Villadamigo, Javier Mariño Frederix, Rikkert Plehn, Tilman Vitos, Timea Winterhalder, Ramon |
| author_facet | Villadamigo, Javier Mariño Frederix, Rikkert Plehn, Tilman Vitos, Timea Winterhalder, Ramon |
| contents | High-multiplicity events remain a bottleneck for LHC simulations due to their computational cost. We present a ML-surrogate approach to accelerate matrix element reweighting from leading-color (LC) to full-color (FC) accuracy, building on recent advancements in LC event generation. Comparing a variety of modern network architectures for representative QCD processes, we achieve speed-up of around a factor two over the current LC-to-FC baseline. We also show how transformers learn and exploit underlying symmetries, to improve generalization. Given the gained trust in trained networks and developments in learned uncertainties, the LC-to-FC approach will eventually benefit further from not needing a final classic unweighting step. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2509_07068 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | FASTColor -- Full-color Amplitude Surrogate Toolkit for QCD Villadamigo, Javier Mariño Frederix, Rikkert Plehn, Tilman Vitos, Timea Winterhalder, Ramon High Energy Physics - Phenomenology High-multiplicity events remain a bottleneck for LHC simulations due to their computational cost. We present a ML-surrogate approach to accelerate matrix element reweighting from leading-color (LC) to full-color (FC) accuracy, building on recent advancements in LC event generation. Comparing a variety of modern network architectures for representative QCD processes, we achieve speed-up of around a factor two over the current LC-to-FC baseline. We also show how transformers learn and exploit underlying symmetries, to improve generalization. Given the gained trust in trained networks and developments in learned uncertainties, the LC-to-FC approach will eventually benefit further from not needing a final classic unweighting step. |
| title | FASTColor -- Full-color Amplitude Surrogate Toolkit for QCD |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2509.07068 |