Robust Calibration of Non-Perturbative Models with History Matching
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| Main Authors: | , , , |
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| Format: | Preprint |
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2026
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| _version_ | 1866911469456588800 |
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| author | Iskauskas, Andrew Knobbe, Max Krauss, Frank Schumann, Steffen |
| author_facet | Iskauskas, Andrew Knobbe, Max Krauss, Frank Schumann, Steffen |
| contents | We apply, for the first time, Bayes Linear Emulation and History Matching to the calibration of non-perturbative models in Monte Carlo event generators. In contrast to the usual approach of "Monte Carlo tuning", History Matching does not result in best-fit plus ellipsoidal parameter uncertainty estimates but instead identifies all parameter space regions that are consistent with data. This approach leads to a systematic and robust quantification of parametric uncertainties in the models, especially in those challenging cases where different, possibly disjoint, regions of parameter space deliver similar results, which are usually not properly treated with current methodology. We highlight the power of this method with the hadronisation models available through Sherpa: the built-in cluster fragmentation Ahadic and string fragmentation through an interface to Pythia. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2602_22324 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | Robust Calibration of Non-Perturbative Models with History Matching Iskauskas, Andrew Knobbe, Max Krauss, Frank Schumann, Steffen High Energy Physics - Phenomenology High Energy Physics - Experiment We apply, for the first time, Bayes Linear Emulation and History Matching to the calibration of non-perturbative models in Monte Carlo event generators. In contrast to the usual approach of "Monte Carlo tuning", History Matching does not result in best-fit plus ellipsoidal parameter uncertainty estimates but instead identifies all parameter space regions that are consistent with data. This approach leads to a systematic and robust quantification of parametric uncertainties in the models, especially in those challenging cases where different, possibly disjoint, regions of parameter space deliver similar results, which are usually not properly treated with current methodology. We highlight the power of this method with the hadronisation models available through Sherpa: the built-in cluster fragmentation Ahadic and string fragmentation through an interface to Pythia. |
| title | Robust Calibration of Non-Perturbative Models with History Matching |
| topic | High Energy Physics - Phenomenology High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2602.22324 |