Designing Observables for Measurements with Deep Learning
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arXiv
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| Format: | Preprint |
| Published: |
2023
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| _version_ | 1866914951265779712 |
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| author | Long, Owen Nachman, Benjamin |
| author_facet | Long, Owen Nachman, Benjamin |
| contents | Many analyses in particle and nuclear physics use simulations to infer fundamental, effective, or phenomenological parameters of the underlying physics models. When the inference is performed with unfolded cross sections, the observables are designed using physics intuition and heuristics. We propose to design targeted observables with machine learning. Unfolded, differential cross sections in a neural network output contain the most information about parameters of interest and can be well-measured by construction. The networks are trained using a custom loss function that rewards outputs that are sensitive to the parameter(s) of interest while simultaneously penalizing outputs that are different between particle-level and detector-level (to minimize detector distortions). We demonstrate this idea in simulation using two physics models for inclusive measurements in deep inelastic scattering. We find that the new approach is more sensitive than classical observables at distinguishing the two models and also has a reduced unfolding uncertainty due to the reduced detector distortions. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2310_08717 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Designing Observables for Measurements with Deep Learning Long, Owen Nachman, Benjamin Data Analysis, Statistics and Probability Machine Learning High Energy Physics - Experiment Many analyses in particle and nuclear physics use simulations to infer fundamental, effective, or phenomenological parameters of the underlying physics models. When the inference is performed with unfolded cross sections, the observables are designed using physics intuition and heuristics. We propose to design targeted observables with machine learning. Unfolded, differential cross sections in a neural network output contain the most information about parameters of interest and can be well-measured by construction. The networks are trained using a custom loss function that rewards outputs that are sensitive to the parameter(s) of interest while simultaneously penalizing outputs that are different between particle-level and detector-level (to minimize detector distortions). We demonstrate this idea in simulation using two physics models for inclusive measurements in deep inelastic scattering. We find that the new approach is more sensitive than classical observables at distinguishing the two models and also has a reduced unfolding uncertainty due to the reduced detector distortions. |
| title | Designing Observables for Measurements with Deep Learning |
| topic | Data Analysis, Statistics and Probability Machine Learning High Energy Physics - Experiment |
| url | https://arxiv.org/abs/2310.08717 |