From QCD-Based Descriptions to Direct Fits: A Unified Study of Nucleon Electromagnetic Form Factors
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arXiv
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| Hauptverfasser: | , , |
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| Format: | Preprint |
| Veröffentlicht: |
2025
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| _version_ | 1866915928818581504 |
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| author | Vaziri, Hossein Shojaei, Mohammad Reza Masjuan, Pere |
| author_facet | Vaziri, Hossein Shojaei, Mohammad Reza Masjuan, Pere |
| contents | We present a detailed study of the nucleon electromagnetic form factors in the spacelike region by combining three complementary approaches: two GPD-based contributions and a vector-meson exchange component. By fitting experimental data, we extract the optimal weights and shape parameters describing the proton and neutron form factors. Global Padé-based fits are then constructed for four distinct groups of form factors, starting from local Taylor expansions and yielding stable analytic parametrizations over the analyzed $t$ range. The combined framework provides an accurate and physically motivated description of nucleon structure within a controlled model-dependent setting across a wide range of momentum transfers. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_23107 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | From QCD-Based Descriptions to Direct Fits: A Unified Study of Nucleon Electromagnetic Form Factors Vaziri, Hossein Shojaei, Mohammad Reza Masjuan, Pere High Energy Physics - Phenomenology We present a detailed study of the nucleon electromagnetic form factors in the spacelike region by combining three complementary approaches: two GPD-based contributions and a vector-meson exchange component. By fitting experimental data, we extract the optimal weights and shape parameters describing the proton and neutron form factors. Global Padé-based fits are then constructed for four distinct groups of form factors, starting from local Taylor expansions and yielding stable analytic parametrizations over the analyzed $t$ range. The combined framework provides an accurate and physically motivated description of nucleon structure within a controlled model-dependent setting across a wide range of momentum transfers. |
| title | From QCD-Based Descriptions to Direct Fits: A Unified Study of Nucleon Electromagnetic Form Factors |
| topic | High Energy Physics - Phenomenology |
| url | https://arxiv.org/abs/2512.23107 |