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arXiv · 2512.23107

From QCD-Based Descriptions to Direct Fits: A Unified Study of Nucleon Electromagnetic Form Factors

Hossein Vaziri·Mohammad Reza Shojaei·Pere Masjuan
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Abstract

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 Pad\'e-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.

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Hossein Vaziri, Mohammad Reza Shojaei, Pere Masjuan. 2025-12-28. From QCD-Based Descriptions to Direct Fits: A Unified Study of Nucleon Electromagnetic Form Factors. https://doi.org/10.1140/epjs%2Fs11734-026-02193-2

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