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

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 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.

10 pages, 6 figures. Prepared for the The European Physical Journal Special Topic on the Chiral dynamics for the Standard Model and beyond

References in corpus (25)

• Parton distributions for the LHC
• Generalized Parton Distributions
• Nonforward Parton Distributions
• Impact Parameter Space Interpretation for Generalized Parton Distributions
• NNLO global parton analysis
• Global analysis of proton elastic form factor data with two-photon exchange corrections
• Nucleon Form Factors from Generalized Parton Distributions
• Generalized Parton Distributions in the valence region from Deeply Virtual Compton Scattering
• Non--Singlet QCD Analysis of Deep Inelastic World Data at \boldmath $O({\alpha }_s^3)$
• Nucleon form factors, generalized parton distributions and quark angular momentum
• Systematics of radial and angular-momentum Regge trajectories of light non-strange q\bar{q}-states
• γ*γ\rightarrow π^0 transition form factor at low-energies from a model-independent approach
• Generalized Parton Distributions and Description of Electromagnetic and Graviton form factors of nucleon
• Flavor decomposition of the nucleon electromagnetic form factors
• The ${\eta }^{\prime }$ transition form factor from space- and time-like experimental data
• The eta transition form factor from space- and time-like experimental data
• Meson dominance of hadron form factors and large-Nc phenomenology
• Generalized Parton Distributions and Their Singularities
• Hadron structure at low Q^2
• Nonsinglet parton distribution functions from the precise next-to-next-to-next-to leading order QCD fit
• The N${}^3$LO Scheme-invariant QCD Evolution of the Non-singlet Structure Functions \boldmath $F_2^{\mathrm{NS}}(x,Q^2)$ and $g_1^{\mathrm{NS}}(x,Q^2)$
• Hadron form factors and large-Nc phenomenology
• Form factors of the nucleon by using the t dependence of parton distribution functions
• Examining the structure functions of nucleons by introducing new Ansatz and their consequences on parton distribution functions in higher approximation
• Parametrization of zero-skewness unpolarized GPDs