Nucleon electromagnetic form factors with non-local chiral effective Lagrangian

Abstract

The relativistic version of finite-range-regularisation is proposed. The covariant regulator is generated from the nonlocal Lagrangian. This nonlocal interaction is gauge invariant and is applied to study the nucleon electromagnetic form factors at momentum transfer up to 2 GeV${}^2$. Both octet and decuplet intermediate states are included in the one loop calculation. Using a dipole regulator with $\Lambda$ around 0.85 GeV, the obtained form factors, electromagnetic radii as well as the ratios of the form factors are all comparable with the experimental data. This successful application of chiral effective Lagrangian to relatively large momentum transfer make it possible to further investigation of hadron quantities at high $Q^2$.

14 pages, 8 figures

References in corpus (7)

• Electromagnetic excitation of the Delta(1232)-resonance
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• The nucleon electromagnetic form factors from Lattice QCD
• Chiral extrapolation of nucleon magnetic form factors
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• Electromagnetic form factors of octet baryons with the nonlocal chiral effective theory
• Strange form factors of nucleon with nonlocal chiral effective Lagrangian
• Generalized parton distributions of sea quarks in the proton from nonlocal chiral effective theory
• Octet and decuplet baryon self-energies in relativistic SU(3) chiral effective theory
• Nucleon Structure from Basis Light-Front Quantization : Status and Prospects
• Sea quark contributions to nucleon electromagnetic form factors with the nonlocal chiral effective Lagrangian
• Contributions to the nucleon form factors from bubble and tadpole diagrams
• Color confinement, dark matter and the missing of anti-matter
• Helicity-dependent distribution of strange quarks in the proton from nonlocal chiral effective theory
• Sea quark contributions to the electromagnetic form factors of $\Sigma$ hyperons