Low-Q^2 scaling behavior of the form-factor ratios for the NΔ(1232)-transition

Abstract

We address the issue of the scaling behavior of the nucleon electromagnetic form factors (FFs). We propose a consistent Lagrangian of the electromagnetic NΔ(1232)-interaction possessing all the internal symmetries of the spin-3/2 baryon resonance, point and gauge invariance. The point and gauge invariant FFs may exhibit quasi-scaling behavior--while the FFs do not reach asymptotic scaling domain, the ratios thereof do. The hypothesis of the quasi-scaling is in good agreement with the experimental data available at Q^2 > 0.4 GeV^2.

6 pages, 2 figures

References in corpus (12)

• Big Bang Nucleosynthesis (in "The Review of Particle Properties" 2004)
• Electromagnetic excitation of the Delta(1232)-resonance
• Electroexcitation of nucleon resonances from CLAS data on single pion electroproduction
• Investigation of the conjectured nucleon deformation at low momentum transfer
• Extraction and Interpretation of gamma N --> Delta Form Factors within a Dynamical Model
• Recoil Polarization for Delta Excitation in Pion Electroproduction
• Light Cone Sum Rules for gamma* N -> Delta Transition Form Factors
• Measurement of the LT-asymmetry in π^0 electroproduction at the energy of the Δ(1232) resonance
• Measurements of the gamma*p->Delta Reaction At Low Q^2: Probing the Mesonic Contribution
• Neutral Pion Electroproduction in the Resonance Region at High $Q^2$
• Virtual Compton Scattering measurements in the ${\gamma }^{\ast }N\to \Delta$ transition
• Q^2-evolution of nucleon-to-resonance transition form factors in a QCD-inspired vector-meson-dominance model

Cited by in corpus (4)

• Electroexcitation of nucleon resonances
• Electromagnetic Transition Form Factors of Baryon Resonances
• Gauge- and point-invariant vertices of nucleon-to-resonance interactions
• Symmetries of higher-spin fields and the electromagnetic N-N(1680) form factors