Electromagnetic form factors of the nucleon in a covariant diquark model

Abstract

We present a simple covariant constituent diquark-quark model for the nucleon. The nucleon is assumed to be composed of a scalar diquark and a quark which interact via a quark exchange. Starting from the Bethe-Salpeter equation, the instantaneous approximation leads to a diquark-quark Salpeter equation. In the Mandelstam formalism, the electromagnetic form factors of the nucleon are calculated for momentum transfers up to $q^2 = - 3 \; (\mbox{GeV/c})^2$. A remarkable description of the experimental data is obtained. Especially, the model gives nearly the right values for the proton and (negative) neutron charge radii, and a qualitative description of the magnetic form factors.

17 pages, revtex, 8 figures in additional file

References in corpus (6)

• Analysis of the instantaneous Bethe-Salpeter equation for \(q\bar{q}\)-bound-states
• Faddeev approach to the octet and decuplet baryons
• Diquark electromagnetic form factors in a Nambu-Jona-Lasinio model
• The nucleon as a relativistic quark-diquark bound state with an exchange potential
• Baryon form factors in a diquark-quark bound state description
• A Spectator-Quark-Model for the Photoproduction of Kaons

Cited by in corpus (12)

• Diquark Correlations in Hadron Physics: Origin, Impact and Evidence
• Nucleon Form Factors in a Covariant Diquark-Quark Model
• Nucleon form factors and a nonpointlike diquark
• Baryons as Hybrids of Solitons and Three Quark Bound States
• A covariant diquark-quark model of the nucleon in the Salpeter approach
• Electromagnetic form factors of ${\Lambda }_b$ in the Bethe-Salpeter equation approach
• Path-integral hadronization for the nucleon and its interactions
• Electromagnetic N-$\Delta$ transition form factors in a covariant quark-diquark model
• A Comparison between Relativistic and Semi-Relativistic Treatment in the Diquark-Quark Model
• Mass spectra, wave functions and mixing effects of the $(bcq)$ baryon
• Study on the Form Factors at Effective Vertices of Diqarks Interacting with Gauge Bosons
• Hadronization in Particle Physics