Baryon form factors in a diquark-quark bound state description

Abstract

Nucleon form factors are calculated in a relativistic diquark--quark picture based on the Nambu--Jona-Lasinio model. The nucleon wave function is obtained in a static approximation to the quark exchange interaction between the valence quark and the diquark. We evaluate the valence quark and $0^{+}$--diquark contribution to the nucleon electromagnetic and weak currents. We find reasonable electric charge radii, magnetic moments as in the additive diquark model, and $g_A\approx 1$. We discuss the dependence on the model parameters.

10 pages, latex, 1 postscript figure included (uuencoded)

References in corpus (4)

• Baryonic Correlation Functions in the Random Instanton Vacuum
• Diquark electromagnetic form factors in a Nambu-Jona-Lasinio model
• The nucleon as a relativistic quark-diquark bound state with an exchange potential
• Off-shell pion electromagnetic form factor from a gauge-invariant Nambu-Jona-Lasinio model

Cited by in corpus (15)

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• Axial vector diquark correlations in the nucleon: Structure functions and static properties
• Baryon structure in a quark-confining non-local NJL model
• Nucleon electromagnetic form factors with non-local chiral effective Lagrangian
• Nucleon Structure Functions at Moderate Q**2: Relativistic Constituent Quarks and Spectator Mass Spectrum
• A covariant diquark-quark model of the nucleon in the Salpeter approach
• Electromagnetic form factors of the nucleon in a covariant diquark model
• Strange form factors of nucleon with nonlocal chiral effective Lagrangian
• Effective Chiral Meson-Baryon Lagrangian from Path Integral Hadronization of a Quark-Diquark Model
• Path-integral hadronization for the nucleon and its interactions
• Diquark and nucleons under strong magnetic fields in the NJL model
• Nucleon magnetic form factors with non-local chiral effective Lagrangian