A covariant diquark-quark model of the nucleon in the Salpeter approach

Abstract

We develop a rather simple, formally covariant quark-diquark model of the nucleon. The nucleon is treated as a bound state of a constituent quark and a diquark interacting via a quark exchange. We include both scalar and axial-vector diquarks. The underlying Bethe-Salpeter equation is transformed into a pair of coupled Salpeter equations. The electromagnetic form factors of the nucleon are calculated in the Mandelstam formalism. We obtain a very good description of all electromagnetic form factors for momentum transfers up to -3 (GeV/c)^2.

17 pages, REVTeX, 10 figures (ps and eps) included

References in corpus (5)

• Dispersion-Theoretical Analysis of the Nucleon Electromagnetic Formfactors
• Faddeev approach to the octet and decuplet baryons
• Baryon form factors in a diquark-quark bound state description
• Electromagnetic form factors of the nucleon in a covariant diquark model
• Octet and Decuplet Baryons in the Hadronized Nambu--Jona-Lasinio Model with Proper Spin Projection

Cited by in corpus (13)

• Octet and Decuplet Baryons in a Covariant and Confining Diquark-Quark Model
• Nucleon Form Factors in a Covariant Diquark-Quark Model
• Nucleon form factors and a nonpointlike diquark
• The mass spectra and wave functions for the doubly heavy baryons with $J^P=1^{+}$ heavy diquark core
• Path-integral hadronization for the nucleon and its interactions
• Electromagnetic N-$\Delta$ transition form factors in a covariant quark-diquark model
• FCNC transitions of ${\Lambda }_b$ to neutron in Bethe-Salpeter equation approach
• A Comparison between Relativistic and Semi-Relativistic Treatment in the Diquark-Quark Model
• Mass spectra, wave functions and mixing effects of the $(bcq)$ baryon
• Zero Modes in Electromagnetic Form Factors of the Nucleon in a Light-Cone Diquark Model
• Modifications to the Hadronic Regge Trajectories
• Transition from hadronic to partonic interactions for a composite spin-1/2 model of a nucleon
• Isospin breaking from diquark clustering