Covariant diquark-quark model of the nucleon in the Salpeter approach.

  title={Covariant diquark-quark model of the nucleon in the Salpeter approach.},
  journal={Physical review. C, Nuclear physics},
  volume={54 6},
  • Keiner
  • Published 5 March 1996
  • Physics
  • Physical review. C, Nuclear physics
We develop a 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 the proton electric and magnetic form… 

Figures from this paper

Baryons in a covariant and confining diquark - quark model
In a covariant model where constituent quarks and diquarks interact through quark exchange, the Bethe-Salpeter equation in ladder approximation for octet and decuplet baryons is solved. Quark and
Electromagnetic N-Δ transition form factors in a covariant quark-diquark model
The electromagnetic N-Δ transition form factors are calculated in the framework of a formally covariant constituent diquark model. As a spin-$tfrac {3}{2}$ particle the Δ is assumed to be a bound
Electromagnetic and gravitational form factors of Δ resonance in a covariant quark-diquark approach
In this work, the electromagnetic and gravitational form factors of a spin-3/2 particle, ∆ resonance, are simultaneously calculated with the help of a relativistic covariant quark-diquark approach.
Zero modes in electromagnetic form factors of the nucleon in a light-cone diquark model
We use a diquark model of the nucleon to calculate the electromagnetic forrn factors of the nucleon described as a scalar and axialvector diquark bound state. We provide an analysis of the zero-mode
Modifications to the Hadronic Regge Trajectories
The effect of quark mass on the Regge trajectory is analysed. Modifications in the equations of Regge trajectories are shown for mesonic as well as baryonic systems. For mesonic systems, the Regge
Baryon Magnetic Moment and Beta Decay Ratio in Colored Quark Cluster Model
Baryon magnetic moments of p, n, Σ+, Σ−, Ξ0, Ξ− and the beta decay ratios (GA/GV) of n → p, Σ− → n and Ξ0 → Σ+ are calculated in a colored quark cluster model. With SU(3) breaking, the model gives a
Mass spectra and wave functions of the doubly heavy baryons with JP=1+ heavy diquark cores
Mass spectra and wave functions of the doubly heavy baryons are computed assuming that the two heavy quarks inside a baryon form a compact heavy ‘diquark core’ in a color anti-triplet, and bind with