Covariant nucleon electromagnetic form factors from the Goldstone-boson-exchange quark model

Wagenbrunn, R. F.; Boffi, S.; Klink, William H.; Plessas, W.; Radici, Marco

doi:10.1016/s0370-2693(01)00622-0

Cited by 138 publications

(149 citation statements)

References 39 publications

Supporting

Mentioning

132

Contrasting

Unclassified

Order By: Relevance

“…[35] depends on five parameters that are fixed by looking at the baryon spectrum which is well reproduced up to 2 GeV with the correct orderings of the positive-and negative-parity states in the light and strange sectors. The resulting nucleon wave functions, without any further parameter, yield a remarkably consistent picture of the electroweak form factors [34].…”

Section: Adopted Modelsmentioning

confidence: 76%

See 1 more Smart Citation

Linking generalized parton distributions to constituent quark models

2003

Self Cite

View full text Add to dashboard Cite

The link between the nucleon generalized parton distributions and the non-diagonal one-body density matrix in momentum space is studied. Attention is focussed on the region where quark generalized parton distributions (GPD's) describe emission and reabsorption of a single active quark by the target nucleon. The correct covariant connection with wave functions used in any constituent quark model is established. Results obtained with different constituent quark models are presented for the unpolarized quark GPD's.

show abstract

Section: Adopted Modelsmentioning

confidence: 76%

“…However, it is known that the SU(6) breaking part in the nucleon GBE wave function is small [34,35]. In Fig.…”

Section: Resultsmentioning

confidence: 99%

Linking generalized parton distributions to constituent quark models

2003

Self Cite

View full text Add to dashboard Cite

show abstract

“…When looking at details of Refs. [Wag01,Bof01], the agreement is worse though for G M p which is underpredicted at larger Q 2 , and the ratio of G Ep /G M p is overpredicted at larger Q 2 , see Fig. 32.…”

Section: Constituent Quark Modelsmentioning

confidence: 93%

“…It was shown in [Glo98a,Glo98b] that the GBE CQM yields a unified description of light-and strange-baryon spectra. The GBE CQM was used in [Wag01,Bof01] to calculate the nucleon e.m. FFs in the point-form. The neutron charge radius is well described in this model and is driven by the mixed-symmetry component in the neutron WF.…”

Section: Constituent Quark Modelsmentioning

confidence: 99%

Nucleon electromagnetic form factors

Perdrisat

Punjabi

Vanderhaeghen

2007

Progress in Particle and Nuclear Physics

470

588

View full text Add to dashboard Cite

There has been much activity in the measurement of the elastic electromagnetic proton and neutron form factors in the last decade, and the quality of the data has been greatly improved by performing double polarization experiments, in comparison with previous unpolarized data. Here we review the experimental data base in view of the new results for the proton, and neutron, obtained at MIT-Bates, MAMI, and JLab. The rapid evolution of phenomenological models triggered by these high-precision experiments will be discussed, including the recent progress in the determination of the valence quark generalized parton distributions of the nucleon, as well as the steady rate of improvements made in the lattice QCD calculations.

show abstract

“…Light-front quark model calculations are also available for nucleon resonances [21,527,528]. Form factor calculations in the point form approach have been performed within the chiral quark model based on Goldstone-boson exchange [529][530][531][532], the hyperspherical constituent-quark model [533] and a recent quarkdiquark model [534]. The Goldstone-boson exchange model achieved remarkably good results for a range of baryon properties also beyond nucleon form factors [535][536][537][538] using pointlike constituent quarks only.…”

Section: B Kinematics Andmentioning

confidence: 99%

Baryons as relativistic three-quark bound states

Eichmann

Sanchis-Alepuz

Williams

et al. 2016

Progress in Particle and Nuclear Physics

418

530

View full text Add to dashboard Cite

We review the spectrum and electromagnetic properties of baryons described as relativistic three-quark bound states within QCD. The composite nature of baryons results in a rich excitation spectrum, whilst leading to highly non-trivial structural properties explored by the coupling to external (electromagnetic and other) currents. Both present many unsolved problems despite decades of experimental and theoretical research. We discuss the progress in these fields from a theoretical perspective, focusing on nonperturbative QCD as encoded in the functional approach via Dyson-Schwinger and Bethe-Salpeter equations. We give a systematic overview as to how results are obtained in this framework and explain technical connections to lattice QCD. We also discuss the mutual relations to the quark model, which still serves as a reference to distinguish 'expected' from 'unexpected' physics. We confront recent results on the spectrum of non-strange and strange baryons, their form factors and the issues of two-photon processes and Compton scattering determined in the DysonSchwinger framework with those of lattice QCD and the available experimental data. The general aim is to identify the underlying physical mechanisms behind the plethora of observable phenomena in terms of the underlying quark and gluon degrees of freedom.

show abstract

Covariant nucleon electromagnetic form factors from the Goldstone-boson-exchange quark model

Cited by 138 publications

References 39 publications

Linking generalized parton distributions to constituent quark models

Linking generalized parton distributions to constituent quark models

Nucleon electromagnetic form factors

Baryons as relativistic three-quark bound states

Contact Info

Product

Resources

About