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Boffi, S.; Glozman, L.Ya.; Klink, W.; Plessas, W.; Radici, Marco; Wagenbrunn, R. F.

doi:10.1007/s10050-002-8784-3

Cited by 88 publications

(155 citation statements)

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“…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%

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Nucleon electromagnetic form factors

Perdrisat

Punjabi

Vanderhaeghen

2007

Progress in Particle and Nuclear Physics

475

583

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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.

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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

475

583

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“…After this transformation, the spin of the nucleon must be formed by summing the spin of the bystander quark, which is still aligned antiparallel to that of the nucleon, and the orbital angular momentum between that quark and the scalar diquark. 9 This argument, while not sophisticated, does motivate an expectation that Diagram 4 will strongly impact on the nucleons' magnetic form factors.…”

Section: Diagrammentioning

confidence: 99%

“…These two-loop diagrams are the so-called "seagull" terms, which appear as partners to Diagram 3 and arise because binding in the nucleons' Faddeev equations 9 A less prominent component of the amplitude has the bystander quark's spin parallel to that of the nucleon while the axial-vector diquark's is antiparallel: this q ↑ ⊕ (qq) ↓ 1 + system has one unit of angular momentum. That momentum is absent in the q ↑ ⊕ (qq) 0 + system.…”

Section: Diagrams 5 Andmentioning

confidence: 99%

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On Nucleon Electromagnetic Form Factors

et al. 2005

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Abstract. A Poincaré covariant Faddeev equation, which describes baryons as composites of confined-quarks and -nonpointlike-diquarks, is solved to obtain masses and Faddeev amplitudes for the nucleon and ∆. The amplitudes are a component of a nucleon-photon vertex that automatically fulfills the Ward-Takahashi identity for on-shell nucleons. These elements are sufficient for the calculation of a quark core contribution to the nucleons' electromagnetic form factors. An accurate description of the static properties is not possible with the core alone but the error is uniformly reduced by the incorporation of meson-loop contributions. Such contributions to form factors are noticeable for Q 2 2 GeV 2 but vanish with increasing momentum transfer. Hence, larger Q 2 experiments probe the quark core. The calculated behaviour of] GeV 2 agrees with that inferred from polarisation transfer data. Moreover, Q 2 F 2 (Q 2 )/F 1 (Q 2 ) ≈ constant on this domain. These outcomes result from correlations in the proton's amplitude. January 25, 2018

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Nucleon elastic form factors

Day

The IVth International Conference on Quarks and Nuclear Physics

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The nucleon elastic form factors are of fundamental interest, provide a unique testing ground for QCD motivated models of nucleon structure and are of critical importance to our understanding of the electromagnetic properties of nuclei. Even after an experimental effort spanning nearly 50 years the nucleon form factors are still the subject of active investigation. Advances in polarized beams, polarized targets and recoil polarimetry have been exploited over the last decade to produce an important and precise set of data. I review the status of the experimental efforts to measure the nucleon elastic form factors.

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Cited by 88 publications

References 0 publications

Nucleon electromagnetic form factors

Nucleon electromagnetic form factors

On Nucleon Electromagnetic Form Factors

Nucleon elastic form factors

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